CN218485012U - Electrical stimulation device - Google Patents
Electrical stimulation device Download PDFInfo
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- CN218485012U CN218485012U CN202221839171.XU CN202221839171U CN218485012U CN 218485012 U CN218485012 U CN 218485012U CN 202221839171 U CN202221839171 U CN 202221839171U CN 218485012 U CN218485012 U CN 218485012U
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- 230000000638 stimulation Effects 0.000 title claims abstract description 156
- 239000003990 capacitor Substances 0.000 claims abstract description 124
- 238000007599 discharging Methods 0.000 claims abstract description 59
- 230000004936 stimulating effect Effects 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims description 21
- 230000005669 field effect Effects 0.000 claims description 13
- 230000007423 decrease Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 abstract description 15
- 230000003071 parasitic effect Effects 0.000 description 8
- 238000005424 photoluminescence Methods 0.000 description 7
- 210000005036 nerve Anatomy 0.000 description 6
- 238000011282 treatment Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 210000004126 nerve fiber Anatomy 0.000 description 2
- 230000001537 neural effect Effects 0.000 description 2
- 230000004007 neuromodulation Effects 0.000 description 2
- 230000009286 beneficial effect 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
- 238000011161 development Methods 0.000 description 1
- 239000007943 implant Substances 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
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 210000002972 tibial nerve Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The present application relates to an electrical stimulation device. The device comprises: the charging and discharging capacitor is used for being connected with the electrode, the working stage of the charging and discharging capacitor comprises a charging stage and a stimulating stage, the voltage of the charging and discharging capacitor is increased to a set value in the charging stage, and the charging and discharging capacitor discharges in the stimulating stage; the electrical stimulation circuit is connected with the charge-discharge capacitor in a stimulation stage, is used for being connected with the electrode and releasing stimulation current through the electrode under the driving of the charge-discharge capacitor, and comprises an equivalent capacitor; and the limiting circuit is connected between the charging and discharging capacitor and the electric stimulation circuit in series and is used for adjusting the magnitude of the stimulation current released by the electric stimulation circuit. The current of the electrical stimulation circuit can be adjusted, and the current of the electrical stimulation circuit cannot be overlarge, so that the phenomenon that when electrical stimulation is started, the voltage of the equivalent electrical stimulation circuit is overlarge to generate large transient current is avoided, and the safety performance of equipment 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, a nerve electrical stimulation technology appears, and a specific nerve group of a patient is stimulated by the nerve electrical stimulation technology with current pulses to a certain degree, so that the nerve of the patient can be regulated and controlled, and the beneficial effect on the patient is achieved.
In order to be able to in time carry out the electro photoluminescence to the patient among the conventional art, and make the electro photoluminescence more convenient, adopt implanted electrical stimulation equipment usually, but implanted electrical stimulation equipment is because there is parasitic capacitance's existence in the equipment, consequently, when every time electro photoluminescence begins, the electric current that the electric stimulation circuit can produce the transient state charges for parasitic capacitance, thereby can produce the too big electric current of peak value of transient state, this electric current is far greater than normal electric stimulation electric current, may cause certain danger to equipment and patient, the security performance is low.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide an electrical stimulation apparatus that can avoid a transient current having a large peak value at the start of electrical stimulation, thereby improving the safety of the device.
An electrical stimulation apparatus, the apparatus comprising: the charging and discharging capacitor is used for being connected with the electrode, the working stage of the charging and discharging capacitor comprises a charging stage and a stimulating stage, the voltage of the charging and discharging capacitor is increased to a set value in the charging stage, and the charging and discharging capacitor discharges in the stimulating stage; the electrical stimulation circuit is connected with the charge-discharge capacitor in the stimulation stage, is connected with the electrode, and is used for releasing stimulation current through the electrode under the driving of the charge-discharge capacitor; and the limiting circuit is connected between the charging and discharging capacitor and the electric stimulating circuit in series and is used for adjusting the magnitude of stimulating current released by the electric stimulating circuit.
In one embodiment, the limiting circuit comprises: and the grid electrode of the field effect tube is used for accessing 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 electrical stimulation circuit.
In one embodiment, the limiting circuit comprises: and the base electrode of the triode is used for accessing constant voltage, the collector electrode of the triode is connected with the charging and discharging capacitor in the stimulation stage, and the emitter electrode of the triode is connected with the electrical stimulation circuit.
