CN109771817A - A kind of constant current stimulation circuit of Dynamic voltage scaling - Google Patents
A kind of constant current stimulation circuit of Dynamic voltage scaling Download PDFInfo
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- CN109771817A CN109771817A CN201910087073.1A CN201910087073A CN109771817A CN 109771817 A CN109771817 A CN 109771817A CN 201910087073 A CN201910087073 A CN 201910087073A CN 109771817 A CN109771817 A CN 109771817A
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- 230000000638 stimulation Effects 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000011897 real-time detection Methods 0.000 claims abstract description 3
- 210000003205 muscle Anatomy 0.000 claims description 19
- 230000005284 excitation Effects 0.000 claims description 18
- 210000004126 nerve fiber Anatomy 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000004936 stimulating effect Effects 0.000 description 5
- 210000005036 nerve Anatomy 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000001087 myotubule Anatomy 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention discloses a kind of constant current stimulation circuits of Dynamic voltage scaling, comprising: supply voltage module, constant current output module, equivalent load and the impedance detection circuit being sequentially connected in a closed loop mode；The supply voltage module is used to export a supply voltage to the constant current output module, the constant current output module is used to load a constant stimulation electric current to the equivalent load, and the impedance detection circuit is used to the impedance magnitude of equivalent load described in real-time detection and will test signal feed back to the supply voltage module；Wherein, the supply voltage module is additionally provided with control unit, and described control unit receives the detection signal of the impedance detection circuit feedback and adjusts the size of the supply voltage of the supply voltage module output.The present invention solves in the prior art, and residual voltage existing for constant current stimulation circuit can increase return loss, and then the problem of the service life of influence constant current stimulation circuit.
Description
Technical field
The invention belongs to a kind of constant current of medical constant current egersimeter technical field more particularly to Dynamic voltage scaling stimulations
Circuit.
Background technique
Clinically, muscle constant current electro photoluminescence is a kind of more common stimulating method, is usually applied to muscle, nervous excitation
Property detection and the fields such as rehabilitation, cardinal principle be that electric stimulation pulse is discharged by electrode according to doctor's setup parameter, it is right
Muscle or nerve fiber apply the electric pulse stimulation of constant current, and in stimulating course, tissue resistance can be approximately constant
Value, when stimulation, structural voltage value was positively correlated with inter-electrode impedance, therefore usually such stimulating apparatus has output electric current perseverance
The characteristics of fixed, output voltage is with impedance variations.
In the prior art, applied to nerve, the constant current stimulating apparatus of muscle, circuit structure generally comprises stimulation power supply electricity
Road, constant current stimulation circuit, control circuit and signal feed back four parts.Stimulating power circuit function is mentioned for constant current stimulation circuit
For operating voltage, constant current stimulation circuit is based on voltage clamping principle, and benchmark electricity is formed on the loop resistance of constant current stimulation circuit
Stream, is connected by loop resistance and switching device with output electrode, and when stimulation, the voltage clamping in series resistance is being set
Value, and then the size of current flowed through in series connection stimulation circuit is controlled, realize constant current output, simple with structure, control is flexible
The features such as.
But there is also certain defects for the constant current stimulation circuit of the prior art, only have constant current individual event output function,
It not can guarantee output voltage amplitude, muscle, nerve fiber generally for the different impedance values of matching, while maintaining in a certain range
Electric current constant current output ability, electrode output voltage values when stimulation circuit supply voltage need to guarantee not less than maximum constant current value, when
When tissue impedance is lower or continuous current is not up to maximum value, output stimulation voltage fails to reach maximum constant current voltage, more
Residual voltage is loaded into series resistance and switching device, undoubtedly increases return loss, and in multiple continued stimulus, remaining
Voltage constantly impacts related device, and the performance to device is also a kind of test.
Summary of the invention
The present invention provides a kind of constant current stimulation circuits of Dynamic voltage scaling, to solve in the prior art, constant current stimulation
Residual voltage existing for circuit can increase return loss, and then the problem of the service life of influence constant current stimulation circuit.
