CN101164635B - Low frequency resonance biological electric therapeutic instrument - Google Patents
Low frequency resonance biological electric therapeutic instrument Download PDFInfo
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- CN101164635B CN101164635B CN200610150631A CN200610150631A CN101164635B CN 101164635 B CN101164635 B CN 101164635B CN 200610150631 A CN200610150631 A CN 200610150631A CN 200610150631 A CN200610150631 A CN 200610150631A CN 101164635 B CN101164635 B CN 101164635B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/322—Electromedical brushes, combs, massage devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
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Abstract
The present invention discloses a low-frequency resonance bio-electric trerapeutic equipment, belonging to the fields of medical apparatus and instrument technology, face beautification and heath-caretechnology. It includes the following several portions: signal generator, signal frequency selector, gain control circuit, power amplifier, electric current sampling and full-wave rectification filter circuit and chip computer control circuit. Said invention provides the connection mode of all the above-mentioned all the portions, and its working principle and operation method.
Description
Technical field
The present invention relates to technical field of medical instruments, beauty treatment fields and healthcare field, relate in particular to a kind of low frequency resonance biological electric therapeutic instrument, be used for traditional Chinese traditional massage, massage treatment, electrotherapy and emerging bio electricity rehabilitation massage, be used for bio electricity abnormity disease, comprise various painful diseases (arthritis aches, the pain that spinal lesion causes, lumbago and skelalgia, pain in the shoulder and back, headache, neuropathic pain etc.), paralysis, deafness is presbyacusis especially, insomnia, beauty treatment, subhealth state, psychosis, drug rehabilitation, diabetes, hypertension, cancer, acquired immune deficiency syndrome (AIDS), difficult miscellaneous diseases such as hepatitis B.
Background technology
On medical apparatus and instruments, beauty treatment, the health care market, all electric therapeutic apparatus all be with output energy be treatment means, electrode is placed directly in the patient treats on one's body.The theoretical basis of these equipment is local excitations.Clinical trial certificate: the high-voltage pulse of moment can make the patient have significantly the fiber crops pain feel, and energy is difficult to go deep into focus, is difficult to along collective's meridians propagate, and frequency is all at intermediate frequency, can't allow the intrinsic bio electricity rehabilitation of body.Simultaneously, all electric therapeutic instrument, all unreceipted use it the time patient maximum current that can bear what are, how many times electric current surpasses, safety guard begins action (closing output), to protect patient's safety.Whether the low frequency resonance biological electric therapeutic instrument that has has safety guard all undeclared.
Summary of the invention
The objective of the invention is to stimulate based on the bio electricity theory of medicine, fully (non local stimulation), doctor's Wang traditional Chinese medical science bio electricity theory and doctor's Wang meridians hypothesis, with the intrinsic bio electricity of rehabilitation body is target, a kind of low frequency resonance biological electric therapeutic instrument is provided, output by low frequency resonance biological electric therapeutic instrument becomes the loop to treat with patient's figure, or conspires to create the loop by masseur's part limbs and patient and treat.The therapeutic instrument sine wave output, Energy distribution is even, and it is strong to go deep into the focus ability, and it is comfortable that the patient feels, and be provided with safety guard in therapeutic instrument.Low frequency resonance biological electric therapeutic instrument of the present invention, be that theoretical and bio electricity medicine principle combines with the Chinese medicine meridian theory according to doctor's Wang Yuling traditional Chinese medical science bio electricity, to pain, paralysis, etc. bio electricity abnormity disease produced above the doctor trained in Western medicine therapeutic effect that is beyond one's reach.Because individual difference is so output voltage has bigger range of accommodation.
