CN104623802A - Treatment waveform generation device and medium-frequency electrotherapy therapeutic apparatus - Google Patents
Treatment waveform generation device and medium-frequency electrotherapy therapeutic apparatus Download PDFInfo
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- CN104623802A CN104623802A CN201510052687.8A CN201510052687A CN104623802A CN 104623802 A CN104623802 A CN 104623802A CN 201510052687 A CN201510052687 A CN 201510052687A CN 104623802 A CN104623802 A CN 104623802A
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Abstract
The invention discloses a treatment waveform generation device and a medium-frequency electrotherapy therapeutic apparatus. The medium-frequency electrotherapy therapeutic apparatus comprises a microcomputer, a first SPI (Serial Peripheral Interface) circuit, a second SPI circuit and the treatment waveform generation device, wherein the treatment waveform generation device is connected with the microcomputer, the first SPI circuit and the second SPI circuit; an input regulating command is converted through the first SPI circuit, so as to output adjusting signals for adjusting the treatment waveform intensity output by the treatment waveform generation device; the second SPI circuit converts the input regulating command, so as to output SPI codes for adjusting the magnitude of positive and negative voltages of a treatment waveform; therefore, parameters of the treatment waveform can be randomly adjusted; furthermore, the microcontroller can be used for identifying a lead-fail state by judging the magnitude of the voltages of the treatment waveform, and the current of the treatment waveform can be calculated to obtain real-time current flowing through a human body and fed back; the treatment current and the lead-fail connection state can be monitored in real time.
Description
Technical field
The present invention relates to rehabilitation instrument field, in particular one treats Waveform generating apparatus and medium frequency electric stimulation therapeutic instrument.
Background technology
Mid-frequency treatment device mainly realizes the treatment to patient by the change for the treatment of waveform parameter.And existing mid-frequency treatment device is all by a kind of or limited several treatment waveforms of circuit realiration substantially, circuit structure will be made so complicated, thus cause the shortcomings such as circuit cost is high, treatment stability of waveform is poor, treatment waveform parameter cannot regulate.
In addition, existing mid-frequency treatment device adopts the voltage way of output mostly, when exporting different treatment waveforms and treating patient, the position of putting due to electrode is different, distance between electrode is different, human body impedance can change, thus cause the voltage waveform really acting on human body to have sizable deviation with the actual treatment waveform exported, so just cannot reach initial therapeutic effect.And about in the document of mid-frequency treatment device and patent, rarely relate to treatment current detecting and lead-fail detector detects, therefore, in use frequently therapeutic instrument time, to increase suddenly due to electric current or electrode putting position is incorrect that patient often can be caused uncomfortable.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, there is provided one to treat Waveform generating apparatus and medium frequency electric stimulation therapeutic instrument, being intended to solve existing mid-frequency treatment device treatment waveform parameter cannot regulate, and can not detect the problem for the treatment of electric current lead-fail detector.
The technical scheme that technical solution problem of the present invention adopts is as follows:
One treats Waveform generating apparatus, comprise and the first input waveform is carried out processing the first waveform control module exporting A group treatment waveform, and carry out processing the second waveform control module exporting B group treatment waveform to the second input waveform, wherein, described first waveform control module comprises regulation unit, conversion amplifying unit and detecting unit, and described regulation unit, conversion amplifying unit, detecting unit connect successively;
Described regulation unit is used for carrying out parameter adjustment and intensity adjustments to the first input waveform, and convert the treatment waveform of positive/negative-pressure to, described conversion amplifying unit carries out exporting A group treatment waveform after electric current conversion and amplitude are amplified to described treatment waveform, and detecting unit detects A group and treats the electric current of waveform and voltage and export.
In described treatment Waveform generating apparatus, described regulation unit comprises:
D/A converting circuit, generates the first treatment waveform for carrying out digital-to-analogue conversion to the first input waveform;
Low-pass filter circuit, for carrying out Filtering Processing to described first treatment waveform, obtains the second treatment waveform;
Dimmer circuit, for the voltage strength of the adjustment signal adjustment second treatment waveform according to input, exports the 3rd treatment waveform;
Center line regulating circuit, for generation of a center line;
Subtraction amplification circuit, for the 3rd of positive waveform the treatment waveform is deducted center line and amplifies, obtains the 4th treatment waveform of positive/negative-pressure;
Described D/A converting circuit, low-pass filter circuit, dimmer circuit, subtraction amplification circuit connect successively, and described center line regulating circuit connects subtraction amplification circuit, and described subtraction amplification circuit connects conversion amplifying unit.
In described treatment Waveform generating apparatus, described conversion amplifying unit comprises:
Voltage-current converter circuit, for by the 4th of voltage-type the treatment waveform transformation being the 5th treatment waveform of current type;
Transformator amplifying circuit, obtains A group treatment waveform for amplifying the 5th treatment waveform amplitude of carrying out;
Described voltage-current converter circuit connects subtraction amplification circuit and transformator amplifying circuit, and described transformator amplifying circuit connects detecting unit.