In one embodiment, the limiting circuit comprises: a variable resistance module connected in series between the charge and discharge capacitor and the electrical stimulation circuit; the input end of the control module is connected with the input end of the electrical 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 the sampling voltage of the input end of the electrical stimulation circuit and adjusting the resistance value of the variable resistance module according to the sampling voltage and the preset value acquired by the control module so as to adjust the stimulation current released by the electrical stimulation circuit.
In one embodiment, the control module comprises: the first input end of the comparator is connected with the input end of the electrical stimulation circuit, the second input end of the comparator is used for receiving the reference signal with the preset value, and the comparator is used for outputting a control signal according to the relative size of the preset value and the sampling voltage so as to adjust the resistance value of the variable resistance module and adjust the size of the stimulation current released by the electrical stimulation circuit.
In one embodiment, 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 receiving the high level signal, and increase the resistance value by a unit value in each clock cycle when receiving the low level signal.
In one embodiment, the electrical stimulation circuit further comprises: a control unit for outputting a control signal; the input end of the voltage-controlled current source is connected with the charge-discharge capacitor, the output end of the voltage-controlled current source is connected with the electrode, the control end of the voltage-controlled current source is connected with the control unit, the voltage-controlled current source is used for outputting the stimulation current according to the control signal, and the magnitude of the stimulation current is adjusted by the control signal.
In one embodiment, the electrical stimulation circuit comprises 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 size of the stimulation current released by the electrical stimulation circuit.
In one embodiment, the apparatus further comprises: a voltage source connected to the limiting circuit for providing the constant voltage; and the boosting module is respectively connected with the voltage source and the charging and discharging capacitor and is used for converting the constant voltage into a voltage with a set value and supplying the voltage to the charging and discharging capacitor in the charging stage.
In one embodiment, the apparatus further comprises: the first switch is connected between the boosting module and the charging and discharging capacitor in series and used for being closed in the charging stage and being opened in the stimulation stage; and the second switch is connected between the electric stimulation circuit and the charging and discharging capacitor in series and is used for being switched off in the charging stage and being switched on in the stimulation stage.
Above-mentioned electro photoluminescence device through setting up charge and discharge electric capacity, charges for charge and discharge electric capacity in charge and discharge electric capacity's the stage of charging to make the electric quantity of having stored among the charge and discharge electric capacity, then in amazing stage, through setting up the electro photoluminescence circuit, can be under charge and discharge electric capacity's drive, through electrode release stimulating current, electrode and patient's skin contact, thereby exert stimulating current on patient's musculature, realize the effect of the neural regulation and control of electro photoluminescence. The charging and discharging capacitor is arranged to drive the electric stimulation circuit, so that the current direction of the charging and discharging capacitor in the charging stage is opposite to the current direction of the charging and discharging capacitor in the stimulation stage, accumulated charges cannot be generated on organism tissues, the electric balance of the organism tissues is guaranteed, the charge accumulation is avoided, and the safety performance of equipment is improved. Then, a limiting circuit connected in series between the charging and discharging capacitor and the electrical stimulation circuit is arranged, the voltage of the electrical stimulation circuit can be limited to a preset value, and the current generated by the electrical stimulation circuit cannot be overlarge, so that the phenomenon that when electrical stimulation is started, the voltage in the electrical stimulation circuit is overlarge to generate a large transient current is avoided, and the safety performance of equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the structure of an electrical stimulation apparatus in one embodiment;
FIG. 2 is a circuit diagram of an electrical stimulation apparatus in one embodiment;
FIG. 3 is a circuit diagram of an electrical stimulation apparatus in another embodiment;
FIG. 4 is a circuit diagram of an electrical stimulation apparatus in a further embodiment;
fig. 5 is a circuit diagram of an electrical stimulation apparatus in yet another embodiment.
