CN103311878A - Bipolar electrical stimulation protection device - Google Patents
Bipolar electrical stimulation protection device Download PDFInfo
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- CN103311878A CN103311878A CN2013101444113A CN201310144411A CN103311878A CN 103311878 A CN103311878 A CN 103311878A CN 2013101444113 A CN2013101444113 A CN 2013101444113A CN 201310144411 A CN201310144411 A CN 201310144411A CN 103311878 A CN103311878 A CN 103311878A
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Abstract
The invention discloses a bipolar electrical stimulation protection device, which comprises a power supply circuit, an on-off control circuit, a differential amplification circuit, a current limiting regulating circuit and a comparator circuit, wherein the on-off control circuit realizes the sampling on signals and controls the output and the switching-off of stimulation signals, the differential amplification circuit amplifies the signals sampled by the on-off control circuit, the comparator circuit compares the sampling signals amplified by the differential amplification circuit to the voltage input by the current limiting regulating circuit, and the on-off control circuit switches off the output of the stimulation signals when the comparator circuit outputs high voltage. When a load (patient) carries out bipolar electrical stimulation, and the current flowing through the load (patient) exceeds a certain current value, the bipolar electrical stimulation signals are directly cut off, and in addition, the state is locked, so the output of the bipolar electrical stimulation is stopped, and the effective and safe protection is realized on the patient. The bipolar electrical stimulation protection device has the advantages that the structure is simple, the use is convenient, and the safety factor is high.
Description
Technical field
The present invention relates to the bipolar electrical stimulation Instrument technology field, be specifically related to a kind of bipolar electrical stimulation protective device.
Background technology
Electrostimulation is a kind of physical therapy method commonly used, commonly used is the square wave electrostimulation at present, this is because rising and the fall off rate of square wave current are high, wave amplitude can reach maximal stimulus within moment, also can be reduced to zero, and the waveform rule of square wave both had been conducive to grasp stimulus intensity, also was conducive to measurements and calculations.In concrete operations, the wave amplitude of electrostimulation, ripple is wide, string is long, and the indexs such as program and the time interval all can arbitrarily be adjusted, and it namely can be used for skin and survey pain, also can be used for the mensuration of peripheral nerve and central nervous system, except producing the pain perception, also produce feeling of numbness.In order to reduce heat that stimulating current causes and electrolysis to the impact of organism as far as possible, stimulate under the effective prerequisite keeping, must shorten the time as much as possible; And to adopt bipolar square wave to stimulate.Latter's characteristics are: ion move to a direction when positive square wave, be right after and the losing side ripple ion is moved round about, can greatly reduce electrolysis like this.
At present; to the electrical stimulation current overload protection; mainly be flow measurement resistance of series connection in output loop; obtain the pulse voltage signal that is directly proportional with stimulating current at this resistance; this signal send D/A converter behind photoelectric coupling, controller Real-time Collection size of current is when stimulating current surpasses the value of a setting; overload protecting circuit can stop the output of boost pulse combiner circuit, thus the injury that assurance avoids fortuitous event that patient is caused.The general effective prerequisite of electrical stimulation current overload protection is: the control software systems are working properly, D/A converter is working properly, constant current control switch plumber does normally; in fact the situation of this three parts abnormal is very common, therefore will greatly reduce the reliability of its security performance.
A kind of electrical stimulation current overload protection arrangement is arranged in addition, adopt accurate zero shift current sense amplifier Real-Time Monitoring size of current, the comparator output switching activity of control back behind the overcurrent, the cut off circuit that consists of by metal-oxide-semiconductor comes deenergization.This protective circuit has a plurality of deficiencies:
1, the collection of this kind current overload protection circuit is unidirectional square wave, and the square wave stimulus signal that is mostly positive negative bipolar of now electric stimulating instrument output, this kind current foldback circuit can't gather the bipolarity electric current.
2, the power supply of current overload protection circuit is provided by external power source, and the reliability of circuit has just descended, if external power source not normally then protective circuit can't work.
What 3, protective circuit adopted the cut-out of electric current is metal-oxide-semiconductor, and this control mode need to remain on always and apply specific level on the metal-oxide-semiconductor, the poor reliability of this mode.
What 4, protective circuit adopted the detection of electric current is current sense amplifier, and price is high, and circuit is complicated.