In described treatment Waveform generating apparatus, described detecting unit comprises:
Come off testing circuit, for detecting the voltage change conditions of the 6th treatment waveform;
Current detection circuit, for detecting the curent change state of the 6th treatment waveform;
Analog to digital conversion circuit, for exporting the voltage of the 6th treatment waveform, electric current after carrying out analog digital conversion;
Described testing circuit connection transformer amplifying circuit and the analog to digital conversion circuit of coming off, described current detection circuit connection transformer amplifying circuit and analog to digital conversion circuit.
In described treatment Waveform generating apparatus, described low-pass filter circuit comprises the first operational amplifier, the second operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity; The reverse input end of described first operational amplifier is connected the outfan of the first operational amplifier, is also connected one end of the first resistance by the first electric capacity, the positive input of the first operational amplifier by the second resistance connect the first resistance one end, also by the second capacity earth, the other end of described first resistance is by the outfan of the 3rd resistance linking number analog conversion circuit, also by the 3rd capacity earth; The outfan of described first operational amplifier connects the positive input of the second operational amplifier, the reverse input end of the second operational amplifier connects the outfan of the second operational amplifier and one end of the 4th resistance, the other end bonding strength regulating circuit of described 4th resistance, also by the 4th capacity earth.
In described treatment Waveform generating apparatus, described dimmer circuit comprises the first digital regulation resistance, the 5th resistance and the 5th electric capacity; 1st end of described first digital regulation resistance connects one end of the 5th resistance by the 5th electric capacity, the other end of the 5th resistance connects the other end of the 4th resistance, 2nd end of the first digital regulation resistance connects a SPI circuit, and the 3rd end of the first digital regulation resistance connects subtraction amplification circuit.
In described treatment Waveform generating apparatus, described center line regulating circuit comprises the second digital regulation resistance, 1st end of described second digital regulation resistance connects power end, and the 2nd end of the second digital regulation resistance connects the 2nd SPI circuit, and the 3rd end of the second digital regulation resistance connects subtraction amplification circuit.
In described treatment Waveform generating apparatus, described subtraction amplification circuit comprises the 3rd operational amplifier, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance; The positive input of described 3rd operational amplifier connects the 3rd end of the first digital regulation resistance by the 6th resistance, the positive input of the 3rd operational amplifier also connects the outfan of the 3rd operational amplifier by the 7th resistance, the negative input of the 3rd operational amplifier by the 8th resistance connect the second digital regulation resistance the 3rd end, also by the 9th resistance eutral grounding; The outfan of the 3rd operational amplifier connects voltage-current converter circuit.
In described treatment Waveform generating apparatus, described voltage-current converter circuit comprises four-operational amplifier, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance and the 14 resistance; The positive input of described four-operational amplifier connects one end of the tenth resistance and one end of the 11 resistance, the other end of described tenth resistance connects the outfan of the 3rd operational amplifier, the other end of the 11 resistance connects one end and the transformator amplifying circuit of the 12 resistance, the other end of the 12 resistance connects the outfan of four-operational amplifier, and the reverse input end of four-operational amplifier is by the 13 resistance eutral grounding, the outfan also being connected four-operational amplifier by the 14 resistance.
In described treatment Waveform generating apparatus, described transformator amplifying circuit comprises transformator and the 15 resistance, one end of described primary winding connects the other end of the 11 resistance and one end of the 12 resistance, the other end ground connection of primary winding, one end of transformer secondary output winding connects come off testing circuit and electrode slice A, the other end of transformer secondary output winding connects one end of the 15 resistance, and the other end of the 15 resistance connects current detection circuit and electrode slice B.
In described treatment Waveform generating apparatus, described in the testing circuit that comes off comprise the first diode, the second diode, the 3rd diode, the 16 resistance, the 17 resistance and the 18 resistance; One end of the positive pole connection transformer secondary windings of described first diode, the negative pole of the first diode connects one end of the 17 resistance and one end of the 18 resistance by the 16 resistance, the other end ground connection of described 17 resistance, the other end of the 18 resistance connects the positive pole of the second diode, the negative pole of the 3rd diode and analog to digital conversion circuit, the negative pole of described second diode connects power end, the plus earth of the 3rd diode.
In described treatment Waveform generating apparatus, described current detection circuit comprises the 5th operational amplifier, the 6th operational amplifier, the 4th diode, the 19 resistance, the 20 resistance, the 21 resistance and the 22 resistance, the reverse input end of described 5th operational amplifier connects the negative pole of the 4th diode by the 19 resistance, one end of 20 resistance and one end of the 21 resistance, the plus earth of described 4th diode, the other end of the 20 resistance connects the outfan of the 5th operational amplifier, the other end of the 21 resistance connects the other end and the electrode slice B of the 15 resistance, the positive input of described 5th operational amplifier is by the 22 resistance eutral grounding, the outfan of the 5th operational amplifier connects the positive input of the 6th operational amplifier, the reverse input end of the 6th operational amplifier connects outfan and the analog to digital conversion circuit of the 6th operational amplifier.
A kind of medium frequency electric stimulation therapeutic instrument, comprise microprocessor, a SPI circuit and the 2nd SPI circuit, it also comprises described treatment Waveform generating apparatus; Described treatment Waveform generating apparatus connects microprocessor, a SPI circuit and the 2nd SPI circuit;
A described SPI circuit is used for changing the regulating command of input, exports the intensity of the treatment waveform that adjustment Signal Regulation treatment Waveform generating apparatus exports; 2nd SPI circuit is used for changing the control instruction of input, exports the positive/negative-pressure size for the treatment of waveform described in SPI coding and regulating; The voltage swing of described microcontroller to described treatment waveform carries out judgement to be carried out identifiable design and goes out lead-fail detector state, also calculates to the size of current for the treatment of waveform the real-time current that flows through human body and feeds back.