For achieving the above object, technical solution of the present invention provides and comprises: signal generator 1, signal frequency selector 2, gain control circuit 3, power amplifier 4, current sampling and full-wave rectifier filter circuit 5 and single chip machine controlling circuit 7, described signal generator 1, signal frequency selector 2, gain control circuit 3, power amplifier 4 and current sampling and full-wave rectifier filter circuit 5 are linked in sequence, and the control end of signal frequency selector 2 and gain control circuit 3 is connected with single chip machine controlling circuit 7; Outfan at signal frequency selector 2 is connected with electrode, and this low frequency resonance biological electric therapeutic instrument also comprises:
One overcurrent and open loop protection circuit 6, be used to realize the power-off protection of this low frequency resonance biological electric therapeutic instrument under abnormal conditions, the input of described overcurrent and open loop protection circuit 6 is connected in the outfan of current sampling and full-wave rectifier filter circuit 5, and be connected with single chip machine controlling circuit 7 by voltage comparator, described overcurrent and open loop protection circuit 6 comprise current foldback circuit and open loop protection circuit, and described current foldback circuit comprises voltage comparator and digital regulation resistance; Described open loop protection circuit comprises voltage comparator and digital regulation resistance.
Be the overcurrent protection voltage of digital regulation resistance setting in the described current foldback circuit in advance; when the voltage of current sampling and full-wave rectifier filter circuit output during greater than described overcurrent protection voltage; voltage comparator in the described current foldback circuit will be exported a low level as interrupt signal to single chip machine controlling circuit, make digital regulation resistance be output as zero.
When entire circuit is in open-circuit condition, described voltage comparator in the described open loop protection circuit will send interrupt signal INT1 and give single chip machine controlling circuit 7, single chip machine controlling circuit 7 will reduce the electric current output intensity, if within a certain period of time, it is normal that circuit recovers, and then single chip machine controlling circuit 7 also is adjusted into the electric current output intensity normally; Otherwise single chip machine controlling circuit 7 main channels will become 0 pattern, 0 output, and INT1 will close interruption this moment.
Described signal generator 1 is a sine wave signal generator, comprise the sine-wave generator that produces 150 hertz, 100 hertz, 50 hertz sine waves respectively, be adjusted into the sine wave that virtual value equals 3V through separately potentiometer, deliver to the input of signal frequency selector 2 then.
Described 50 hertz of sine-wave generators also produce a square wave synchronous with sine wave, export to signal frequency selector 2.
Described signal frequency selector 2 comprises that eight select P1.0, P1.1, P1.2, the P1.3 mouth of a MOS switch, enumerator and single-chip microcomputer, is used under the control of single chip machine controlling circuit 7 sine wave of 3 kinds of frequencies receiving automatic signal generator 1 is selected and switched.
Described eight to select a MOS switch be a CD4051 chip, and its output signal is exported to gain control circuit 3 through behind isolated amplifier; Described enumerator is a 74HC161 chip, for hexadecimal can preset coincidence counter; Described single chip machine controlling circuit 7 is a single chip computer AT 89S51 chip.
Described gain control circuit 3 is the X9313W chip, is used to adjust amplitude of output voltage, exports to power amplifier 4 after the signal that is received from signal frequency selector 2 is adjusted.
Described power amplifier 4 is the TDA2030 chip, and running voltage is+16V to form complementary symmetrical OCL power amplifier and directly promote output transformer.
This low frequency resonance biological electric therapeutic instrument further comprises power supply 8, LED digital display circuit 9, keyboard 10 and pedal switch 11; Described LED digital display circuit 9 is connected in the display panel interface P4 of single chip machine controlling circuit 7, and described keyboard 10 is connected in the keypad interface P6 of single chip machine controlling circuit 7, and described pedal switch 11 is connected in the pedal switch interface P5 of single chip machine controlling circuit 7.
Described power supply comprises transformator, rectifier bridge, filter capacitor and 7812,7912,7805 chips, and being used to provides:
± 16V brute supply uses for power amplifier;
± 12V regulated power supply uses for operational amplifier, voltage comparator;
+ 5V regulated power supply uses for single-chip microcomputer and digital circuit.
Described low frequency resonance biological electric therapeutic instrument, when it uses, be connected into the polyphone loop, one electrode of low frequency resonance biological electric therapeutic instrument (excursion 1-100) contact patient's two foot's Yongquan acupoint (and on other acupuncture point), other acupuncture point conducting massage treatment of another electrode (1-100 electrode) contact patient, or masseur's hand, the masseur contacts patient body with hands, the conducting massage treatment.
Described low frequency resonance biological electric therapeutic instrument, its described current foldback circuit, when head massage, its electric current is little, and when health or extremity massage, its electric current can increase.