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Summary of the invention
The object of the invention is to for above deficiency; a kind of bipolar electrical stimulation overcurrent protective device is proposed; when the bipolar square wave bipolar electrical stimulation is carried out in load (patient); when the electric current that flows through load (patient) surpasses certain current value; directly cut off the bipolar electrical stimulation signal and lock this state; thereby stop the output of pain bipolar electrical stimulation, the patient is realized carrying out the protection of effective and safe.
Purpose of the present invention is achieved through the following technical solutions:
A kind of bipolar electrical stimulation protective device, it comprises: power circuit, control on-off circuit, differential amplifier circuit, current limliting regulating circuit and comparator circuit, power circuit are connected with comparator circuit with control on-off circuit, differential amplifier circuit, current limliting regulating circuit respectively; The control on-off circuit is used for realizing that the input of control on-off circuit connects the bipolar square wave stimulus signal to the sampling of bipolar square wave stimulus signal and output and the cut-out of control bipolar square wave stimulus signal; Differential amplifier circuit is connected with the control on-off circuit, and the signal of control on-off circuit sampling is amplified; The current limliting regulating circuit is used for the use needs according to the bipolar electrical stimulation device, regulates the Current Control threshold value of overload; The input of comparator circuit connects the output of differential amplifier circuit and the output of current limliting regulating circuit, and the sampled signal after differential amplifier circuit is amplified and the voltage of current limliting regulating circuit output compare; The control on-off circuit also is connected with comparator circuit, and during the comparator circuit output HIGH voltage, the control on-off circuit cuts off the output of bipolar square wave stimulus signal.
Further optimize, described power circuit converts the part of bipolar square wave stimulus signal to positive-negative power voltage, for whole bipolar electrical stimulation protective device provides positive-negative power, does not need external power supply, and this device just can work.
Further optimize, described control on-off circuit comprises rectification silicon bridge, sample resistance, optical coupler, thyristor and triode, first input port of rectification silicon bridge is as the input of bipolar square wave stimulus signal, second relative input port is as the output of bipolar square wave stimulus signal, be connected between the third and fourth remaining port of silicon bridge after the collector and emitter of triode and the sample resistance series connection, play the effect of switch, if described triode is in cut-off state, then sample resistance place branch road disconnects, and the bipolar square wave stimulus signal can't be exported; The collector electrode of the phototriode in the collector electrode of described triode and the described optical coupler links to each other, the emitter of the phototriode in the emitter of triode and the optical coupler links to each other, if the light-emitting diode in the optical coupler has irradiation, phototriode conducting in the optical coupler, triode is also with regard to conducting, and the bipolar square wave stimulus signal just can output to output; If the light-emitting diode in the optical coupler is without irradiation, the phototriode in the optical coupler ends, and triode is just cut-off also, and then sample resistance place branch road disconnects, and the bipolar square wave stimulus signal can't be exported; Light-emitting diode in thyristor and the optical coupler is in parallel, if the thyristor conducting, then the light-emitting diode in the optical coupler flows through with regard to no current, and is not luminous, and the output of bipolar square wave stimulus signal is truncated.
Further optimize, described control on-off circuit also comprises indicator light, is used to indicate whether to be in over-current state; Indicator light is in parallel with the light-emitting diode in the optical coupler, and during lumination of light emitting diode in the optical coupler, the bipolarity stimulus signal is normally exported, and indicator light is bright, is shown as normal operating conditions.
Further optimize, described control on-off circuit also comprises button, between the control end that is connected to thyristor and ground, and after button is pressed, thyristor control end ground connection, thyristor changes cut-off state into by conducting state.
This bipolar electrical stimulation overcurrent protective device adopts bipolar square wave to change out this stimulation of direct-current power supply protective circuit, does not need external power supply just can work.This bipolar electrical stimulation overcurrent protective device employing rectification silicon bridge and sample resistance are realized the sampling to bipolar square wave, and no matter are positive level or negative level, and the voltage direction that sampling obtains is consistent.This voltage is realized sampling through differential amplifier circuit, output voltage and the reference voltage of differential amplifier circuit compare in comparator circuit, when surpassing reference voltage, comparator output high level, thereby control thyristor conducting, thyristor conducting control optical coupler disconnects, and the disconnection of rectification silicon bridge is controlled again in the disconnection of optical coupler, thus the cut-out of control stimulus signal.Because thyristor is that the control level once inside out just can change conducting into by cut-off state, and also can keep this conducting state after control level is thorough, thereby keep the disconnection of bipolar electrical stimulation signal.