Compared to prior art, the invention provides one and treat Waveform generating apparatus and medium frequency electric stimulation therapeutic instrument, by a SPI circuit, the regulating command that user inputs is changed, export the intensity of the treatment waveform that adjustment Signal Regulation treatment Waveform generating apparatus exports; 2nd SPI circuit is changed the control instruction that user inputs, and exports the positive/negative-pressure size for the treatment of waveform described in SPI coding and regulating; Any adjustment to treatment waveform parameter can be realized like this; Further, the voltage swing of microcontroller to described treatment waveform carries out judgement to be carried out identifiable design and goes out lead-fail detector state, also calculates to the size of current for the treatment of waveform the real-time current that flows through human body and feeds back; Reach the object of Real-Time Monitoring treatment electric current and lead-fail detector connection status.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of medium frequency electric stimulation therapeutic instrument Application Example provided by the invention.
Fig. 2 is the circuit diagram of low-pass filter circuit in treatment Waveform generating apparatus provided by the invention.
Fig. 3 is the circuit diagram of dimmer circuit in treatment Waveform generating apparatus provided by the invention.
Fig. 4 is the circuit diagram of center line regulating circuit in treatment Waveform generating apparatus provided by the invention.
Fig. 5 is the circuit diagram of subtraction amplification circuit in treatment Waveform generating apparatus provided by the invention.
Fig. 6 is the circuit diagram of voltage-current converter circuit and transformator amplifying circuit in treatment Waveform generating apparatus provided by the invention.
Fig. 7 is the circuit diagram of testing circuit of coming off in treatment Waveform generating apparatus provided by the invention.
Fig. 8 is the circuit diagram of current detection circuit Application Example in treatment Waveform generating apparatus provided by the invention.
Detailed description of the invention
The invention provides one and treat Waveform generating apparatus and medium frequency electric stimulation therapeutic instrument, the treatment waveform that two groups of output waveform parameters can regulate arbitrarily can be produced, functional electric stimulation treatment is carried out to patient; All right Real-Time Monitoring effect treatment electric current on a patient body, foundation is provided for regulating waveform parameter by feedback treating electric current, size according to treatment electric current carries out lead-fail detector judgement, achieves the intelligent function regulating electronic stimulation intensity and lead-fail detector to detect.For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Be divided into A, B two groups based on general treatment waveform, and the waveform of two groups is symmetrical.For this reason, treatment Waveform generating apparatus provided by the invention comprises the first waveform control module and the second waveform control module, and the circuit structure of these two Waveform Control modules is identical.First waveform control module exports A group treatment waveform after carrying out relevant treatment to the first input waveform.Second waveform control module exports B group treatment waveform after carrying out relevant treatment to the second input waveform.Described medium frequency electric stimulation therapeutic instrument comprises the first described waveform control module, the second waveform control module, a SPI circuit, the 2nd SPI circuit and microcontroller.
For the first waveform control module, refer to Fig. 1, described first waveform control module comprises regulation unit 10, conversion amplifying unit 20 and detecting unit 30.Described regulation unit 10, conversion amplifying unit 20, detecting unit 30 connect successively.Described regulation unit 10 for carrying out parameter adjustment and intensity adjustments to the first input waveform, and converts the treatment waveform of positive/negative-pressure to.Export A group treatment waveform after conversion amplifying unit 20 carries out electric current conversion and power amplification to described treatment waveform, detecting unit 30 detects electric current and the voltage of A group treatment waveform, and is transferred to microcontroller.Microcontroller calculates actual current according to described galvanometer and feeds back to user, so that user adjusts the electric current of A group treatment waveform.Microcontroller also judges the lead-fail detector state of electrode slice and human body according to the size of described voltage.
A described SPI circuit, the 2nd SPI circuit all connect regulation unit 10.One SPI circuit is used for changing the regulating command of user's input, exports one section of adjustment signal to the foundation of regulation unit 10 as intensity adjustments.The SPI that 2nd SPI circuit exports encodes to regulation unit 10, as the adjustment foundation of positive/negative-pressure size.
Wherein, described regulation unit 10 comprises D/A converting circuit 101, low-pass filter circuit 102, dimmer circuit 103, center line regulating circuit 104 and subtraction amplification circuit 105.Described conversion amplifying unit 20 comprises voltage-current converter circuit 201 and transformator amplifying circuit 202.Described detecting unit 30 comprises the testing circuit 301 that comes off, current detection circuit 302 and analog to digital conversion circuit 303.Described D/A converting circuit 101, low-pass filter circuit 102, dimmer circuit 103, subtraction amplification circuit 105 connect successively, described center line regulating circuit 104 connects subtraction amplification circuit 105, described subtraction amplification circuit 105, voltage-current converter circuit 201, transformator amplifying circuit 202 connect successively, described testing circuit 301 connection transformer amplifying circuit 202 and the analog to digital conversion circuit 303 of coming off, described current detection circuit 302 connection transformer amplifying circuit 202 and analog to digital conversion circuit 303.