Description of the reference numerals: 10-a charging and discharging capacitor, 20-an electrical stimulation circuit, 30-a limiting circuit, 40-an electrode, 50-an action object, 21-an equivalent capacitor, 22-a voltage-controlled current source, 23-a control unit, 31-a field effect tube, 32-a triode, 33-a variable resistance module, 34-a control module, 35-a comparator, 60-a voltage source, 70-a boosting module, 80-a first switch and 81-a second switch.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth 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 present 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, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
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 is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In one embodiment, as shown in fig. 1, there is provided an electrical stimulation apparatus comprising: a charging and discharging capacitor 10, an electrical stimulation circuit 20 and a limiting circuit 30. Wherein:
the charging and discharging capacitor 10 is used for being connected with the electrode 40, the working stage of the charging and discharging capacitor 10 comprises a charging stage and a stimulating stage, the voltage of the charging and discharging capacitor 10 is increased to a set value in the charging stage, and the charging and discharging capacitor 10 discharges in the stimulating stage.
Specifically, the charge and discharge capacitor 10 is connected with the acting object 50 through the electrode 40, the acting object 50 can be a body tissue, and the electrode 40 contacts the skin of the body tissue of the patient, so as to be connected to nerve fibers in the body of the patient, such as the sacral nerve and the tibial nerve of the patient, so that an electrical stimulation signal is applied to the body tissue, and the effect of electrical stimulation neuromodulation is achieved. Because nerve electrical stimulation treatment has advantages such as target, reversibility and effect persistence, adopt the electro photoluminescence device in this application can implant patient's skin, carry out lasting electrical stimulation treatment to the patient to it is more convenient.
Specifically, the charging/discharging capacitor 10 generates a current flowing through the action object 50 when the charging current is small and smaller than the stimulus threshold value during charging, but the current does not reach the level of the stimulus current and is not a stimulus current and can be ignored. In addition, the charging and discharging capacitor 10 does not discharge all the stored electricity during the stimulation phase, but only discharges a part of the stored electricity, and then only needs to replenish the part of the stored electricity during the charging phase, so that the current is small.
The electrical stimulation circuit 20 is connected with the charging and discharging capacitor 10 in the stimulation phase and is used for being connected with the electrode 40 and releasing stimulation current through the electrode 40 under the driving of the charging and discharging capacitor 10.
Specifically, by providing the charging/discharging capacitor 10 as a power source for driving the electrical stimulation circuit 20, the current direction of the charging/discharging capacitor 10 in the charging phase is opposite to the current direction in the stimulation phase, so that the current direction flowing through the acting object 50 in the charging phase and the stimulation phase is opposite, the accumulation of charges can be effectively avoided, the electrical balance of the body tissue can be ensured, and it is very important to ensure the electrical balance of the body tissue, and if the charges on the body tissue are not cancelled out by the opposite currents, the residual charges are usually left on the electrode 40. Moreover, if the stimulation phase is rapidly repeated over several treatment cycles of the high frequency neural stimulation program, the residual charge on the electrodes 40 may rapidly build up to a dangerous level (e.g., greater than 0.5 v) at which a chemical reaction may occur that may damage the nerve fibers and surrounding tissue.
Specifically, as shown in fig. 2, the electrical stimulation circuit 20 includes an equivalent capacitor 21, and the equivalent capacitor 21 is a parasitic capacitor, or an equivalent capacitor of the parasitic capacitor and a filter capacitor. Since the parasitic capacitance is a capacitance from among the electronic components, it is unavoidable that the voltage on the parasitic capacitance is zero in the charging phase because the power supply is not turned on, and the charging and discharging capacitance 10 also needs to be charged when driving the electrical stimulation circuit 20 in the stimulation phase, so that the parasitic capacitance generates a transient current under a large input voltage. Or a filter capacitor is provided here, the same transient current will be generated by the parasitic capacitance and the equivalent capacitance of the filter capacitor. However, although the filter capacitor may generate a peak in a transient state at the beginning of the stimulation phase, the filter capacitor may 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 charging and discharging capacitor 10 and the electrical stimulation circuit 20, and is used for adjusting the magnitude of the stimulation current released by the electrical stimulation circuit.
Illustratively, the limiting circuit 30 is used to limit the voltage of the equivalent capacitor to a predetermined value to adjust the magnitude of the stimulation current, thereby avoiding transient current spikes at the beginning of the stimulation phase.
Specifically, the limiting circuit 30 is connected in series between the charging and discharging capacitor 10 and the electrical stimulation circuit 20, the driving voltage generated by the discharging of the charging and discharging capacitor 10 passes through the limiting circuit 30 and is applied to the electrical stimulation circuit 20, so that the driving voltage is limited by the limiting circuit 30 and is limited at a preset value, and the preset value is a voltage value which enables the equivalent capacitor 21 not to generate an excessive transient current, so that an excessive transient current with an excessive peak value generated at the electrode 40 in a stimulation stage can be avoided, and the safety of the device is improved.