Low frequency resonance biological electric therapeutic instrument of the present invention is compared with other therapeutic instrument, and its advantage is:
1, the voltage current waveform of this instrument output is the square-wave pulse of AC sine wave rather than general instrument output;
2, this instrument has reliable safety protective circuit, when output current the time can be closed in moment greater than setting value.
3, the exportable suitable bionical electric current of low frequency resonance biological electric therapeutic instrument is used for rehabilitation. and it can carry out sequencing control to frequency, intensity and the treatment time etc. of output current easily, and has designed effective overcurrent safety protective circuit and open loop protection circuit
Description of drawings
Fig. 1 is a low frequency resonance biological electric therapeutic instrument circuit structure block diagram of the present invention;
Fig. 2 is the circuit diagram of low frequency resonance biological electric therapeutic instrument LED digital display circuit of the present invention, pedal switch and keyboard;
Fig. 3 is the sketch map of low frequency resonance biological electric therapeutic instrument guidance panel of the present invention;
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As shown in Figure 1; Fig. 1 is a low frequency resonance biological electric therapeutic instrument circuit structure block diagram of the present invention, and this low frequency resonance biological electric therapeutic instrument comprises signal generator 1, signal frequency selector 2, gain control circuit 3, power amplifier 4, current sampling and full-wave rectifier filter circuit 5, overcurrent and open loop protection circuit 6, single chip machine controlling circuit 7, power supply 8, LED digital display circuit 9, keyboard 10 and pedal switch 11.Wherein, the circuit diagram of LED digital display circuit 9, keyboard 10 and pedal switch 11 as shown in Figure 2, Fig. 2 is the circuit diagram of low frequency resonance biological electric therapeutic instrument LED digital display circuit of the present invention, pedal switch and keyboard.
Below respectively each component units of above-mentioned composition low frequency resonance biological electric therapeutic instrument is elaborated.
1, signal generator
2, signal frequency selector
Signal frequency selector 2 comprises that eight select P1.0, P1.1, P1.2, the P1.3 mouth of a MOS switch, enumerator and single-chip microcomputer, is used under the control of single chip machine controlling circuit 7 sine wave of 3 kinds of frequencies receiving automatic signal generator 1 is selected and switched.Described eight to select a MOS switch be a CD4051 chip, and its output signal is exported to gain control circuit 3 through behind isolated amplifier; Described enumerator is a 74HC161 chip, for hexadecimal can preset coincidence counter; Described single chip machine controlling circuit 7 is a single chip computer AT 89S51 chip.
Sine wave signal is sent to first amplifier through after the selection of frequency selective switch, delivers to the Y4 input of analog switch then again.When frequency selective switch was positioned at the 2nd grade or the 3rd grade, sine wave signal was not done any processing and is directly delivered to the com end and output to the 2nd amplifier then in analog switch, and this moment, signal frequency was 50Hz or 100Hz.When frequency switching was positioned at the 1st grade, the reset signal of enumerator was disengaged, and began to begin counting with the 50Hz square wave as count pulse.The binary output signal of enumerator is used for controlling the input Y4 of analog switch, Y5, Y6, the conversion successively between the Y7, per 4 clocks conversion one time.Wherein having only the Y4 end is sine wave signal, and all the other 3 inputs are 0V.Can obtain the sine wave signal at intermittence of 12.5Hz like this at the com end.
The effect of signal frequency selector 2 is under the control of single-chip microcomputer the sine wave of various frequencies to be selected and switched. and it selects P1.0, P1.1, P1.2, the P1.3 mouth of MOS switch (CD4051) sum counter and single-chip microcomputer to form by eight. and enumerator is the 74HC161 chip, it is that hexadecimal can preset coincidence counter. they and single-chip microcomputer cooperate, pattern is in accordance with regulations changed 50Hz, 100Hz, 150Hz AC signal and 0V, has 7 kinds of patterns.
Wherein 4 kinds of simple modes such as following table:
Annotate: the P1.3 mouth is delivered to the end of packing into of enumerator after through a nor gate.When P1.3=1, the outfan of enumerator equals input, i.e. the output state of enumerator do not change because of the arrival of clock (fixing output).Above-mentioned 4 patterns all belong to this situation.