Described first input waveform is a kind of discrete signal of binary digit amount form, needs first by D/A converting circuit 101, this first input waveform to be carried out digital-to-analogue conversion and generates the first treatment waveform TP1.The analog quantity that described first treatment waveform is is benchmark with standard volume (or reference quantity).In the present embodiment, artificially input according to Treatment need based on the first input waveform, therefore, the parameter of the first input waveform, as frequency, waveform shape etc. can regulate.
Because the first treatment waveform TP1 by producing after digital-to-analogue conversion contains abundant high fdrequency component, therefore needing to carry out Filtering Processing by low-pass filter circuit 102, obtaining the second treatment waveform TP2.The voltage strength of the adjustment signal adjustment second treatment waveform that described dimmer circuit 103 inputs according to a SPI circuit, exports the 3rd treatment waveform TP3.
The first input waveform of positive direction can only be exported based on microcontroller, cause the first treatment waveform TP1, the second treatment waveform TP2, the 3rd treatment waveform TP3 to be positive waveform.And general action is positive negative wave in the treatment waveform of patient, for this reason, the present embodiment also produces a center line VT by center line regulating circuit, then makes the 3rd of positive waveform the treatment waveform TP3 deduct center line VT and amplify by subtraction amplification circuit 105, can obtain the 4th treatment waveform TP4 of positive/negative-pressure.Wherein, the SPI coding that the voltage swing of center line VT is inputted by the 2nd SPI circuit adjusts.
The 4th of voltage-type treatment waveform TP4 is converted to the 5th treatment waveform TP5 of current type by voltage-current converter circuit 201, transformator amplifying circuit amplifies acquisition the 6th to the 5th treatment waveform TP5 amplitude of carrying out and treats waveform (TP61, TP62), that is to say A group treatment waveform.The 6th treatment waveform (TP61, TP62) after amplification is connected on human body by electrode slice (A, B) carries out electronic stimulation.
Conveniently patient understands the connection of electrode slice, and the present embodiment detects the first detection waveform Ta(i.e. the 6th treatment waveform TP61 by the testing circuit that comes off) voltage, transfer in microcontroller after carrying out analog digital conversion by analog to digital conversion circuit.Microcontroller carries out judgement to the voltage swing of the first detection waveform Ta can identify lead-fail detector state.
Conveniently patient understands the size of current of A group treatment ripple, and the present embodiment detects the second detection waveform Tb(i.e. the 6th treatment waveform TP62 by current detection circuit) electric current, transfer in microcontroller after being changed by analog to digital conversion circuit.The size of current of microcontroller to the second detection waveform Tb calculates the real-time current that flows through human body and feeds back, and so just forms a feedback system, thus realizes the Intelligent adjustment of electric current.
Described medium frequency electric stimulation therapeutic instrument regulates treatment waveform in real time according to real-time current and lead-fail detector state, so just makes the treatment waveform that acts on human body identical with the treatment waveform that microprocessor produces, thus improves the performance of whole system.
In the present embodiment, described D/A converting circuit 101, analog to digital conversion circuit 303 are prior art, are not described further its particular circuit configurations herein.
See also Fig. 2, described low-pass filter circuit 102 comprises the first operational amplifier OP1, the second operational amplifier OP2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4.The reverse input end of described first operational amplifier OP1 is connected the outfan of the first operational amplifier OP1, is also connected one end of the first resistance R1 by the first electric capacity C1, the positive input of the first operational amplifier OP1 by the second resistance R2 connect the first resistance R1 one end, also by the second electric capacity C2 ground connection, the other end of described first resistance R1 is by the outfan of the 3rd resistance R3 linking number analog conversion circuit 101, also by the 3rd electric capacity C3 ground connection; The outfan of described first operational amplifier OP1 connects the positive input of the second operational amplifier OP2, the reverse input end of the second operational amplifier OP2 connects the outfan of the second operational amplifier OP2 and one end of the 4th resistance R4, the other end bonding strength regulating circuit of described 4th resistance R4, also by the 4th electric capacity C4 ground connection.
Wherein, described first operational amplifier OP1, the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2 and the 3rd electric capacity C3 form active second-order low-pass filter, and described second operational amplifier OP2, the 4th resistance R4 and the 4th electric capacity C4 form RC wave filter.By the capacitance of the resistance and electric capacity that regulate these resistance, i.e. scalable cut-off frequency, thus useful frequency component in the first treatment waveform TP1 is passed through smoothly, thus export the second treatment waveform TP2 in dimmer circuit at the other end of the 4th resistance R4.
See also Fig. 3, described dimmer circuit comprises the first digital regulation resistance U1, the 5th resistance R5 and the 5th electric capacity C5; 1st end of described first digital regulation resistance U1 connects one end of the 5th resistance R5 by the 5th electric capacity C5, the other end of the 5th resistance R5 connects the other end of the 4th resistance R4.2nd end of the first digital regulation resistance U1 connects a SPI(Serial Peripheral interface) circuit.3rd end of the first digital regulation resistance U1 connects subtraction amplification circuit.
