CN117427273A - Electrical stimulation device - Google Patents
Electrical stimulation device Download PDFInfo
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- CN117427273A CN117427273A CN202210833453.7A CN202210833453A CN117427273A CN 117427273 A CN117427273 A CN 117427273A CN 202210833453 A CN202210833453 A CN 202210833453A CN 117427273 A CN117427273 A CN 117427273A
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- 230000000638 stimulation Effects 0.000 title claims abstract description 155
- 239000003990 capacitor Substances 0.000 claims abstract description 118
- 238000005070 sampling Methods 0.000 claims description 21
- 230000004936 stimulating effect Effects 0.000 claims description 17
- 230000005669 field effect Effects 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 abstract description 15
- 208000028659 discharge Diseases 0.000 description 65
- 210000005036 nerve Anatomy 0.000 description 10
- 230000003071 parasitic effect Effects 0.000 description 10
- 238000011282 treatment Methods 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000004126 nerve fiber Anatomy 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007383 nerve stimulation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 210000002972 tibial nerve Anatomy 0.000 description 1
Classifications
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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
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
-
- 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
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/3606—Implantable neurostimulators for stimulating central or peripheral nerve system adapted for a particular treatment
- A61N1/36103—Neuro-rehabilitation; Repair or reorganisation of neural tissue, e.g. after stroke
-
- 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
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/36125—Details of circuitry or electric components
-
- 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
- A61N1/3605—Implantable neurostimulators for stimulating central or peripheral nerve system
- A61N1/36128—Control systems
- A61N1/36146—Control systems specified by the stimulation parameters
Abstract
The present application relates to an electrical stimulation device. The device comprises: the charge-discharge capacitor is used for being connected with the electrode, the working stage of the charge-discharge capacitor comprises a charge stage and a stimulation stage, the voltage of the charge-discharge capacitor is increased to a set value in the charge stage, and the charge-discharge capacitor discharges in the stimulation stage; the electric stimulation circuit is connected with the charge-discharge capacitor in the stimulation stage and is used for being connected with the electrode, and is used for releasing the stimulation current through the electrode under the drive of the charge-discharge capacitor, and the electric stimulation circuit comprises an equivalent capacitor; the limiting circuit is connected in series between the charge-discharge capacitor and the electric stimulation circuit and is used for adjusting the stimulation current released by the electric stimulation circuit. The current of the electric stimulation circuit can be adjusted, and the current of the electric stimulation circuit is not too large, so that the phenomenon that the voltage of the equivalent electric stimulation circuit is too large to generate larger transient current when electric stimulation starts is avoided, and the safety performance of the device is improved.
Description
Technical Field
The application relates to the technical field of electrical stimulation medical equipment, in particular to an electrical stimulation device.
Background
With the development of medical technology, nerve electric stimulation technology appears, and specific nerve groups of a patient can be regulated and controlled by stimulating the specific nerve groups of the patient through the nerve electric stimulation technology by current pulses to a certain extent, so that beneficial effects on the patient are achieved.
In order to timely perform electric stimulation on a patient in the traditional technology, the electric stimulation is more convenient, and an implanted electric stimulation device is generally adopted, but because of parasitic capacitance in the device, when electric stimulation starts each time, an electric stimulation circuit can generate transient current to charge the parasitic capacitance, so that transient peak value overlarge current can be generated, the current is far greater than normal electric stimulation current, a certain danger can be caused to the device and the patient, and the safety performance is low.
Disclosure of Invention
In view of the above, it is necessary to provide an electrical stimulation device capable of avoiding a transient current having a large peak value at the stage of starting electrical stimulation, thereby improving the safety performance of the device.
An electro-stimulation device, the device comprising: the working stage of the charge-discharge capacitor comprises a charge stage and a stimulation stage, the voltage of the charge-discharge capacitor is increased to a set value in the charge stage, and the charge-discharge capacitor discharges in the stimulation stage; the electric stimulation circuit is connected with the charge-discharge capacitor in the stimulation stage and is used for being connected with the electrode and used for releasing stimulation current through the electrode under the drive of the charge-discharge capacitor; and the limiting circuit is connected in series between the charge-discharge capacitor and the electric stimulation circuit and is used for adjusting the stimulation current released by the electric stimulation circuit.