To realize the above goal of the invention, the technical solution of use are as follows:
A kind of constant current stimulation circuit of Dynamic voltage scaling, comprising: the supply voltage module that is sequentially connected in a closed loop mode, constant current are defeated
Module, equivalent load and impedance detection circuit out；The supply voltage module is used for one electricity of constant current output module output
Source voltage, the constant current output module are used to load a constant stimulation electric current, the impedance detection circuit to the equivalent load
The supply voltage module is fed back to for detecting the impedance magnitude of the equivalent load and will test signal；Wherein, the electricity
Source voltage module is additionally provided with control unit, and described control unit receives the detection signal of the impedance detection circuit feedback and adjusts
The size of the supply voltage of the supply voltage module output.
The present invention is further arranged to: the detection signal of the impedance detection circuit feedback is digital signal.
The present invention is further arranged to: the impedance detection circuit includes: first contacted respectively with the equivalent load
Electrode and second electrode；For providing the excitation module of high frequency sinusoidal ac signal to the first electrode；For to described
The demodulation module that the voltage feedback signal of second electrode is detected and converted.
The present invention is further arranged to: the input terminal input of the excitation module has high frequency sinusoidal ac signal, described
The output end of excitation module is connect with the first electrode.
The present invention is further arranged to: the input terminal of the demodulation module, which receives, has the Voltage Feedback of the second electrode to believe
Number, the output end of the demodulation module is connect with described control unit.
The present invention is further arranged to: the excitation module includes: for carrying out to the high frequency sinusoidal ac signal
It filters and removes the filter unit made an uproar；For amplifying the amplifying unit of processing to the high frequency sinusoidal ac signal.
The present invention is further arranged to: the demodulation module include: for the voltage feedback signal be filtered with
The processing unit of amplification；For carrying out the A/D converter of analog-to-digital conversion to the voltage feedback signal.
The present invention is further arranged to: the equivalent load is human muscle, nerve fiber.
The present invention is further arranged to: the impedance of the human muscle, nerve fiber of the impedance detection circuit detection are skin
Skin impedance.
The present invention is further arranged to: the filter unit is sequentially connected with the amplifying unit, the processing unit with
The A/D converter is sequentially connected.
In conclusion compared with prior art, the invention has the following advantages: passing through supply voltage module, constant current
Output module and impedance detection circuit, so that the constant current output module is when loading a constant current to equivalent load, it is described
Impedance detection circuit, which can pass through the impedance magnitude of equivalent load described in real-time monitoring and will test signal, feeds back to control unit, into
One step, described control unit adjusts the supply voltage size of the supply voltage module output, i.e., by above-mentioned setting, so that
The impedance of the equivalent load matches with supply voltage, has different constant stimulation electric currents in constant current output module output
In the case of, the supply voltage module configures corresponding supply voltage, is allowed to meet the output demand of constant current output module, with drop
Residual voltage in low constant current stimulation circuit greatly improves safety and the job stability of system, improves constant current thorn
The service life of excitation circuit.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of frame diagram of the constant current stimulation circuit of Dynamic voltage scaling disclosed by the embodiments of the present invention；
Fig. 2 is the frame diagram of impedance detection circuit disclosed by the embodiments of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Present embodiment discloses a kind of constant current stimulation circuits of Dynamic voltage scaling, as shown in Figure 1, comprising: successively closed loop
Supply voltage module 10, constant current output module 20, equivalent load 30 and the impedance detection circuit 40 of connection；The supply voltage mould
Block 10 is used to export a supply voltage to the constant current output module 20, and the constant current output module 20 is used for the equivalent negative
Carry 30 one constant stimulation electric currents of load, impedance magnitude of the impedance detection circuit 40 for equivalent load 30 described in real-time detection
And it will test signal and feed back to the supply voltage module 10；Wherein, the supply voltage module 10 is additionally provided with control unit 11,
Described control unit 11 receives the detection signal that the impedance detection circuit 40 is fed back and to adjust the supply voltage module 10 defeated
The size of supply voltage out.
