CN111632271A - Human body electrotherapy circuit - Google Patents
Human body electrotherapy circuit Download PDFInfo
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- CN111632271A CN111632271A CN201910158537.3A CN201910158537A CN111632271A CN 111632271 A CN111632271 A CN 111632271A CN 201910158537 A CN201910158537 A CN 201910158537A CN 111632271 A CN111632271 A CN 111632271A
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- output
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- human body
- electrotherapy
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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
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/36014—External stimulators, e.g. with patch electrodes
- A61N1/3603—Control systems
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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
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/36014—External stimulators, e.g. with patch electrodes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electrotherapy Devices (AREA)
Abstract
The present invention provides an electrotherapy circuit for a human body, comprising: an output circuit, and a control device for controlling the output; the output circuit is provided with a feedback circuit, and the feedback circuit feeds back the voltage loaded on the human body and the current output to the human body to the control device in real time to be used as real-time monitoring; the control device is used for starting the output of the compensation circuit to complement the set output value when the feedback circuit detects that the output is lower than the set output. The invention has the advantage that when the actual output is lower than the actual set output, the expected output value can still be output. When the invention is used for medical appliances, the effect of treatment can be ensured by keeping the output value output to the human body.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a human body electrotherapy circuit.
Background
Electrotherapy is a new treatment modality that has emerged in recent years. The method is to apply micro current or pulse voltage directly to human body to obtain certain therapeutic effect, and to apply electric energy to human body to prevent and treat diseases. The human body is a complex electrical conductor with different areas having different impedances and current/voltage tolerance limits. Therefore, how to ensure the stability and the continuous maintenance of the output micro-current within a certain range during the electrotherapy is an important issue to be solved by the electrotherapy technology.
In addition to containing a large amount of moisture, the human body contains many conductive electrolytes and non-conductive dielectrics, so that the human body is actually a complex conductor with both resistance and capacitance properties, which is the material basis for electrotherapy. The electric energy acts on human body to cause in vivo physicochemical reaction, and influences the functions of tissues and organs through nerve-body fluid action, thereby achieving the purposes of eliminating pathogeny, regulating functions, improving metabolism, enhancing immunity, and promoting the repair and regeneration of damaged tissues. The body responds differently to different properties of the current, and the therapeutic mechanism is different. The same current/voltage causes different responses of human bodies when the using method and the dosage are different. In addition, different organs and tissues, different functional states and pathological changes of the human body have different responses to current/voltage.
Electrotherapy, like other treatments, has specific side effects and complications. Common complications are mainly headache, nausea, vomiting and reversible memory decline. The incidence of memory decline is high and foreign studies have found that at least 1/3 patients show significant memory decline after receiving electrotherapy. However, it is generally accepted that the effects of electroconvulsive therapy on memory are limited and often only temporary, and clinically these symptoms generally improve themselves without treatment after treatment.
Modern electrotherapy has not only the above side effects, but also a few disadvantages, such as that a large current is applied to certain parts of the human body for a short time due to the impedance change of the human body, which may cause irreversible damage or pain to the human body. Practice proves that the stable micro-current is relatively safe for human bodies. Therefore, how to ensure that the electrotherapy device smoothly outputs controllable micro-current in the electrotherapy process is a fundamental measure for ensuring the safety and comfort of electrotherapy.
But it is very difficult to do this in an actual electrotherapy device. First, the output characteristics of the electrotherapy device are considered, if the output value is too large, the output value will bring a great risk, otherwise if the output value of the output circuit is strictly controlled, the output value may be too small in most of the treatment time, thereby affecting the treatment effect, and the too small output value is often difficult to find and correct.
Disclosure of Invention
The invention aims to provide a scheme for human body electrotherapy based on the problems, solves the problems that the current human body electrotherapy device has unstable and inaccurate output, thereby causing poor treatment effect and being difficult to find and solve the problem of insufficient or overlarge output current, and realizes a simple and reliable human body electrotherapy circuit capable of realizing more accurate and precise current/voltage output.