The the second treatment waveform TP2 exported due to low-pass filter circuit comprises DC component, when carrying out intensity adjustments, does not need to amplify DC component.Therefore, by the 5th electric capacity C5 filtering DC component, then amplitude adjustment is carried out by the first digital regulation resistance U1.One SPI circuit is used for changing the regulating command of user's input, exports one section of adjustment signal and regulates stimulation voltage intensity to the first digital regulation resistance U1, thus obtains the 3rd treatment waveform TP3.Because regulating command can be edited arbitrarily, therefore, the treatment intensity that the first digital regulation resistance U1 realizes can change in any way, such as incremental manner or decreasing fashion etc.
See also Fig. 4, in the present embodiment, described center line regulating circuit comprises the second digital regulation resistance U2,1st end of described second digital regulation resistance U2 connects power end VCC, 2nd end of the second digital regulation resistance U2 connects the 2nd SPI circuit, and the 3rd end of the second digital regulation resistance U2 connects subtraction amplification circuit.
The SPI coding that 2nd SPI circuit exports is for controlling the second digital regulation resistance U2 to regulate the voltage swing of center line.According to formula VT=K*VCC, the magnitude of voltage of the center line VT of output changes according to the change of COEFFICIENT K, and COEFFICIENT K is less than or equal to 1.Center line regulating circuit carrys out the value of adjustment factor K indeed through the SPI coding inputted, thus realizes the voltage-regulation of center line VT.The voltage magnitude of the follow-up positive negative wave of magnitude of voltage impact of center line.
3rd treatment waveform TP3 and center line VT transfer in subtraction amplification circuit carry out subtracting each other, processing and amplifying.See also Fig. 5, described subtraction amplification circuit comprises the 3rd operational amplifier OP3, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and the 9th resistance R9; The positive input of described 3rd operational amplifier OP3 connects the 3rd end of the first digital regulation resistance by the 6th resistance R6, the positive input of the 3rd operational amplifier OP3 also connects the outfan of the 3rd operational amplifier OP3 by the 7th resistance R7, the negative input of the 3rd operational amplifier OP3 by the 8th resistance R8 connect the second digital regulation resistance U2 the 3rd end, also by the 9th resistance R9 ground connection.The outfan of the 3rd operational amplifier OP3 connects voltage-current converter circuit.
Described subtraction amplification circuit asks difference to amplify, according to formula to the 3rd treatment waveform TP3 and center line VT
, the amplitude of the 4th treatment waveform TP4 can be obtained.It should be noted that in the present embodiment, the power supply of the 3rd operational amplifier OP3 is that positive/negative-pressure is powered, and so just can guarantee that the 4th treatment waveform TP4 is the treatment waveform of positive/negative-pressure.Described 4th treatment waveform TP4 is input in voltage-current converter circuit.
See also Fig. 6, described voltage-current converter circuit 201 comprises four-operational amplifier OP4, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the 13 resistance R13 and the 14 resistance R14; The positive input of described four-operational amplifier OP4 connects one end of the tenth resistance R10 and one end of the 11 resistance R11, the other end of described tenth resistance R10 connects the outfan of the 3rd operational amplifier OP3, the other end of the 11 resistance R11 connects one end and the transformator amplifying circuit of the 12 resistance R12, the other end of the 12 resistance R12 connects the outfan of four-operational amplifier OP4, and the reverse input end of four-operational amplifier OP4 is by the 13 resistance R13 ground connection, the outfan also being connected four-operational amplifier OP4 by the 14 resistance R14.
Described transformator amplifying circuit 202 comprises transformator T and the 15 resistance R15, one end of described transformator T armature winding connects the other end of the 11 resistance R11 and one end of the 12 resistance R12, the other end ground connection of transformator T armature winding, one end of transformator T secondary windings connects come off testing circuit and electrode slice A, the other end of transformator T secondary windings connects one end of the 15 resistance R15, and the other end of the 15 resistance R15 connects current detection circuit and electrode slice B.
4th treatment waveform TP4 of positive/negative-pressure needs to carry out Voltage to current transducer, makes the 4th of voltage-type the treatment waveform TP4 be converted to the 5th treatment waveform TP5 of current type.In the present embodiment, voltage-current converter circuit adopts power amplification circuit, when carrying out electric current conversion, also makes the power of the 4th treatment waveform TP4 obtain sufficient amplification.Then by transformator T, amplitude amplification is carried out to the 5th treatment waveform TP5.The electric current of the 5th treatment waveform TP5
.Wherein, requirement
.So just can by the voltage V of input
tP4switching current I-
l, the 4th treatment waveform TP4 by voltage-type is converted to the 5th treatment waveform TP5 of current type.
Then, the 5th treatment waveform TP5 of current type obtains voltage amplification (that is to say that amplitude is amplified) further by transformator, and meanwhile, transformator T also plays buffer action.The 6th treatment waveform (TP61, TP62) after amplification is connected to human body (with R in Fig. 6 by electrode slice (A, B)
peoplerepresent human body) on, thus realize the therapeutical effect of electricity irritation.