Below 3 kinds of patterns be P1.3=0, timer enters count status.
Mode 3:
When last table was seen the 3rd pulse, timer turned back to original state again, 2 beat circulation primary.The interruption waveform that its output is is first-harmonic with 50 hertz of sine waves, we claim it to be 25 hertz and are interrupted sine wave.
Pattern 2:
Pattern 2 is 3 beat circulation primary, and we claim it to be 17 hertz and are interrupted sine wave.
Pattern 1:
Following table combines above-mentioned 7 patterns:
" eight select a MOS switch " behind the signal process isolated amplifier (first amplifier) of output, to deliver to the control portion of gain branch.
3, gain control circuit
Gain control circuit 3 is the X9313W chip, is used to adjust amplitude of output voltage, exports to power amplifier 4 after the signal that is received from signal frequency selector 2 is adjusted.
Control portion of gain divides i.e. first digital regulation resistance, and its effect is to adjust output voltage amplitude.The effect of digital regulation resistance and traditional potentiometer are just the same, and we adopt the X9313W chip, inner 32 taps, 10K ohm.The Vh termination is subjected to the signal from first amplifier, VL ground connection, and the output of Vw end is through the signal of adjusting range.After start powers on, Vw=0V.Under the control of single-chip microcomputer, when U/D=1, each INC pulse will make the output voltage of Vw rise one grade, and 31 grades arrive maximum.When U/D=0, each INC pulse will make the output voltage of Vw descend one grade, and maximum 31 grades arrive minima.Signal through the gain regulation and control is sent to second amplifier.
4, power amplifier
Power amplifier 4 is the TDA2030 chip, and running voltage is+16V to form complementary symmetry (OCL) power amplifier and directly promote output transformer.
5, current sampling and full-wave rectifier filter circuit
Current sampling resistor of series connection in the output loop of output transformer, this signal is exported a tributary voltage signal that is proportional to output current value after rectification.The output current of output transformer is 30 milliamperes to the maximum.One 51 ohmage is converted to current signal voltage signal and delivers to full-wave rectifier filter circuit, the d. c. voltage signal of an analog current of its output, 0.1V=1mA.This signal is sent to second voltage comparator and tertiary voltage comparator then.
6, overcurrent and open loop protection circuit
Overcurrent and open loop protection circuit 6 are used to realize the power-off protection of this low frequency resonance biological electric therapeutic instrument under abnormal conditions; the input of described overcurrent and open loop protection circuit 6 is connected in the outfan of current sampling and full-wave rectifier filter circuit 5, and the voltage comparator outfan is connected with single chip machine controlling circuit 7.
Described overcurrent and open loop protection circuit 6 comprise current foldback circuit and open loop protection circuit.
Described current foldback circuit comprises a voltage comparator and a digital regulation resistance; set an overcurrent protection voltage for digital regulation resistance in advance; when the voltage of current sampling and full-wave rectifier filter circuit output during greater than described overcurrent protection voltage; voltage comparator will be exported a low level as interrupt signal to single chip machine controlling circuit, make digital regulation resistance be output as zero.
The effect of described current foldback circuit is to give second digital regulation resistance a predetermined overcurrent protection value (magnitude of voltage) by single-chip microcomputer; when the voltage of full-wave rectifier filter circuit output during greater than the predetermined value of second digital regulation resistance; second voltage comparator will send a low level and give single-chip microcomputer as interrupt signal INT0; single-chip microcomputer sends " 0 pattern " instruction again and gives frequency selector; making main channel signal is 0V; be output as zero thereby make, finally protected patient's safety.Instrument will send chimes of doom this moment, with warning patient and masseur.Second digital regulation resistance also adopts the X9313W chip, its Vh termination+3.2V voltage, and each INC pulse will make the Vw end be sent to the change in voltage 0.1V of second voltage comparator.Suppose that our predetermined overcurrent protection value is 20 milliamperes, single-chip microcomputer is made as 2.0V with Vw.Therapeutic instrument begins output services, and when output current surpasses 20 MAHs, the d. c. voltage signal of analog output current will be greater than 2.0V, and at this moment second voltage comparator is delivered to single-chip microcomputer with output low level as INT0, and output voltage is changed to 0V the most at last.