In one embodiment, the limiting circuit includes: the grid electrode of the field effect tube is used for being connected with constant voltage, the drain electrode of the field effect tube is connected with the charge-discharge capacitor in the stimulation stage, and the source electrode of the field effect tube is connected with the electric stimulation circuit.
In one embodiment, the limiting circuit includes: and the base electrode of the triode is used for being connected with constant voltage, the collector electrode of the triode is connected with the first charging capacitor in the stimulation stage, and the emitter electrode of the triode is connected with the electric stimulation circuit.
In one embodiment, the limiting circuit includes: the variable resistance module is connected in series between the charge and discharge capacitor and the electric stimulation circuit; the input end of the control module is connected with the input end of the electric stimulation circuit, the output end of the control module is connected with the control end of the variable resistance module, and the control module is used for acquiring sampling voltage of the input end of the electric stimulation circuit and adjusting the resistance value of the variable resistance module according to the sampling voltage and a preset value acquired by the control module so as to adjust the stimulation current released by the electric stimulation circuit.
In one embodiment, the control module includes: the first input end of the comparator is connected with the input end of the electric stimulation circuit, the second input end of the comparator is used for receiving a reference signal with the preset value, and the comparator is used for outputting a control signal according to the relative magnitude of the preset value and the sampling voltage so as to adjust the resistance value of the variable resistance module and adjust the magnitude of the stimulation current released by the electric stimulation circuit.
In one embodiment, the control signal includes a high level signal and a low level signal; the comparator is used for outputting the high-level signal when the preset value is larger than or equal to the sampling voltage, and outputting the low-level signal when the preset value is smaller than the sampling voltage; the variable resistance module is further configured to decrease the resistance value by a unit value in each clock cycle when the high level signal is received, and increase the resistance value by a unit value in each clock cycle when the low level signal is received.
In one embodiment, the electrical stimulation circuit further comprises: a control unit for outputting a control signal; the voltage-controlled current source, the input of voltage-controlled current source with charge-discharge capacitor connects, the output of voltage-controlled current source with the electrode is connected, the control end of voltage-controlled current source with the control unit is connected, the voltage-controlled current source is used for according to control signal, output the stimulating current, stimulating current's size is adjusted by control signal.
In one embodiment, the electrical stimulation circuit includes an equivalent capacitance connected in parallel with the voltage-controlled current source; the limiting circuit is used for limiting the voltage value of the input end of the equivalent capacitor so as to adjust the stimulation current released by the electric stimulation circuit.
In one embodiment, the apparatus further comprises: the voltage source is connected with the limiting circuit and used for providing the constant voltage; and the boosting module is respectively connected with the voltage source and the charge-discharge capacitor and is used for converting the constant voltage into a voltage with a set value in the charging stage and providing the voltage for the charge-discharge capacitor.
In one embodiment, the apparatus further comprises: the first switch is connected in series between the boosting module and the charge-discharge capacitor and is used for being closed in the charging stage and being opened in the stimulating stage; and the second switch is connected in series between the electric stimulation circuit and the charge-discharge capacitor and is used for being opened in the charging stage and closed in the stimulation stage.
According to the electric stimulation device, the charge-discharge capacitor is arranged, the charge-discharge capacitor is charged in the charge-discharge stage of the charge-discharge capacitor, so that electric quantity is stored in the charge-discharge capacitor, and then in the stimulation stage, the electric stimulation circuit is arranged, so that the stimulation current can be released through the electrode under the driving of the charge-discharge capacitor, the electrode is contacted with the skin of a patient, and the stimulation current is applied to the body tissue of the patient, so that the effect of electric stimulation nerve regulation is realized. The charge-discharge capacitor is arranged to drive the electric stimulation circuit, so that the current direction of the charge-discharge capacitor in the charge stage is opposite to the current direction in the stimulation stage, accumulated charges can not be generated on the body tissues, the electric balance of the body tissues is ensured, the charge accumulation is avoided, and the safety performance of the equipment is improved. And then a limiting circuit connected in series between the charge-discharge capacitor and the electric stimulation circuit is arranged, so that the voltage of the electric stimulation circuit can be limited to a preset value, and the current generated by the electric stimulation circuit cannot be excessively large, thereby avoiding the generation of larger transient current due to the excessively large voltage in the electric stimulation circuit when the electric stimulation starts, and improving the safety performance of equipment.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of an electrical stimulation device in one embodiment;
FIG. 2 is a circuit diagram of an electrical stimulation device in one embodiment;
FIG. 3 is a circuit diagram of an electrical stimulation device in another embodiment;
FIG. 4 is a circuit diagram of an electrical stimulation device in yet another embodiment;
fig. 5 is a circuit diagram of an electro-stimulation device in yet another embodiment.