In order to achieve the above object, the present invention provides an electrotherapy circuit for a human body, comprising: an output circuit, and a control device for controlling the output; the output circuit is provided with a feedback circuit, and the feedback circuit feeds back the voltage loaded on the human body and the current output to the human body to the control device in real time to be used as real-time monitoring; the control device is used for starting the output of the compensation circuit to complement the set value when the feedback circuit detects that the output is lower than the set value.
The control device can respectively adjust the output of the output circuit and the output of the compensation circuit, wherein the first step length of the output adjustment of the output circuit is larger and is used for coarse adjustment output, and the second step length of the output adjustment of the compensation circuit is smaller than the first step length and is used for fine adjustment output.
The feedback circuit is provided with an isolation circuit, and when monitoring output, the isolation circuit reduces the influence of the leakage current characteristic of the feedback circuit on the output and improves the output precision. An isolation circuit is arranged between the compensation circuit and the output circuit, and the isolation circuit reduces the influence on the output when the compensation circuit is not started and improves the output precision. The feedback circuit is connected to two ends of a constant value resistor on the output circuit. The isolation circuit realizes leakage current isolation by using an operational amplifier.
The present invention achieves a circuit scheme for maintaining an output, providing a backup or compensation circuit for outputting a desired output value when the output is below an actual set value. When the invention is used for medical appliances, the effect of treatment can be ensured by keeping the output value output to the human body.
The standby or compensation circuit is used for triggering the main control chip to start the standby or compensation circuit according to the output monitoring of the feedback device when the output of the output device is reduced, so as to increase the output and ensure that the output value is a set value. The standby or compensation circuit can output compensation output with a certain step length under the control of the control device, and the fine adjustment of the actual output is realized, so that the actual output is gradually close to a set value. An isolating device is required to be added between the standby or compensation circuit and the output end so as to eliminate the influence on a normal output circuit when the standby or compensation circuit is not started.
The significance of the invention is to ensure that the output value is a set value so as to ensure the treatment effect when the circuit device is used for human body current/voltage treatment.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of a typical human electrotherapy circuit;
FIG. 2 is a block circuit diagram of one embodiment of the present invention;
fig. 3 is a circuit diagram of the isolation circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a current/voltage holding circuit, in particular to the design of a compensation circuit, a detection circuit and an isolation circuit, aiming at the problem that the electrotherapy device in the prior art is not enough and can not accurately output treatment current/voltage, so that the treatment is not accurate. Meanwhile, the output value is ensured to be the expected set value through the application of a standby or compensating device.
The use of an isolation circuit ensures that the output of the normal circuit is not affected by the standby or compensation circuit. Meanwhile, the feedback of the feedback circuit is more accurate by installing an isolation circuit on the feedback circuit to eliminate leakage current, and the control device can better control output according to parameters provided by the feedback circuit.
The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
Referring first to fig. 1, fig. 1 is a block diagram of a typical human electrotherapy circuit.
The human body electrotherapy circuit shown in fig. 1 is mainly composed of two parts, an output circuit and a control device (not shown). The output circuit outputs a current and/or a voltage. The control device controls the magnitude of the output current or voltage. The invention adds a feedback circuit on the output circuit, the feedback circuit can be any current and/or voltage feedback circuit or a measuring circuit, and measures and feeds back the real-time circuit parameters, such as voltage or current, of the connected output circuit end, and feeds back the real-time circuit parameters to the control device. The control device may monitor and implement the adjustment circuit output based on these circuit parameters. The feedback circuit is connected across a fixed resistor, i.e. the high precision resistor in fig. 1, on the current output circuit. Therefore, the feedback circuit can feed back the voltage difference and/or the current value at two ends of the resistor as circuit parameters to the control device according to the resistance value side of the resistor.
In some embodiments, an isolation circuit is also connected between the feedback circuit and the output circuit. The isolation device has the advantages that the influence of the leakage current characteristic of the feedback circuit on the output current when the output current is monitored is solved, and the accuracy of the output current is improved. In the embodiment of fig. 1, an isolation circuit (not shown in the figure) may be provided before two contact points of the feedback circuit and the output circuit, respectively.