In this embodiment, by providing the charging/discharging capacitor 10, the charging/discharging capacitor 10 is charged at the charging stage of the charging/discharging capacitor 10, so that the charging/discharging capacitor 10 stores electric energy, and then by providing the electrical stimulation circuit 20 at the stimulation stage, the stimulation current can be released through the electrode 40 under the driving of the charging/discharging capacitor 10, and the electrode 40 is in contact with the skin of the patient, so that the stimulation current is applied to the body tissue of the patient, thereby achieving the effect of electrically stimulating the neuromodulation. The charging and discharging capacitor 10 is arranged to drive the electrical stimulation circuit 20, so that the current direction of the charging and discharging capacitor 10 in the charging stage is opposite to the current direction in the stimulation stage, accumulated charges cannot be generated on the organism tissue, the electrical balance of the organism tissue is guaranteed, the charge accumulation is avoided, and the safety performance of the device is improved. Then, the limiting circuit 30 connected in series between the charging and discharging capacitor 10 and the electrical 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 cannot be too large, thereby avoiding the generation of a large transient current caused by the too large voltage on the equivalent capacitor 21 when electrical stimulation is started, and improving the safety performance of the device.
In one embodiment, continuing to refer to fig. 2, the limiting circuit 30 includes: a field effect transistor 31.
The gate of the field effect transistor 31 is used for connecting a constant voltage, the drain of the field effect transistor 31 is connected with the charge and discharge capacitor 10 in the stimulation phase, and the source of the field effect transistor 31 is connected with the electrical 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 2 Is the voltage, V, across the equivalent capacitance 21 dd Is a constant voltage, V gs Is the voltage between the gate and source of the fet 31.
Since the FET 31 is turned on, V gs Is always the turn-on voltage of the FET 31, V after conduction gs Can be approximately regarded as a constant, so that by setting V dd And V gs A value of (a) that is V 2 Set to a fixed preset value. When the value of the stimulation current changes, the relationship between the magnitude of the stimulation current and the voltage on the equivalent capacitor 21 is shown as the following formula:
I＝k*(V dd -V 2 ) 2
wherein I is the value of the stimulation current, k is the coefficient, V 2 Is the voltage on the equivalent capacitor 21, V dd Is a constant voltage.
Therefore, when the value of the stimulus current is related to the square of the voltage on the equivalent capacitor 21, the change in the value of the stimulus current has little influence on the voltage on the equivalent capacitor 21 and can be considered approximately constant, and the voltage value on the equivalent capacitor 21 can be fixed by providing the fet 31.
In this embodiment, the voltage of the equivalent capacitor 21 is limited to a preset value by the field effect transistor 31, so that the equivalent capacitor 21 is prevented from generating a transient current with an excessively large peak value, and the safety of the device is improved.
In one embodiment, as shown in FIG. 3, the limiting circuit 30 includes: transistor 32.
The base of transistor 32 is used to receive a constant voltage, the collector 40 of transistor 32 is connected to the charging and discharging capacitor 10 during the stimulation phase, and the emitter of transistor 32 is connected to the electrical stimulation circuit 20.
Specifically, transistor 32 functions and principles the same as fet 31, and is capable of fixing the voltage value across equivalent capacitor 21.
In this embodiment, the voltage of the equivalent capacitor 21 is limited to a preset value by the transistor 32, so that the equivalent capacitor 21 is prevented from generating an excessive transient current at the peak, and the safety of the device is improved.
In one embodiment, as shown in fig. 4, the limiting circuit 30 includes: variable resistance module 33, control module 34. Wherein:
the variable resistance module 33 is connected in series between the charge and 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 electrical stimulation circuit 20 and functions as a resistor, so that the voltage division of the circuit can be adjusted by adjusting the resistance value of the variable resistance module 33, the voltage divided by the equivalent capacitor 21 can be adjusted, and the voltage value of the equivalent capacitor 21 can be limited.