Reference numerals illustrate: the device comprises a 10-charge-discharge capacitor, a 20-electric stimulation circuit, a 30-limiting circuit, a 40-electrode, a 50-acting object, a 21-equivalent capacitor, a 22-voltage-controlled current source, a 23-control unit, a 31-field effect transistor, a 32-triode, a 33-variable resistance module, a 34-control module, a 35-comparator, a 60-voltage source, a 70-boosting module, a 80-first switch and a 81-second switch.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments should be understood as "electrical connection", "communication connection", and the like if there is transmission of electrical signals or data between objects to be connected.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
In one embodiment, as shown in fig. 1, there is provided an electro-stimulation device comprising: a charge-discharge capacitor 10, an electro-stimulation circuit 20, and a limiting circuit 30. Wherein:
the charge-discharge capacitor 10 is used for being connected with the electrode 40, the working stage of the charge-discharge capacitor 10 comprises a charge stage and a stimulation stage, the voltage of the charge-discharge capacitor 10 is increased to a set value in the charge stage, and the charge-discharge capacitor 10 discharges in the stimulation stage.
Specifically, the charge-discharge capacitor 10 is connected to the acting object 50 through the electrode 40, the acting object 50 may be a body tissue, and the electrode 40 contacts the skin of the body tissue of the patient, thereby being connected to nerve fibers in the patient, such as the sacral nerve and the tibial nerve of the patient, so as to apply an electrical stimulation signal to the body tissue, thereby achieving the effect of electrically stimulating nerve regulation. Because the nerve electrical stimulation treatment has the advantages of targeting, reversibility, lasting effect and the like, the electrical stimulation device can be implanted into the skin of a patient to perform continuous electrical stimulation treatment on the patient, so that the nerve electrical stimulation treatment is more convenient.
Specifically, when the charge/discharge capacitor 10 is charged, the charge current is small and thus smaller than the stimulus threshold, and although a current flowing through the object of action 50 is generated, the current does not reach the level of the stimulus current, and is not the stimulus current, but is negligible. And the charge-discharge capacitor 10 does not discharge all the electric quantity stored thereon in the stimulation stage, only a part of the electric quantity is discharged, and only the part of the electric quantity is needed to be supplemented in the charging stage, so that the current is small.
The electrical stimulation circuit 20 is connected to the charge-discharge capacitor 10 during the stimulation phase and is adapted to be connected to the electrode 40 for discharging the stimulation current through the electrode 40 under the drive of the charge-discharge capacitor 10.
Specifically, by providing the charge-discharge capacitor 10 as a power source for driving the electric stimulation circuit 20, the current direction of the charge-discharge capacitor 10 in the charge phase and the current direction in the stimulation phase can be made opposite, so that the current direction flowing through the acting object 50 is opposite in the charge phase and the stimulation phase, accumulation of electric charges can be effectively avoided, electric balance of the body tissue is ensured, it is important to ensure electric balance of the body tissue, and if the electric charges on the body tissue are not cancelled out by the opposite currents, residual electric charges are generally left on the electrode 40. Moreover, if the stimulation phase is repeated rapidly over several treatment cycles of the high frequency nerve stimulation procedure, residual charge on the electrode 40 may accumulate rapidly to dangerous levels (e.g., greater than 0.5 v) where chemical reactions may occur that may damage nerve fibers and surrounding tissue.
Specifically, as shown in fig. 2, the electro-stimulation circuit 20 includes an equivalent capacitor 21, where the equivalent capacitor 21 is a parasitic capacitor, or an equivalent capacitor of a parasitic capacitor and a filter capacitor. Since the parasitic capacitance is a capacitance from the electronic components, it is unavoidable that the parasitic capacitance is zero in the voltage on the parasitic capacitance because the power is not turned on in the charging stage, and the charge-discharge capacitance 10 is required to charge the parasitic capacitance when the electric stimulation circuit 20 is driven in the stimulation stage, so that the parasitic capacitance generates transient current under a large input voltage. Or if a filter capacitor is provided here, the parasitic capacitance and the equivalent capacitance of the filter capacitor will also generate the same transient current. However, although the filter capacitor may generate a peak value in a transient state at the beginning of the stimulation phase, the filter capacitor can filter the stimulation current when the circuit is stable, thereby improving the stability of the circuit.