In the specific implementation process, the constant current output module 20 is loading a constant current to the equivalent load 30
When, the impedance detection circuit 40, which can pass through the impedance magnitude of equivalent load 30 described in real-time monitoring and will test signal, to be fed back to
Control unit 11, further, described control unit 11 adjust the supply voltage size that the supply voltage module 10 exports, and make
The impedance for obtaining the equivalent load 30 matches with supply voltage, has different constant stimulations in the constant current output module 20 output
In the case where electric current, the supply voltage module 10 configures corresponding supply voltage, is allowed to meet the defeated of constant current output module 20
Demand out, to reduce the residual voltage in constant current stimulation circuit.
It should be noted that the detection signal that the impedance detection circuit 40 is fed back is time discrete, amplitude is also discrete
Digital signal, the digital signal are also known as demodulated signal, convenient for the acquisition of described control unit 11, processing and conversion.
As shown in Fig. 2, the impedance detection circuit 40 includes: the first electrode 41 contacted respectively with the equivalent load 30
With second electrode 42；For providing the excitation module 43 of high frequency sinusoidal ac signal to the first electrode 41；For to institute
The demodulation module 44 that the voltage feedback signal for stating second electrode 42 is detected and converted, wherein the excitation module 43 it is defeated
Entering end input has high frequency sinusoidal ac signal, and the output end of the excitation module 43 is connect with the first electrode 41, described
The input terminal of demodulation module 44 receives the voltage feedback signal for having the second electrode 42, the output end of the demodulation module 44 with
Described control unit 11 connects.
In the specific implementation process, the equivalent load 30 is human muscle, nerve fiber, the impedance detection circuit 40
The human muscle of detection, the impedance of nerve fiber are Skin Resistance, it should be noted that between the human muscle, nerve fiber
Impedance be divided into contact impedance and Skin Resistance, wherein contact impedance be in capacitive character, high frequency sinusoidal exchange electric excitation under impedance
It is gradually reduced, and Skin Resistance remains unchanged, and can detect that human skin hinders in such a way that high frequency sinusoidal exchanges electric excitation
Anti- value, in the constant current output module 20 stimulation, the impedance of the human muscle, nerve fiber refer to this blocked impedance value,
Therefore, the input terminal input that the excitation module 43 is arranged has high frequency sinusoidal ac signal.
In the specific implementation process, the first electrode 41 accesses the human muscle, nerve with the second electrode 42
After tissue, the high frequency sinusoidal ac signal of the release of excitation module 43 after processing is acted on by the first electrode 41
To the human muscle, nerve fiber, the voltage of different peak values is formed in the human muscle of different impedances, nerve fiber, by
Skin Resistance effect, above-mentioned voltage forms obvious pressure drop, and then is detected at the second electrode 42 by the demodulation module 44
Voltage can obtain the carrier signal of the impedance information comprising human muscle, nerve fiber, that is, obtain the equivalent load 30
Resistance value size, the constant current output module 20 output stimulated current it is constant in the case where, be by Ohm's law operation
The minimal stimulation supply voltage for being able to maintain that constant current stimulation can be obtained, described control unit 11 adjusts the supply voltage module 10
Output, it is equal with minimal stimulation supply voltage to make it, is guaranteeing 20 constant current of constant current output module stimulation to reach
While, the purpose that the supply voltage of constant current stimulation circuit is preferably minimized, correspondingly, the present invention reduces constant current stimulation circuit
Middle residual voltage bring security risk improves system operational security and reduces power consumption.
As shown in Fig. 2, the excitation module 43 includes: for the high frequency sinusoidal ac signal to be filtered and removed
The filter unit 431 made an uproar；For amplifying the amplifying unit 432 of processing to the high frequency sinusoidal ac signal.