This bipolar electrical stimulation overcurrent protective device employing rectification silicon bridge and sample resistance are realized the sampling to bipolar square wave, and no matter are positive level or negative level, and the voltage direction that sampling obtains is consistent.Adopt thyristor to control the break-make of optical coupler, the break-make of optical coupler is controlled again the through and off of rectification silicon bridge, thus output and the cut-out of control stimulus signal.Because thyristor is that the control level once inside out just can change conducting into by cut-off state, and after control level is thorough, also can keep this conducting state.The current limliting regulating circuit can be according to the clinical use needs of different bipolar electrical stimulation devices, and the Current Control threshold value of change control overload is to adapt to various crowd.
In a word; compared with prior art, the present invention has following beneficial effect and advantage: the present invention is a kind of fully independently protective device, and is easy to use; can be used as optional equipment and existing multiple bipolar electrical stimulation equipment connection use, can start the effect of overcurrent protection.The present invention realizes that overcurrent protection is not subjected to the impact of any other control circuit (containing software), D/A or switching tube; This circuit utilizes the square wave stimulus signal to produce positive-negative power, does not also need external power source to provide power supply, the Reliability Enhancement of work.In addition, the switch that forms by thyristor and optical coupler directly cuts off the output of bipolar electrical stimulation signal, and the locking next state, and coefficient of safety is high; Have indicator light to indicate whether to be in over-current state, the method for the state of resuming work is simple, and pushing button gets final product.Can be according to the clinical use needs of different electrostimulation, the Current Control threshold value of change control overload is to adapt to various crowd.
Description of drawings
Fig. 1 is for using principle schematic of the present invention.
Fig. 2 is the composition frame chart of bipolar electrical stimulation overcurrent protective device in the execution mode.
Fig. 3 is power circuit module circuit diagram in the execution mode.
Fig. 4 is the circuit diagram of bipolar electrical stimulation overcurrent protective device in the execution mode.
Fig. 5 is positive level stimulus signal transmission schematic diagram.
Fig. 6 is negative level stimulus signal transmission schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and example enforcement of the present invention is described further, but enforcement of the present invention and protection are not limited to this.
As shown in Figure 1, the bipolar electrical stimulation instrument has two outputs, and the bipolar square wave output is the first electrode interface 1 for first output, and earth signal is i.e. the second electrode interface 2 of second output.Two outputs respectively are connected to an electrode when originally using, and human body is implemented bipolar electrical stimulation.This bipolar electrical stimulation overcurrent protective device is connected between bipolarity bipolar electrical stimulation instrument and two electrode slices, can realizes the effect of current-limiting protection.Method of attachment is: the input IN of this bipolar electrical stimulation overcurrent protective device is that the first electrode interface 1 links to each other with the bipolar square wave output of bipolar electrical stimulation instrument, and the earth signal end of this bipolar electrical stimulation overcurrent protective device is that the second electrode interface 2 links to each other with the ground end of bipolar electrical stimulation instrument.Two output OUT A and the OUT B of this bipolar electrical stimulation overcurrent protective device respectively are connected to an electrode slice.First output OUT A exports the bipolar electrical stimulation signal, when electric current during greater than set point, can cut off the output of bipolar electrical stimulation signal.Second output OUT B is earth signal.
As shown in Figure 2, bipolar electrical stimulation instrument overcurrent protective device is made of power circuit, control on-off circuit, differential amplifier circuit, current limliting regulating circuit and comparator circuit.The bipolar square wave stimulus signal that is input to circuit is divided into two-way, and one the tunnel enters power circuit, and another road enters the control on-off circuit.Power circuit converts the part of ambipolar square-wave signal to positive-negative power voltage, for whole current-limiting protection circuit provides positive-negative power.The control on-off circuit utilizes rectification silicon bridge to realize two functions, and the one, sampling current changes into the voltage at sample resistance two ends, and the direction of voltage remains unchanged; The 2nd, realize cut-out to the bipolar electrical stimulation signal according to the output of comparator circuit.The voltage at sampling resistor two ends is input in the differential amplifier circuit and is gathered in the control on-off circuit, the effect of differential amplifier circuit is, gather the sample resistance both end voltage, and the ohmically electric current of split-stream sampling not, because the input resistance of differential amplifier circuit is very high.The voltage that differential amplifier circuit collects is input in the comparator circuit, compares with the reference voltage of current limliting regulating circuit, controls the output of comparator.If be higher than stop voltage, comparator is output as height, and control signal outputs in the control on-off circuit, controls the output of blocking the bipolar electrical stimulation signal.The effect of current limliting regulating circuit is to utilize slide rheostat to produce adjustable reference voltage, thereby changes the current limit value of setting.This reference voltage is input in the comparator circuit, as a comparison the reference voltage of device circuit.