The limiting circuit 30 is connected in series between the charge-discharge capacitor 10 and the electro-stimulation circuit 20, and is used for adjusting the magnitude of the stimulation current released by the electro-stimulation circuit.
The limiting circuit 30 is used to limit the voltage of the equivalent capacitor to a preset value to regulate the stimulation current, so as to avoid transient current peak at the beginning of the stimulation phase.
Specifically, the limiting circuit 30 is connected in series between the charge-discharge capacitor 10 and the electro-stimulation circuit 20, and the driving voltage generated by the discharge of the charge-discharge capacitor 10 is applied to the electro-stimulation circuit 20 after passing through the limiting circuit 30, so that the driving voltage is limited to a preset value by the limiting circuit 30, and the preset value is a voltage value that the equivalent capacitor 21 cannot generate excessive transient current, so that the excessive current of the transient peak value generated at the electrode 40 in the stimulation stage can be avoided, and the safety of the device is improved.
In this embodiment, by providing the charge-discharge capacitor 10, the charge-discharge capacitor 10 is charged in the charge phase of the charge-discharge capacitor 10, so that the charge-discharge capacitor 10 stores electric quantity, and then by providing the electric stimulation circuit 20 in the stimulation phase, the stimulating current can be released through the electrode 40 under the driving of the charge-discharge capacitor 10, and the electrode 40 contacts with the skin of the patient, so that the stimulating current is applied to the body tissue of the patient, and the effect of electrically stimulating the nerve regulation is achieved. The charge-discharge capacitor 10 is arranged to drive the electric stimulation circuit 20, so that the current direction of the charge-discharge capacitor 10 in the charge stage is opposite to the current direction in the stimulation stage, thereby ensuring that accumulated charges are not generated on the body tissues, ensuring the electric balance of the body tissues, avoiding charge accumulation and improving the safety performance of the equipment. Then, the limiting circuit 30 connected in series between the charge-discharge capacitor 10 and the electric stimulation circuit 20 is arranged, so that the voltage of the equivalent capacitor 21 can be limited to a preset value, and the current generated by the equivalent capacitor 21 under the voltage of the preset value is not excessively large, thereby avoiding the generation of larger transient current due to the excessively large voltage on the equivalent capacitor 21 when the electric stimulation starts, and improving the safety performance of the equipment.
In one embodiment, referring to FIG. 2, limiting circuit 30 comprises: a field effect transistor 31.
The grid electrode of the field effect tube 31 is used for being connected with a constant voltage, the drain electrode of the field effect tube 31 is connected with the charge-discharge capacitor 10 in the stimulation stage, and the source electrode of the field effect tube 31 is connected with the electric stimulation circuit 20.
Specifically, after the field effect transistor 31 is provided, the voltage across the equivalent capacitance 21 is calculated by the following formula:
V 2 ＝V dd -V gs
wherein V is 2 For the voltage across the equivalent capacitance 21, V dd Is of constant voltage, V gs Is the voltage between the gate and source of fet 31.
Since the FET 31 is turned on, V gs The voltage of (2) is always the on voltage of the FET 31, V after conduction gs Can be approximately considered as a constant, thereby by setting V dd And V gs Can be V 2 Is set to a fixed preset value. When the value of the stimulus current changes, the relationship between the magnitude of the stimulus current and the voltage across the equivalent capacitor 21 is shown as follows:
I＝k*(V dd -V 2 ) 2
wherein I is the value of the stimulating current, k is a coefficient, V 2 For the voltage across the equivalent capacitance 21, V dd Is a constant voltage.
Thus, when the value of the stimulus current is related to the square of the voltage across the equivalent capacitance 21, and therefore, the change in the value of the stimulus current has less influence on the voltage across the equivalent capacitance 21, it can be regarded as approximately constant, and thus, by providing the field effect transistor 31, the voltage value across the equivalent capacitance 21 can be fixed.
In this embodiment, the voltage of the equivalent capacitor 21 is limited to a preset value by setting the field effect transistor 31, so as to avoid the excessive current of the transient peak value generated by the equivalent capacitor 21, and improve the safety of the device.