Described open loop protection circuit comprises a voltage comparator and a digital regulation resistance, when entire circuit is in open-circuit condition, described voltage comparator will send interrupt signal INT1 and give single chip machine controlling circuit 7, single chip machine controlling circuit 7 will reduce the electric current output intensity, if within a certain period of time, it is normal that circuit recovers, and then single chip machine controlling circuit 7 also is adjusted into the electric current output intensity normally; Otherwise single chip machine controlling circuit 7 main channels will become 0 pattern, 0 output, and INT1 will close interruption this moment.
If the effect of described open loop protection circuit is therapeutic electrode accidental on one's body the patient in therapeutic process, instrument will make output voltage drop to a very little value, meet accident preventing.We are transferred to 0.1V with potentiometer RT5, and after therapeutic instrument begins output services, and output intensity reaches after the certain value (being assumed to be the first digital regulation resistance position greater than 5), will allow INT1 to interrupt.In therapeutic process, when output current less than 1 MAH, we think that promptly it is opened a way.The tertiary voltage comparator will send the INT1 interrupt signal to single-chip microcomputer this moment, and single-chip microcomputer will be adjusted first digital regulation resistance (being assumed to be 6), make output intensity drop to a smaller value; In 10 seconds, if electrode connects again, then first digital regulation resistance progressively returns to former definite value again, continues treatment; If 10 second rear electrode also do not connect, then the main channel will become 0 pattern, 0 output will be closed interruption at INT1 this moment.
7, single chip machine controlling circuit
Single chip machine controlling circuit 7 adopts single chip computer AT 89S51 chip; it is the control section of whole low frequency resonance biological electric therapeutic instrument; its input is connected with signal frequency selector 2, gain control circuit 3 and the outfan of overcurrent with open loop protection circuit 6 respectively, the signal of received signal frequency selector 2, gain control circuit 3 and overcurrent and open loop protection circuit 6 inputs.
In addition, single chip machine controlling circuit 7 also comprises display panel interface P4, pedal switch interface P5 and keypad interface P6, the LED digital display circuit is connected with single chip machine controlling circuit 7 by display panel interface P4, the pedal switch is connected with single chip machine controlling circuit 7 by pedal switch interface P5, and keyboard is connected with single chip machine controlling circuit 7 by keypad interface P6.
8, power supply
Power supply 8 is made up of transformator, rectifier bridge, filter capacitor and 7812,7912, chips such as 7805.Input voltage is 220V, exports as follows:
± 16V brute supply uses for power amplifier;
± 12V regulated power supply uses for operational amplifier, voltage comparator;
+ 5V regulated power supply uses for single-chip microcomputer and digital circuit.
9, LED digital display circuit
LED digital display circuit 9 is connected in the display panel interface P4 of single chip machine controlling circuit 7, and totally 6 bit digital display, single-chip microcomputer are serial output, and string and conversion chip are 74HC595.Serial data is seven sections demonstration symbols through BCD decoding.LED is a common cathode, green, and static the demonstration, o'clock light data=1.
P0.0: serial data, every string 6X8=48 position;
P0.1: the serial shift clock, every Bits Serial data are sent 1 pulse;
P0.2: and the line output clock, 1 pulse of every string data (48) output.
1# display: display mode, totally 6 kinds of patterns, 0,1,2,3,4,5,6.
The 2# display: show the overcurrent protection value, be divided into 6 grades, every grade equals 5 milliamperes.
3#4# display: show the working time, unit minute.
5#6# display: show output intensity to be set, totally 32 grades.
1# to 5# display does not have arithmetic point and shows, the arithmetic point of #6 display shows as output state and uses.
10, keyboard
Keyboard 10 is connected in the keypad interface P6 of single chip machine controlling circuit 7, and keypad interface P6 directly receives on the single-chip processor i/o mouth, and totally 6, the inquiry working method.Require to eliminate shake with software delay 50ms.Button is defined as follows:
1# key-mode selecting key: pre-selected pattern.
2# key-protection value setting key: predetermined protection value.
3# key-time is provided with key: preset treatment time.