In the specific implementation process, the filter unit 431 is sequentially connected with the amplifying unit 432, and the filtering is single
Member 431 can carry out shaping to high frequency sinusoidal ac signal, filter out the useless frequency of decaying of the high frequency sinusoidal ac signal
Rate signal, while the purpose for inhibiting interference and noise is also played, and then achieve the purpose that improve signal-to-noise ratio, guaranteeing the high frequency just
The Transfer Quality of string ac signal is applied to people by the first electrode 41 after the amplifying unit 432 amplification
Body muscle, nerve fiber.
As shown in Fig. 2, the demodulation module 44 includes: for being filtered to the voltage feedback signal and enhanced processing
Processing unit 442；For carrying out the A/D converter 441 of analog-to-digital conversion to the voltage feedback signal.
In the specific implementation process, the processing unit 442 is sequentially connected with the A/D converter 441, and the processing is single
After the voltage feedback signal of the second electrode 42 is followed, filtered, amplified, compare processing by member 442, an amplitude stabilization is exported
Voltage feedback signal to the A/D converter 441, the A/D converter 441 is by analog-to-digital conversion, by voltage feedback signal
Digital signal is converted to export to the described control unit 11.
It should be noted that described control unit 11 may include boosting, decompression, control circuit, signal feedback relatively etc.,
Step-up/step-down circuit can be constituted by transformer or integrated circuit related with same, chip etc., supply voltage can be such as adjusted by way of PWM,
Its pulsewidth is modulated by control circuit and realizes voltage amplitude adjustment etc., is not stated here deposited.
The present invention loads a high frequency sinusoidal ac signal to the equivalent load 30 by the impedance detection circuit 40,
The impedance magnitude that the equivalent load 30 is obtained by detecting the voltage feedback signal at the second electrode 42, in the constant current
In the case that the stimulated current that output module 20 exports is constant, the electricity for being able to maintain that constant current stimulation is calculated by Ohm's law
Source voltage, the output that described control unit 11 adjusts the supply voltage module 10 is equal with calculated value, to reduce constant current
Residual voltage bring security risk in stimulation circuit is realized in conjunction with the impedance detection circuit 40, realizes the power supply electricity
The Dynamic voltage scaling function of die block 10, compared with previous nerve, muscle constant current stimulation mode, the present invention is guaranteeing constant current thorn
While swashing, the voltage of constant current stimulation circuit is preferably minimized, greatly reduces human muscle, the high stimulation of nerve fiber contact
The risk of supply voltage, while residual voltage bring security risk in constant current stimulation circuit is eliminated, improve constant current stimulation
The job security and stability of circuit, also reduce the power consumption of constant current stimulation circuit.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Make several modifications and improvements.These also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (10)
1. a kind of constant current stimulation circuit of Dynamic voltage scaling characterized by comprising the supply voltage mould being sequentially connected in a closed loop mode
Block, constant current output module, equivalent load and impedance detection circuit；
The supply voltage module is used to export a supply voltage to the constant current output module, and the constant current output module is used for
A constant stimulation electric current, resistance of the impedance detection circuit for equivalent load described in real-time detection are loaded to the equivalent load
Anti- size simultaneously will test signal and feed back to the supply voltage module；
Wherein, the supply voltage module is additionally provided with control unit, and described control unit receives the impedance detection circuit feedback
Detection signal and adjust supply voltage module output supply voltage size.
2. a kind of constant current stimulation circuit of Dynamic voltage scaling as described in claim 1, which is characterized in that the impedance detection
The detection signal of electronic feedback is digital signal.
3. a kind of constant current stimulation circuit of Dynamic voltage scaling as described in claim 1, which is characterized in that the impedance detection
Circuit includes:
The first electrode and second electrode contacted respectively with the equivalent load；
For providing the excitation module of high frequency sinusoidal ac signal to the first electrode；
The demodulation module for being detected and being converted for the voltage feedback signal to the second electrode.
4. a kind of constant current stimulation circuit of Dynamic voltage scaling as claimed in claim 3, which is characterized in that the excitation module
Input terminal input have high frequency sinusoidal ac signal, the output end of the excitation module is connect with the first electrode.