In one embodiment, as shown in FIG. 3, limiting circuit 30 includes: transistor 32.
The base of the triode 32 is used for connecting a constant voltage, the collector 40 of the triode 32 is connected with the first charging capacitor in the stimulation stage, and the emitter of the triode 32 is connected with the electric stimulation circuit 20.
Specifically, the transistor 32 functions and principles in the same manner as the field effect transistor 31, and can fix the voltage value on the equivalent capacitor 21.
In this embodiment, the triode 32 is provided to limit the voltage of the equivalent capacitor 21 to a preset value, so as to avoid the excessive current of the transient peak value generated by the equivalent capacitor 21, and improve the safety of the device.
In one embodiment, as shown in fig. 4, the limiting circuit 30 includes: a variable resistance module 33, and a control module 34. Wherein:
the variable resistance module 33 is connected in series between the charge-discharge capacitor 10 and the electrical stimulation circuit 20.
Specifically, the variable resistance module 33 is connected in series between the charge-discharge capacitor 10 and the electric stimulation circuit 20 to function as a resistor, so that the voltage divided by the equivalent capacitor 21 can be adjusted by adjusting the resistance value of the variable resistance module 33, thereby limiting the voltage value of the equivalent capacitor 21.
The input end of the control module 34 is connected with the input end of the electric stimulation circuit 20, the output end of the control module 34 is connected with the control end of the variable resistance module 33, the control module 34 is used for obtaining the sampling voltage of the input end of the electric stimulation circuit 20, and the resistance value of the variable resistance module 33 is adjusted according to the sampling voltage and the preset value obtained by the control module 34 so as to adjust the stimulation current released by the electric stimulation circuit 20.
Specifically, an input terminal of the control module 34 is connected to an input terminal of the electrical stimulation circuit 20, so that a voltage value input by the electrical stimulation circuit 20 can be obtained. I.e. the sampled voltage value on the equivalent capacitor 21, and then comparing the sampled voltage value with a preset value, i.e. the control signal can be output. The resistance value of the variable resistance module 33 is adjusted until the sampled voltage value is equal to a preset value, thereby achieving a limitation of the voltage across the equivalent capacitance 21.
In this embodiment, the voltage on the equivalent capacitor 21 is monitored by the control module 34, and the resistance value of the variable resistance module 33 is adjusted according to the monitoring result, so that the voltage on the equivalent capacitor 21 is limited to a preset value, thereby avoiding the generation of excessive transient current.
In one embodiment, as shown in FIG. 5, the control module 34 includes: and a comparator 35.
A first input terminal of the comparator 35 is connected to an input terminal of the electrical stimulation circuit 20, a second input terminal of the comparator 35 is configured to receive a reference signal having a preset value, and the comparator 35 is configured to output a control signal according to a relative magnitude of the preset value and the sampling voltage, so as to adjust a resistance value of the variable resistance module 33, and adjust a magnitude of the stimulation current released by the electrical stimulation circuit 20.
Specifically, the control signal includes a high level signal and a low level signal. The comparator 35 is configured to output a high level signal when the preset value is greater than or equal to the sampling voltage, and to output a low level signal when the preset value is less than the sampling voltage. The variable resistance module 33 is further configured to decrease the resistance value by a unit value in each clock cycle when receiving the high level signal, and increase the resistance value by a unit value in each clock cycle when receiving the low level signal.
Specifically, the variable resistance module 33 is an electronic variable resistor, and the comparator 35 outputs a high-level signal when the preset value is greater than or equal to the sampling voltage, and the resistance of the variable resistance module 33 decreases by a unit value in each clock cycle when the variable resistance module 33 receives the high-level signal, so that the voltage division on the equivalent capacitor 21 is higher, and the sampling voltage increases until the sampling voltage is equal to the preset value. The comparator 35 outputs a low level signal when the preset value is smaller than the sampling voltage, and the variable resistance module 33 increases the resistance by a unit value in each clock cycle when receiving the low level signal, so that the voltage division on the equivalent capacitor 21 is lower, and the sampling voltage is reduced until the sampling voltage is equal to the preset value.
In the present embodiment, the adjustment of the voltage on the equivalent capacitance 21 is achieved by providing the comparator 35 and the variable resistance module 33, thereby limiting the voltage on the equivalent capacitance 21 to a preset value.