4# key-intensity adds key: increase output intensity.
5# key-intensity subtracts key: reduce output intensity.
6# key-startup/stop key: by next time, instrument begins output; Press once, instrument stops output again.
1# key, 2# key, 3# key work before instrument begins output services, and be inoperative behind the beginning output services.
4#, 5#, 6# key work at any time.
The effect of foot switch is equal to 4# and 5# key.
11, pedal switch
More than each parts connect the back and form low frequency resonance biological electric therapeutic instrument circuit of the present invention, place the shell of low frequency resonance biological electric therapeutic instrument.
See that Fig. 3 is the sketch map of low frequency resonance biological electric therapeutic instrument guidance panel of the present invention.
Using method of the present invention is as follows:
1, opens the instrument case lid, two electrode wires are inserted on the corresponding socket.On two black battery lead plates, respectively put an absorbent cotton that sprayed water, and be fixed in patient's sole " Yongquan acupoint " and locate; On red battery lead plate, also put the absorbent cotton that sprayed water and place masseur's hand.
2, turn on the power switch.
3, according to patient's symptom needs, by " frequency selective switch " selected operating frequency.
4, according to patient's disease sites situation, by the selected overcurrent protection value of " setting of protection value " knob.The overcurrent protection value is 30mA to the maximum.
5, according to patient's disease sites situation, by " strength control " knob preset output voltage intensity.Actual current value when milliammeter shows massage.
If 6 masseurs or patient skin are too dry, can be in advance spraying water on hand the masseur begins massage operation after moistening again.The size of massage electric current depends on:
The height of a output voltage;
The size of b patient and masseur and battery lead plate contact area and dynamics;
The size of c masseur and patient skin contact area and push dynamics.
The electric current adjustment should use " strength control " knob to finish on a large scale.
7, the massage electric current to sensitive parts such as heads is difficult too big, generally surpasses 5mA.At this moment for the sake of assurance, the protection value just can be set in 5mA.When massaging electric current greater than 5mA, holding circuit can be closed output immediately, and the red alarm display lamp can be bright simultaneously, and the prompting instrument is in guard mode.At this moment the masseur should disengage with the patient immediately, and with power-off.Continue massage as need, can continue massage after turning on the power switch.Same reason when other positions are massaged, can be set the safeguard protection value according to actual needs.
Above-described specific embodiment; purpose, technical scheme and beneficial effect to invention further describe; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. low frequency resonance biological electric therapeutic instrument, comprise: signal generator (1), signal frequency selector (2), gain control circuit (3), power amplifier (4), current sampling and full-wave rectifier filter circuit (5) and single chip machine controlling circuit (7), described signal generator (1), signal frequency selector (2), gain control circuit (3), power amplifier (4) and current sampling and full-wave rectifier filter circuit (5) are linked in sequence, and the control end of signal frequency selector (2) and gain control circuit (3) is connected with single chip machine controlling circuit (7); Outfan at signal frequency selector (2) is connected with electrode, it is characterized in that, this low frequency resonance biological electric therapeutic instrument also comprises:
One overcurrent and open loop protection circuit (6), be used to realize the power-off protection of this low frequency resonance biological electric therapeutic instrument under abnormal conditions, the input of described overcurrent and open loop protection circuit (6) is connected in the outfan of current sampling and full-wave rectifier filter circuit (5), and is connected by the input of voltage comparator with single chip machine controlling circuit (7);
Described overcurrent and open loop protection circuit (6) comprise current foldback circuit and open loop protection circuit, and described current foldback circuit comprises voltage comparator and digital regulation resistance; Described open loop protection circuit comprises voltage comparator and digital regulation resistance.
2. low frequency resonance biological electric therapeutic instrument according to claim 1 is characterized in that,
Be the overcurrent protection voltage of digital regulation resistance setting in the described current foldback circuit in advance, when the voltage of current sampling and full-wave rectifier filter circuit output during greater than described overcurrent protection voltage, voltage comparator in the described current foldback circuit will be exported a low level as interrupt signal to single chip machine controlling circuit, make digital regulation resistance be output as zero;
When entire circuit is in open-circuit condition, described voltage comparator in the described open loop protection circuit will send interrupt signal INT1 and give single chip machine controlling circuit (7), single chip machine controlling circuit (7) will reduce the electric current output intensity, if within a certain period of time, it is normal that circuit recovers, and then single chip machine controlling circuit (7) also is adjusted into the electric current output intensity normally; Otherwise single chip machine controlling circuit (7) main channel will become 0 pattern, 0 output, and INT1 will close interruption this moment.