Keep normal connection status in order to ensure electrode slice and human body, the present embodiment adopts the 6th treatment waveform (TP61) to come off detection as electrode slice.See also Fig. 7, described in the testing circuit that comes off comprise the first diode D1, the second diode D2, the 3rd diode D3, the 16 resistance R16, the 17 resistance R17 and the 18 resistance R18.One end of the positive pole connection transformer T secondary windings of described first diode D1, the negative pole of the first diode D1 connects one end of the 17 resistance R17 and one end of the 18 resistance R18 by the 16 resistance R16, the other end ground connection of described 17 resistance R17, the other end of the 18 resistance R18 connects the positive pole of the second diode D2, the negative pole of the 3rd diode D3 and analog to digital conversion circuit, the negative pole of described second diode D2 connects power end VCC, the plus earth of the 3rd diode D3.
The amplitude of amplifying the 6th treatment waveform exported through Voltage to current transducer and transformator likely become greater to tens volts, and amplitude is higher.Then carry out electrode slice come off detect time, need to carry out voltage division processing, according to formula to voltage
, by regulating R16 and R17 resistance, output voltage V can be made
tPacontrol in the marginal range of microcontroller.R18 mainly plays metering function.Such electrode slice is coming off with when being connected, and the magnitude of voltage of the first detection waveform Ta will be different.First detection waveform Ta is transferred in microcontroller after being changed by analog to digital conversion circuit.Microcontroller carries out judgement to the voltage swing of the first detection waveform Ta can identify lead-fail detector state.During concrete enforcement, the judgement of the voltage swing of the first detection waveform Ta is specially to the waveform catalog identifying the first detection waveform Ta according to the situation of change of voltage swing.If the first detection waveform Ta is sine wave, represents and come off, if sawtooth waveforms then represents connection; Obviously different from the waveform of sawtooth waveforms (straight line rises or declines) based on sine wave, microcontroller can identify sine wave and sawtooth waveforms by related algorithm, thus judges lead-fail detector state.
In order to ensure the stability of the first detection waveform Ta, described in the testing circuit that comes off also comprise the 6th electric capacity C6 and the 7th electric capacity C7, one end of described 6th electric capacity C6 connects the negative pole of the first diode D1, the other end ground connection of the 6th electric capacity C6; One end of 7th electric capacity C7 connects the positive pole of the second diode D2, the negative pole of the 3rd diode D3 and analog to digital conversion circuit, the other end ground connection of the 7th electric capacity C7.
Lead-fail detector detects and belongs to qualitative, and current detecting belongs to quantitative.See also Fig. 8, described current detection circuit comprises the 5th operational amplifier OP5, the 6th operational amplifier OP6, the 4th diode D4, the 19 resistance R19, the 20 resistance R20, the 21 resistance R21 and the 22 resistance R22, the reverse input end of described 5th operational amplifier OP5 connects the negative pole of the 4th diode D4 by the 19 resistance R19, one end of 20 resistance R20 and one end of the 21 resistance R21, the plus earth of described 4th diode D4, the other end of the 20 resistance R20 connects the outfan of the 5th operational amplifier OP5, the other end of the 21 resistance R21 connects the other end and the electrode slice B of the 15 resistance R15, the positive input of described 5th operational amplifier OP5 is by the 22 resistance R22 ground connection, the outfan of the 5th operational amplifier OP5 connects the positive input of the 6th operational amplifier OP6, the reverse input end of the 6th operational amplifier OP6 connects outfan and the analog to digital conversion circuit of the 6th operational amplifier OP6.
When electrode slice is connected with human body, the secondary windings of transformator T, human body (R
people), the 15 resistance R15 forms a loop, is therefore the electric current by human body by the electric current on the 15 resistance R15.The present embodiment carrys out backwards calculation electric current by the voltage measured on the 15 resistance R15.Due to V
tP62=I
people× R15, V
tP62=V
tPb,
, V
tPc=V
tb, like this, just I can be pushed away to obtain
people=
.Second detection waveform Tb is transferred in microcontroller after being changed by analog to digital conversion circuit.The size of current of microcontroller to the second detection waveform Tb calculates real-time current value (I
people), thus realize the detection of electric current.It should be noted that needs to select high-precision resistance when the 15 resistance R15 type selecting, so just can guarantee the accuracy of current detecting.
In order to ensure the accuracy of current detecting, described current detection circuit also comprises the 8th electric capacity C8, 23 resistance R23, 24 resistance R24 and the 25 resistance R25, one end of described 8th electric capacity C8 connects one end of the 21 resistance R21, one end of 23 resistance R23 and one end of the 24 resistance R24, the other end ground connection of the 8th electric capacity C8, the other end ground connection of the 23 resistance R23, the other end of the 24 resistance R24 connects the negative pole of the 4th diode D4, the reverse input end of the 5th operational amplifier OP5 is also connected by the 19 resistance R19, one end of 25 resistance R25 connects the outfan of the 5th operational amplifier OP5, the other end of the 25 resistance R25 connects the positive input of the 6th operational amplifier OP6.
In sum, treatment Waveform generating apparatus provided by the invention and medium frequency electric stimulation therapeutic instrument have the following advantages:
1, can the intensity of adjustment for the treatment of waveform and positive/negative-pressure size, the object that the parameter achieving treatment waveform can regulate arbitrarily, and circuit structure is simple, whole system is with low cost, and treatment stability of waveform is good.