In one embodiment, referring still to fig. 2, electrical stimulation circuitry 20 further includes: control unit 23, voltage controlled current source 22. Wherein:
a control unit 23 for outputting a control signal.
Specifically, the control unit 23 may be a PWM (Pulse Width Modulation, pulse width modulation technique) signal generating circuit capable of outputting a PWM pulse control signal for controlling the magnitude of the stimulus current outputted by the voltage-controlled current source 22.
The input end of the voltage-controlled current source 22 is connected with the charge-discharge capacitor 10, the output end of the voltage-controlled current source 22 is connected with the electrode, the control end of the voltage-controlled current source 22 is connected with the control unit 23, the voltage-controlled current source 22 is used for outputting a stimulating current according to the control signal, and the size of the stimulating current is regulated by the control signal.
Specifically, an equivalent capacitance 21 is connected in parallel with a voltage-controlled current source 22. The limiting circuit 30 is used for limiting the voltage value of the input terminal of the equivalent capacitor 21 to adjust the magnitude of the stimulation current released by the electrical stimulation circuit 20.
Specifically, the input end of the voltage-controlled current source 22 is connected to the charge-discharge capacitor 10, the charge-discharge capacitor 10 is used for providing power to supply power to the voltage-controlled current source 22, the control end of the voltage-controlled current source 22 is connected to the control unit 23 and is used for receiving a control signal, the control signal is a voltage signal in PWM form, and the magnitude of the stimulating current output by the voltage-controlled current source 22 is determined by the control signal input by the control end, so that the magnitude of the stimulating current output by the voltage-controlled current source 22 can be adjusted by adjusting the magnitude of the control signal output to the voltage-controlled current source 22 when the voltage value at the first end of the equivalent capacitor 21 is limited to be a preset value, that is, when the supply voltage of the voltage-controlled current source 22 is unchanged. Thereby realizing the random adjustment of the stimulation current, and being convenient for being applicable to different electric stimulation regulation and control treatments.
Specifically, the output terminal of the voltage-controlled current source 22 is connected to the second terminal of the equivalent capacitor 21 and to the reference ground, which is the common reference potential of the electrical signal in the device.
In this embodiment, the control unit 23 and the voltage-controlled current source 22 are provided to realize the adjustment of the stimulation current, so that the stimulation current with any value can be output, and the device is convenient for different electrical stimulation regulation and control treatments.
In one embodiment, referring still to fig. 2, the apparatus further comprises: a voltage source 60.
A voltage source 60 is connected to the limiting circuit 30 for providing a constant voltage.
In the present embodiment, the voltage of the equivalent capacitor 21 is limited to a preset value by providing the voltage source 60 to supply a constant voltage to the limiting circuit 30.
In one embodiment, referring still to fig. 2, the apparatus further comprises: a boost module 70.
The boost module 70 is connected to the voltage source 60 and the charge-discharge capacitor 10, respectively, and is configured to provide a set voltage to the charge-discharge capacitor 10 during the charging phase.
In the present embodiment, the voltage provided by the voltage source 60 can be boosted to a desired set value by providing the voltage boosting module 70, thereby providing the set value voltage to the charge-discharge capacitor 10.
In one embodiment, referring still to fig. 2, the apparatus further comprises: a first switch 80, a second switch 81.
The first switch 80 is connected in series between the boost module 70 and the charge-discharge capacitor 10, and is configured to be closed during the charging phase and opened during the stimulating phase.
The second switch 81 is connected in series between the electric stimulation circuit 20 and the charge-discharge capacitor 10, and is configured to be opened during the charging phase and closed during the stimulation phase.
In the present embodiment, by providing the first switch 80 connected in series between the voltage boosting module 70 and the charge-discharge capacitor 10, providing the second switch 81 connected in series between the electro-stimulation circuit 20 and the charge-discharge capacitor 10, and the on-off periods of the first switch 80 and the second switch 81 are different, the division of the charge period and the stimulation period of the charge-discharge capacitor 10 is achieved. The device can continuously and periodically work repeatedly, and output the periodic stimulation current, so that the effect of electric stimulation treatment can be realized.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. An electro-stimulation device, the device comprising:
the working stage of the charge-discharge capacitor comprises a charge stage and a stimulation stage, the voltage of the charge-discharge capacitor is increased to a set value in the charge stage, and the charge-discharge capacitor discharges in the stimulation stage;
the electric stimulation circuit is connected with the charge-discharge capacitor in the stimulation stage and is used for being connected with the electrode and used for releasing stimulation current through the electrode under the drive of the charge-discharge capacitor;
and the limiting circuit is connected in series between the charge-discharge capacitor and the electric stimulation circuit and is used for adjusting the stimulation current released by the electric stimulation circuit.