The input end of the control module 34 is connected with the input end of the electrical stimulation circuit 20, the output end of the control module 34 is connected with the control end of the variable resistance module 33, and the control module 34 is used for acquiring the sampling voltage at the input end of the electrical stimulation circuit 20 and adjusting the resistance value of the variable resistance module 33 according to the sampling voltage and the preset value acquired by the control module 34 so as to adjust the magnitude of the stimulation current released by the electrical stimulation circuit 20.
Specifically, the input terminal of the control module 34 is connected to the input terminal of the electrical stimulation circuit 20, so that the voltage value input by the electrical stimulation circuit 20 can be obtained. Namely, the sampled voltage value on the equivalent capacitor 21, and then the sampled voltage value is compared with a preset value, so as to output a control signal. The resistance value of the variable resistance module 33 is adjusted until the sampled voltage value equals the preset value, thereby achieving the limitation of the voltage on the equivalent capacitor 21.
In the embodiment, the voltage across the equivalent capacitor 21 is monitored by the control module 34, and the resistance of the variable resistance module 33 is adjusted according to the monitoring result, so that the voltage across the equivalent capacitor 21 is limited to a preset value, thereby avoiding generating an excessive transient current.
In one embodiment, as shown in FIG. 5, the control module 34 includes: a comparator 35.
A first input terminal of the comparator 35 is connected to the 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 between 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 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 a high level signal, and increase the resistance value by a unit value in each clock cycle when receiving a low level signal.
Specifically, the variable resistance module 33 is an electronic variable resistor, the comparator 35 outputs a high level signal when the preset value is greater than or equal to the sampling voltage, and the variable resistance module 33 decreases the resistance by a unit value in each clock cycle when receiving the high level signal, so that the divided voltage on the equivalent capacitor 21 is higher, and the sampling voltage is increased until the sampling voltage is equal to the preset value. When the preset value is smaller than the sampling voltage, the comparator 35 outputs a low level signal, and when the variable resistance module 33 receives the low level signal, the resistance rises by a unit value in each clock cycle, 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 embodiment, the comparator 35 and the variable resistance module 33 are arranged to regulate the voltage on the equivalent capacitor 21, so as to limit the voltage on the equivalent capacitor 21 to a preset value.
In one embodiment, with continued reference to fig. 2, the electrical stimulation circuit 20 further comprises: a control unit 23, a voltage controlled current source 22. Wherein:
and a control unit 23 for outputting a control signal.
Specifically, the control unit 23 may be a PWM (Pulse Width Modulation) signal generating circuit, and is capable of outputting a PWM Pulse control signal, where the PWM Pulse control signal is used to control the magnitude of the stimulation current output 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 the stimulation current according to the control signal, and the magnitude of the stimulation current is adjusted by the control signal.
Specifically, the equivalent capacitor 21 is connected in parallel with the voltage-controlled current source 22. The limiting circuit 30 is used for limiting the voltage value of the input end of the equivalent capacitor 21 so as 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 configured to provide a power supply 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 configured to receive a control signal, the control signal is a voltage signal in a PWM form, and the magnitude of the stimulation 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 stimulation 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 under the condition that the voltage value at the first end of the equivalent capacitor 21 is limited to a preset value and is not changed, that is, under the condition that the supply voltage of the voltage-controlled current source 22 is not changed. Therefore, the stimulation current can be adjusted at will, and the device is suitable for different electrical stimulation regulation 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 a reference ground, which is a common reference potential of the electrical signals in the present apparatus.
In this embodiment, the control unit 23 and the voltage-controlled current source 22 are arranged to adjust the magnitude of the stimulation current, so that the stimulation current with any value can be output, and the device is suitable for different electrical stimulation regulation treatments.
In one embodiment, with continued reference 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, by providing the voltage source 60, a constant voltage is supplied to the limiting circuit 30, so that the voltage of the equivalent capacitor 21 is limited to a preset value.
In one embodiment, with continued reference to fig. 2, the apparatus further comprises: a boost module 70.
And the boosting module 70 is respectively connected with the voltage source 60 and the charging and discharging capacitor 10, and is used for providing a voltage with a set value to the charging and discharging capacitor 10 in a charging stage.
In the present embodiment, the voltage boost module 70 is provided to boost the voltage supplied from the voltage source 60 to a desired set value, thereby supplying the set value voltage to the charge/discharge capacitor 10.
In one embodiment, with continued reference to fig. 2, the apparatus further comprises: a first switch 80 and a second switch 81.