5. a kind of constant current stimulation circuit of Dynamic voltage scaling as claimed in claim 3, which is characterized in that the demodulation module
Input terminal receive and have the voltage feedback signal of the second electrode, the output end and described control unit of the demodulation module connect
It connects.
6. a kind of constant current stimulation circuit of Dynamic voltage scaling as claimed in claim 3, which is characterized in that the excitation module
Include:
For being filtered to the high frequency sinusoidal ac signal and removing the filter unit made an uproar；
For amplifying the amplifying unit of processing to the high frequency sinusoidal ac signal.
7. a kind of constant current stimulation circuit of Dynamic voltage scaling as claimed in claim 3, which is characterized in that the demodulation module
Include:
For being filtered the processing unit with amplification to the voltage feedback signal；
For carrying out the A/D converter of analog-to-digital conversion to the voltage feedback signal.
8. a kind of constant current stimulation circuit of Dynamic voltage scaling as claimed in claim 1 or 3, which is characterized in that described equivalent
Load is human muscle, nerve fiber.
9. a kind of constant current stimulation circuit of Dynamic voltage scaling as claimed in claim 8, which is characterized in that the impedance detection
The human muscle of circuit detection, the impedance of nerve fiber are Skin Resistance.
10. such as a kind of described in any item constant current stimulation circuits of Dynamic voltage scaling of claim 6-7, which is characterized in that institute
It states filter unit to be sequentially connected with the amplifying unit, the processing unit is sequentially connected with the A/D converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910087073.1A CN109771817A (en) | 2019-01-29 | 2019-01-29 | A kind of constant current stimulation circuit of Dynamic voltage scaling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910087073.1A CN109771817A (en) | 2019-01-29 | 2019-01-29 | A kind of constant current stimulation circuit of Dynamic voltage scaling |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110812693A (en) * | 2019-09-27 | 2020-02-21 | 中国科学院心理研究所 | Multichannel high-frequency non-invasive accurate positioning nerve stimulation system |
| CN111510005A (en) * | 2020-05-28 | 2020-08-07 | 苏州浪潮智能科技有限公司 | PSU applied to high-density GPU and power supply system |
| CN111729192A (en) * | 2020-06-16 | 2020-10-02 | 中南民族大学 | Neural front end closed loop stimulation circuit |
| CN113018683A (en) * | 2021-03-01 | 2021-06-25 | 安徽效隆科技有限公司 | Transcranial real-time alternating current stimulation equipment and current control method |
| CN114599143A (en) * | 2020-12-04 | 2022-06-07 | 中国科学院大连化学物理研究所 | Sliding arc discharge plasma generating system |
| CN114870249A (en) * | 2022-04-18 | 2022-08-09 | 北京理工大学 | Closed-loop adaptive alternating current stimulation neural network regulation method and system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110812693A (en) * | 2019-09-27 | 2020-02-21 | 中国科学院心理研究所 | Multichannel high-frequency non-invasive accurate positioning nerve stimulation system |
| CN110812693B (en) * | 2019-09-27 | 2021-08-03 | 中国科学院心理研究所 | Multichannel high-frequency non-invasive accurate positioning nerve stimulation system |
| CN111510005A (en) * | 2020-05-28 | 2020-08-07 | 苏州浪潮智能科技有限公司 | PSU applied to high-density GPU and power supply system |
| CN111729192A (en) * | 2020-06-16 | 2020-10-02 | 中南民族大学 | Neural front end closed loop stimulation circuit |
| CN114599143A (en) * | 2020-12-04 | 2022-06-07 | 中国科学院大连化学物理研究所 | Sliding arc discharge plasma generating system |
| CN113018683A (en) * | 2021-03-01 | 2021-06-25 | 安徽效隆科技有限公司 | Transcranial real-time alternating current stimulation equipment and current control method |
| CN114870249A (en) * | 2022-04-18 | 2022-08-09 | 北京理工大学 | Closed-loop adaptive alternating current stimulation neural network regulation method and system |
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Application publication date: 20190521 |