2. The apparatus of claim 1, wherein the limiting circuit comprises:
the grid electrode of the field effect tube is used for being connected with constant voltage, the drain electrode of the field effect tube is connected with the charge-discharge capacitor in the stimulation stage, and the source electrode of the field effect tube is connected with the electric stimulation circuit.
3. The apparatus of claim 1, wherein the limiting circuit comprises:
and the base electrode of the triode is used for being connected with constant voltage, the collector electrode of the triode is connected with the first charging capacitor in the stimulation stage, and the emitter electrode of the triode is connected with the electric stimulation circuit.
4. The apparatus of claim 1, wherein the limiting circuit comprises:
the variable resistance module is connected in series between the charge and discharge capacitor and the electric stimulation circuit;
the input end of the control module is connected with the input end of the electric stimulation circuit, the output end of the control module is connected with the control end of the variable resistance module, and the control module is used for acquiring sampling voltage of the input end of the electric stimulation circuit and adjusting the resistance value of the variable resistance module according to the sampling voltage and a preset value acquired by the control module so as to adjust the stimulation current released by the electric stimulation circuit.
5. The apparatus of claim 4, wherein the control module comprises:
the first input end of the comparator is connected with the input end of the electric stimulation circuit, the second input end of the comparator is used for receiving a reference signal with the preset value, and the comparator is used for outputting a control signal according to the relative magnitude of the preset value and the sampling voltage so as to adjust the resistance value of the variable resistance module and adjust the magnitude of the stimulation current released by the electric stimulation circuit.
6. The apparatus of claim 5, wherein the control signal comprises a high level signal and a low level signal;
the comparator is used for outputting the high-level signal when the preset value is larger than or equal to the sampling voltage, and outputting the low-level signal when the preset value is smaller than the sampling voltage;
the variable resistance module is further configured to decrease the resistance value by a unit value in each clock cycle when the high level signal is received, and increase the resistance value by a unit value in each clock cycle when the low level signal is received.
7. The apparatus of claim 1, wherein the electrical stimulation circuit further comprises:
a control unit for outputting a control signal;
the voltage-controlled current source, the input of voltage-controlled current source with charge-discharge capacitor connects, the output of voltage-controlled current source with the electrode is connected, the control end of voltage-controlled current source with the control unit is connected, the voltage-controlled current source is used for according to control signal, output the stimulating current, stimulating current's size is adjusted by control signal.
8. The apparatus of claim 7, wherein the electrical stimulation circuit comprises an equivalent capacitance in parallel with the voltage controlled current source;
the limiting circuit is used for limiting the voltage value of the input end of the equivalent capacitor so as to adjust the stimulation current released by the electric stimulation circuit.
9. A device according to claim 2 or 3, characterized in that the device further comprises:
the voltage source is connected with the limiting circuit and used for providing the constant voltage;
and the boosting module is respectively connected with the voltage source and the charge-discharge capacitor and is used for converting the constant voltage into a voltage with a set value in the charging stage and providing the voltage for the charge-discharge capacitor.
10. The apparatus of claim 9, wherein the apparatus further comprises:
the first switch is connected in series between the boosting module and the charge-discharge capacitor and is used for being closed in the charging stage and being opened in the stimulating stage;
and the second switch is connected in series between the electric stimulation circuit and the charge-discharge capacitor and is used for being opened in the charging stage and closed in the stimulation stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210833453.7A CN117427273A (en) | 2022-07-15 | 2022-07-15 | Electrical stimulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210833453.7A CN117427273A (en) | 2022-07-15 | 2022-07-15 | Electrical stimulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117427273A true CN117427273A (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210833453.7A Pending CN117427273A (en) | 2022-07-15 | 2022-07-15 | Electrical stimulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117427273A (en) |
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2022
- 2022-07-15 CN CN202210833453.7A patent/CN117427273A/en active Pending
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