And a first switch 80 connected in series between the boost module 70 and the charge and discharge capacitor 10 for being closed during the charging phase and being opened during the stimulation phase.
And a second switch 81 connected in series between the electrical stimulation circuit 20 and the charging and discharging capacitor 10, and configured to be open during the charging phase and closed during the stimulation phase.
In the present embodiment, by providing the first switch 80 in series between the voltage boosting module 70 and the charge and discharge capacitor 10, and providing the second switch 81 in series between the electrical stimulation circuit 20 and the charge and discharge capacitor 10, and the on and 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 and discharge capacitor 10 is realized. The device can continuously and periodically work repeatedly, and the output of the periodic stimulating current is realized, so that the effect of electrical stimulation treatment can be realized.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean 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, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (10)
1. An electro-stimulation device, characterized in that it comprises:
the charging and discharging capacitor is used for being connected with the electrode, the working stage of the charging and discharging capacitor comprises a charging stage and a stimulating stage, the voltage of the charging and discharging capacitor is increased to a set value in the charging stage, and the charging and discharging capacitor discharges in the stimulating stage;
the electrical stimulation circuit is connected with the charge-discharge capacitor in the stimulation stage, is connected with the electrode, and is used for releasing stimulation current through the electrode under the driving of the charge-discharge capacitor;
and the limiting circuit is connected between the charging and discharging capacitor and the electric stimulating circuit in series and is used for adjusting the magnitude of stimulating current released by the electric stimulating circuit.
2. The apparatus of claim 1, wherein the limiting circuit comprises:
and the grid electrode of the field effect tube is used for accessing 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 electrical stimulation circuit.
3. The apparatus of claim 1, wherein the limiting circuit comprises:
and the base electrode of the triode is used for accessing constant voltage, the collector electrode of the triode is connected with the charging and discharging capacitor in the stimulation stage, and the emitter electrode of the triode is connected with the electrical stimulation circuit.
4. The apparatus of claim 1, wherein the limiting circuit comprises:
a variable resistance module connected in series between the charge and discharge capacitor and the electrical stimulation circuit;
the input end of the control module is connected with the input end of the electrical 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 the sampling voltage of the input end of the electrical stimulation circuit and adjusting the resistance value of the variable resistance module according to the sampling voltage and the preset value acquired by the control module so as to adjust the stimulation current released by the electrical 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 electrical stimulation circuit, the second input end of the comparator is used for receiving the reference signal with the preset value, and the comparator is used for outputting a control signal according to the relative size of the preset value and the sampling voltage so as to adjust the resistance value of the variable resistance module and adjust the size of the stimulation current released by the electrical 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 receiving the high level signal, and increase the resistance value by a unit value in each clock cycle when receiving the low level signal.
7. The apparatus of claim 1, wherein the electrical stimulation circuit further comprises:
a control unit for outputting a control signal;
the input end of the voltage-controlled current source is connected with the charging and discharging capacitor, the output end of the voltage-controlled current source is connected with the electrode, the control end of the voltage-controlled current source is connected with the control unit, the voltage-controlled current source is used for outputting the stimulating current according to the control signal, and the magnitude of the stimulating current is adjusted by the control signal.
8. The apparatus of claim 7, wherein the electrical stimulation circuit comprises 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 size of the stimulation current released by the electrical stimulation circuit.
9. The apparatus of claim 2 or 3, further comprising:
a voltage source connected to the limiting circuit for providing the constant voltage;
and the boosting module is respectively connected with the voltage source and the charging and discharging capacitor and is used for converting the constant voltage into a voltage with a set value and supplying the voltage to the charging and discharging capacitor in the charging stage.
10. The apparatus of claim 9, further comprising:
the first switch is connected between the boosting module and the charging and discharging capacitor in series and used for being closed in the charging stage and being opened in the stimulation stage;
and the second switch is connected between the electrical stimulation circuit and the charging and discharging capacitor in series and is used for being opened in the charging stage and closed in the stimulation stage.
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| CN202221839171.XU CN218485012U (en) | 2022-07-15 | 2022-07-15 | Electrical stimulation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221839171.XU CN218485012U (en) | 2022-07-15 | 2022-07-15 | Electrical stimulation device |
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| CN218485012U true CN218485012U (en) | 2023-02-17 |
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