2, prior art adopts voltage-type electronic stimulation waveform, and the present invention adopts current type electronic stimulation waveform.Because the distance difference between electrode slice putting position difference or electrode slice can cause human body impedance to change, adopt current type electronic stimulation waveform, the treatment electric current be added on human body can not be changed along with human body impedance change, thus the treatment waveform making medium frequency electric stimulation therapeutic instrument export is consistent with the height of the treatment waveform really acted on human body, reach better expection therapeutic effect.
3, invention increases lead-fail detector measuring ability, use during medium frequency electric stimulation therapeutic instrument and would not produce electric shock risk because of touching electrode slice by mistake, can also the loose contact of reminding user electrode slice or situation about coming off, thus substantially increase safety in utilization and effectiveness.
4, invention increases current sense function, when the electric current for the treatment of waveform increases suddenly, user can be fed back to and regulate electric current in real time; Electric current can be avoided to increase suddenly the sense of discomfort brought.Further, the electric current real-time monitored and treatment intensity can also contrast by user, make the operation of therapeutic instrument become more simple and reliable.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (13)
1. a treatment Waveform generating apparatus, comprise and the first input waveform is carried out processing the first waveform control module exporting A group treatment waveform, and carry out processing the second waveform control module exporting B group treatment waveform to the second input waveform, it is characterized in that, described first waveform control module comprises regulation unit, conversion amplifying unit and detecting unit, and described regulation unit, conversion amplifying unit, detecting unit connect successively;
Described regulation unit is used for carrying out parameter adjustment and intensity adjustments to the first input waveform, and convert the treatment waveform of positive/negative-pressure to, described conversion amplifying unit carries out exporting A group treatment waveform after electric current conversion and amplitude are amplified to described treatment waveform, and detecting unit detects A group and treats the electric current of waveform and voltage and export.
2. treatment Waveform generating apparatus according to claim 1, is characterized in that, described regulation unit comprises:
D/A converting circuit, generates the first treatment waveform for carrying out digital-to-analogue conversion to the first input waveform;
Low-pass filter circuit, for carrying out Filtering Processing to described first treatment waveform, obtains the second treatment waveform;
Dimmer circuit, for the voltage strength of the adjustment signal adjustment second treatment waveform according to input, exports the 3rd treatment waveform;
Center line regulating circuit, for generation of a center line;
Subtraction amplification circuit, for the 3rd of positive waveform the treatment waveform is deducted center line and amplifies, obtains the 4th treatment waveform of positive/negative-pressure;
Described D/A converting circuit, low-pass filter circuit, dimmer circuit, subtraction amplification circuit connect successively, and described center line regulating circuit connects subtraction amplification circuit, and described subtraction amplification circuit connects conversion amplifying unit.
3. treatment Waveform generating apparatus according to claim 2, is characterized in that, described conversion amplifying unit comprises:
Voltage-current converter circuit, for by the 4th of voltage-type the treatment waveform transformation being the 5th treatment waveform of current type;
Transformator amplifying circuit, obtains A group treatment waveform for amplifying the 5th treatment waveform amplitude of carrying out;
Described voltage-current converter circuit connects subtraction amplification circuit and transformator amplifying circuit, and described transformator amplifying circuit connects detecting unit.
4. treatment Waveform generating apparatus according to claim 3, is characterized in that, described detecting unit comprises:
Come off testing circuit, for detecting the voltage change conditions of the 6th treatment waveform;
Current detection circuit, for detecting the curent change state of the 6th treatment waveform;
Analog to digital conversion circuit, for exporting the voltage of the 6th treatment waveform, electric current after carrying out analog digital conversion;
Described testing circuit connection transformer amplifying circuit and the analog to digital conversion circuit of coming off, described current detection circuit connection transformer amplifying circuit and analog to digital conversion circuit.
5. treatment Waveform generating apparatus according to claim 4, it is characterized in that, described low-pass filter circuit comprises the first operational amplifier, the second operational amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity; The reverse input end of described first operational amplifier is connected the outfan of the first operational amplifier, is also connected one end of the first resistance by the first electric capacity, the positive input of the first operational amplifier by the second resistance connect the first resistance one end, also by the second capacity earth, the other end of described first resistance is by the outfan of the 3rd resistance linking number analog conversion circuit, also by the 3rd capacity earth; The outfan of described first operational amplifier connects the positive input of the second operational amplifier, the reverse input end of the second operational amplifier connects the outfan of the second operational amplifier and one end of the 4th resistance, the other end bonding strength regulating circuit of described 4th resistance, also by the 4th capacity earth.
6. treatment Waveform generating apparatus according to claim 5, is characterized in that, described dimmer circuit comprises the first digital regulation resistance, the 5th resistance and the 5th electric capacity; 1st end of described first digital regulation resistance connects one end of the 5th resistance by the 5th electric capacity, the other end of the 5th resistance connects the other end of the 4th resistance, 2nd end of the first digital regulation resistance connects a SPI circuit, and the 3rd end of the first digital regulation resistance connects subtraction amplification circuit.
7. treatment Waveform generating apparatus according to claim 6, it is characterized in that, described center line regulating circuit comprises the second digital regulation resistance, 1st end of described second digital regulation resistance connects power end, 2nd end of the second digital regulation resistance connects the 2nd SPI circuit, and the 3rd end of the second digital regulation resistance connects subtraction amplification circuit.