Referring to fig. 2, fig. 2 is a circuit block diagram of an embodiment of the invention. The embodiment of fig. 2 adds a backup compensation circuit for enabling the compensation circuit output current to complement the setpoint when the feedback circuit detects that the output value is below the setpoint. The control device may calculate the output value of the compensation circuit according to the circuit parameter of the feedback circuit, or may preset the output value of the compensation circuit.
The control means may adjust the output of the output circuit and the output of the compensation circuit separately, wherein a first step size for the output adjustment of the output circuit is larger for coarse adjustment of the output and a second step size for the output adjustment of the compensation circuit is smaller than the first step size for fine adjustment of the output. The standby or compensation circuit can also independently output compensation output with a certain step length under the control of the control device, so that the fine adjustment of the actual output is realized, and the actual output is gradually close to a set value.
In fig. 2, an isolation circuit is also connected between the compensation circuit and the output circuit, and an isolation circuit needs to be added between the standby or compensation circuit and the output end to eliminate the influence on the normal output circuit when the standby or compensation circuit is not activated.
Referring to fig. 3, fig. 3 is a circuit diagram of an isolation circuit according to the present invention. The isolation circuit in fig. 3 is an operational amplifier, with the positive terminal connected to the feedback terminal of the output circuit and the negative terminal connected to the output terminal of the operational amplifier. The output end of the feedback circuit is connected with the feedback circuit or the compensation circuit. The output circuit and the feedback circuit or the compensation circuit are connected in such a way, and the leakage current of the feedback circuit or the compensation circuit is isolated from the output current of the output circuit, so that the feedback circuit or the compensation circuit is prevented from influencing the output.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (6)
1. A human electrotherapy circuit comprising:
an output circuit, and a control device for controlling the output; the device is characterized in that the output circuit is provided with a feedback circuit, and the feedback circuit feeds back the voltage loaded on the human body and the current output to the human body to the control device in real time to be used as real-time monitoring; the control device is used for starting the output of the compensation circuit to complement the set value when the feedback circuit detects that the output is lower than the set value.
2. The electrotherapy circuit for human body according to claim 1, wherein said control means can adjust the output of the output circuit and the output of the compensation circuit respectively, wherein a first step size for the output adjustment of the output circuit is larger for the coarse adjustment output, and a second step size for the output adjustment of the compensation circuit is smaller than the first step size for the fine adjustment output.
3. The electrotherapy circuit according to claim 1, wherein an isolation circuit is provided in said feedback circuit, and when monitoring the output, said isolation circuit reduces the influence of the leakage current characteristic of the feedback circuit on the output, thereby improving the accuracy of the output.
4. The electrotherapy circuit according to claim 1, wherein an isolation circuit is provided between said compensation circuit and said output circuit, said isolation circuit reducing the effect on the output when the compensation circuit is not activated and improving the output accuracy.
5. The human body electrotherapy circuit according to any one of claims 3 to 4, wherein said isolation circuit utilizes an operational amplifier to achieve leakage current isolation.
6. The electrotherapy circuit for a human body according to claim 1, wherein said feedback circuit is connected across a constant resistance on said output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910158537.3A CN111632271A (en) | 2019-03-01 | 2019-03-01 | Human body electrotherapy circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910158537.3A CN111632271A (en) | 2019-03-01 | 2019-03-01 | Human body electrotherapy circuit |
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| CN111632271A true CN111632271A (en) | 2020-09-08 |
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| CN201910158537.3A Pending CN111632271A (en) | 2019-03-01 | 2019-03-01 | Human body electrotherapy circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113648204A (en) * | 2021-08-18 | 2021-11-16 | 云南力衡医疗技术有限公司 | Method and system for checking and verifying output prescription of therapeutic apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113648204A (en) * | 2021-08-18 | 2021-11-16 | 云南力衡医疗技术有限公司 | Method and system for checking and verifying output prescription of therapeutic apparatus |
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Application publication date: 20200908 |