3. low frequency resonance biological electric therapeutic instrument according to claim 1, it is characterized in that, described signal generator (1) is a sine wave signal generator, described sine wave signal generator comprises the sine-wave generator that produces 150 hertz, 100 hertz, 50 hertz sine waves respectively, be adjusted into the sine wave that virtual value equals 3V through separately potentiometer, deliver to the input of signal frequency selector (2) then.
4. low frequency resonance biological electric therapeutic instrument according to claim 3 is characterized in that, described 50 hertz of sine-wave generators also produce a square wave synchronous with sine wave, export to signal frequency selector (2).
5. low frequency resonance biological electric therapeutic instrument according to claim 1, it is characterized in that, described signal frequency selector (2) comprises that eight select P1.0, P1.1, P1.2, the P1.3 mouth of a MOS switch, enumerator and single-chip microcomputer, is used under the control of single chip machine controlling circuit (7) sine wave of 3 kinds of frequencies receiving automatic signal generator (1) is selected and switched.
6. low frequency resonance biological electric therapeutic instrument according to claim 5 is characterized in that,
Described eight to select a MOS switch be a CD4051 chip, and its output signal is exported to gain control circuit (3) through behind isolated amplifier;
Described enumerator is a 74HC161 chip, for hexadecimal can preset coincidence counter;
Described single chip machine controlling circuit (7) is a single chip computer AT 89S51 chip.
7. low frequency resonance biological electric therapeutic instrument according to claim 1, it is characterized in that, described gain control circuit (3) is the X9313W chip, is used to adjust amplitude of output voltage, exports to power amplifier (4) after the signal that will be received from signal frequency selector (2) is adjusted.
8. low frequency resonance biological electric therapeutic instrument according to claim 1 is characterized in that, described power amplifier (4) is the TDA2030 chip, and running voltage is+16V to form complementary symmetrical OCL power amplifier and directly promote output transformer.
9. low frequency resonance biological electric therapeutic instrument according to claim 1 is characterized in that, this low frequency resonance biological electric therapeutic instrument further comprises power supply (8), LED digital display circuit (9), keyboard (10) and pedal switch (11);
Described LED digital display circuit (9) is connected in the display panel interface P4 of single chip machine controlling circuit (7), described keyboard (10) is connected in the keypad interface P6 of single chip machine controlling circuit (7), and described pedal switch (11) is connected in the pedal switch interface P5 of single chip machine controlling circuit (7).
10. low frequency resonance biological electric therapeutic instrument according to claim 9 is characterized in that, described power supply comprises transformator, rectifier bridge, filter capacitor and 7812,7912,7805 chips, and being used to provides:
± 16V brute supply uses for power amplifier;
± 12V regulated power supply uses for operational amplifier, voltage comparator;
+ 5V regulated power supply uses for single-chip microcomputer and digital circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610150631A CN101164635B (en) | 2006-10-20 | 2006-10-20 | Low frequency resonance biological electric therapeutic instrument |
| PCT/CN2007/070676 WO2008046332A1 (en) | 2006-10-20 | 2007-09-12 | Low-frequency resonance biology electrical therapeutic apparatus |
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| CN200610150631A CN101164635B (en) | 2006-10-20 | 2006-10-20 | Low frequency resonance biological electric therapeutic instrument |
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| CN101164635B true CN101164635B (en) | 2010-05-12 |
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| CN105107087A (en) * | 2015-08-26 | 2015-12-02 | 魏红月 | Electric wave therapeutic instrument |
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| CN2655942Y (en) * | 2003-09-19 | 2004-11-17 | 宜兴市科教仪器研究所 | Improved electrotherapy equipment |
| CN201073508Y (en) * | 2006-09-27 | 2008-06-18 | 王玉玲 | Bioelectric therapeutical instrument |
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