8. treatment Waveform generating apparatus according to claim 7, is characterized in that, described subtraction amplification circuit comprises the 3rd operational amplifier, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance; The positive input of described 3rd operational amplifier connects the 3rd end of the first digital regulation resistance by the 6th resistance, the positive input of the 3rd operational amplifier also connects the outfan of the 3rd operational amplifier by the 7th resistance, the negative input of the 3rd operational amplifier by the 8th resistance connect the second digital regulation resistance the 3rd end, also by the 9th resistance eutral grounding; The outfan of the 3rd operational amplifier connects voltage-current converter circuit.
9. treatment Waveform generating apparatus according to claim 8, is characterized in that, described voltage-current converter circuit comprises four-operational amplifier, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance and the 14 resistance; The positive input of described four-operational amplifier connects one end of the tenth resistance and one end of the 11 resistance, the other end of described tenth resistance connects the outfan of the 3rd operational amplifier, the other end of the 11 resistance connects one end and the transformator amplifying circuit of the 12 resistance, the other end of the 12 resistance connects the outfan of four-operational amplifier, and the reverse input end of four-operational amplifier is by the 13 resistance eutral grounding, the outfan also being connected four-operational amplifier by the 14 resistance.
10. treatment Waveform generating apparatus according to claim 9, it is characterized in that, described transformator amplifying circuit comprises transformator and the 15 resistance, one end of described primary winding connects the other end of the 11 resistance and one end of the 12 resistance, the other end ground connection of primary winding, one end of transformer secondary output winding connects come off testing circuit and electrode slice A, the other end of transformer secondary output winding connects one end of the 15 resistance, and the other end of the 15 resistance connects current detection circuit and electrode slice B.
11. treatment Waveform generating apparatus according to claim 10, is characterized in that, described in the testing circuit that comes off comprise the first diode, the second diode, the 3rd diode, the 16 resistance, the 17 resistance and the 18 resistance; One end of the positive pole connection transformer secondary windings of described first diode, the negative pole of the first diode connects one end of the 17 resistance and one end of the 18 resistance by the 16 resistance, the other end ground connection of described 17 resistance, the other end of the 18 resistance connects the positive pole of the second diode, the negative pole of the 3rd diode and analog to digital conversion circuit, the negative pole of described second diode connects power end, the plus earth of the 3rd diode.
12. treatment Waveform generating apparatus according to claim 11, it is characterized in that, described current detection circuit comprises the 5th operational amplifier, the 6th operational amplifier, the 4th diode, the 19 resistance, the 20 resistance, the 21 resistance and the 22 resistance, the reverse input end of described 5th operational amplifier connects the negative pole of the 4th diode by the 19 resistance, one end of 20 resistance and one end of the 21 resistance, the plus earth of described 4th diode, the other end of the 20 resistance connects the outfan of the 5th operational amplifier, the other end of the 21 resistance connects the other end and the electrode slice B of the 15 resistance, the positive input of described 5th operational amplifier is by the 22 resistance eutral grounding, the outfan of the 5th operational amplifier connects the positive input of the 6th operational amplifier, the reverse input end of the 6th operational amplifier connects outfan and the analog to digital conversion circuit of the 6th operational amplifier.
13. 1 kinds of medium frequency electric stimulation therapeutic instruments, comprise microprocessor, a SPI circuit and the 2nd SPI circuit, it is characterized in that, also comprise as arbitrary in claim 1-12 as described in treatment Waveform generating apparatus; Described treatment Waveform generating apparatus connects microprocessor, a SPI circuit and the 2nd SPI circuit;
A described SPI circuit is used for changing the regulating command of input, exports the intensity of the treatment waveform that adjustment Signal Regulation treatment Waveform generating apparatus exports; 2nd SPI circuit is used for changing the control instruction of input, exports the positive/negative-pressure size for the treatment of waveform described in SPI coding and regulating; The voltage swing of described microcontroller to described treatment waveform carries out judgement to be carried out identifiable design and goes out lead-fail detector state, also calculates to the size of current for the treatment of waveform the real-time current that flows through human body and feeds back.
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| CN106730329A (en) * | 2016-12-03 | 2017-05-31 | 潍坊大地医疗器械有限公司 | A kind of electronic channel therapeutic equipment of low cost of manufacture |
| CN106730331A (en) * | 2016-12-03 | 2017-05-31 | 潍坊大地医疗器械有限公司 | A kind of electronic channel therapeutic equipment of fast response time |
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| CN110833656A (en) * | 2019-12-16 | 2020-02-25 | 大连理工大学 | Constant-current output intermediate frequency therapeutic instrument system |
| CN110833656B (en) * | 2019-12-16 | 2021-03-26 | 大连理工大学 | Constant-current output intermediate frequency therapeutic instrument system |
| CN111632265A (en) * | 2020-06-29 | 2020-09-08 | 广州市卫健医疗器械有限公司 | Micro-current stimulation instrument |
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| CN114306927A (en) * | 2021-12-29 | 2022-04-12 | 苏州好博医疗器械股份有限公司 | Intermediate frequency electric wave modulation circuit and modulation method |
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Effective date of registration: 20190531 Address after: 518000 Tianliao Community Tianliao Avenue Convergence Mold Industrial Park, Yutang Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Jingbaotian Technology Co., Ltd. Address before: 518060 3688 Nanhai Road, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen University |