As shown in Figure 3, power circuit is by diode (D1, D2), resistance (R1, R2, R3, R4), and electric capacity (C1, C2, C3, C4) and voltage stabilizing didoe (D3, D4) form.Among the figure; the positive voltage filter circuit of square wave (being made of D1, R1, R3, C1, C2) becomes direct voltage to positive square wave signal filtering, and the 3rd voltage stabilizing didoe D3 of back plays the effect of voltage stabilizing; produce stable positive voltage, this positive supply provides positive supply for current foldback circuit.The negative voltage filter circuit of square wave (being consisted of by D2, R2, R4, C3, C4) wherein; the signal filtering of losing side ripple is become direct voltage; the 4th voltage stabilizing didoe D4 of back plays the effect of voltage stabilizing, produces stable negative voltage, and this negative supply provides negative supply for current foldback circuit.
As shown in Figure 4, the control on-off circuit is made of rectification silicon bridge, NPN triode Q1, NPN optical coupler U1, resistance (R6, R13), diode (D5, D6, D7), thyristor U3 and button key.Sample resistance R5 is connected to an end of rectification silicon bridge, connects simultaneously an end of 10K Europe the 9th resistance R 9, and the other end of the 9th resistance R 9 is connected to the inverting input of amplifier U2A.Sample resistance R5 is connected to an end of triode Q1 emitter, connects simultaneously an end of 10K Europe the tenth resistance R 10, and the other end of the tenth resistance R 10 is connected to the in-phase input end of amplifier U2A.The collector and emitter of triode Q1 and sample resistance R5 are cascaded, and play the effect of switch, if Q1 disconnects, stimulus signal can't be exported.The collector electrode of the phototriode in the collector electrode of triode Q1 and the optical coupler links to each other, and the emitter of the phototriode in the emitter of triode Q1 and the optical coupler links to each other.Light-emitting diode in thyristor U3 and the optical coupler is in parallel.
As shown in Figure 4, the 8th resistance R 8 one end ground connection of differential amplifier circuit, the other end is received the in-phase input end of amplifier, and 10K resistance R 10 is connected between inverting input and the output.The output of amplifier U2A is connected to the in-phase input end of amplifier U2B,
As shown in Figure 4, the current limliting regulating circuit is by the 8th voltage stabilizing didoe D8,3.3K Europe resistance R 14, and 51K Europe resistance R 11,50K Europe adjustable resistance Rv1 forms.The end ground connection of 50K Europe adjustable resistance Rv1, the other end is connected to an end of 51K Europe resistance R 11, and the other end of 51K Europe resistance R 11 is connected to an end of 3.3K Europe resistance R 14, and the other end of 3.3K Europe resistance R 14 is connected to power supply V+.The anodic bonding of voltage stabilizing didoe D8 is to ground, and negative electrode is connected to the common port of 3.3K Europe resistance R 14 and 51K Europe resistance R 11.The sliding end of adjustable resistance RV1 is connected to the inverting input of amplifier U2B.The voltage of the sliding end of adjustable resistance RV1 is for limiting the size of current set point.Regulate adjustable resistance and just can regulate the limit value of bipolar electrical stimulation electric current.
Fig. 5 and Fig. 6 are the schematic diagrames of the control on-off circuit simplified.The operation principle of control on-off circuit is described below in conjunction with Fig. 5, Fig. 6.As shown in Figure 5, when the positive level of square wave was come, electric current flow through wherein two diodes (D11 and D13) and sample resistance R5 by the direction of dotted line.Electric current flows through sample resistance R5 from top to down, and ambipolar square wave is inputted into from the IN input, outputs to output OUT B end through silicon bridge.
As shown in Figure 6, when the negative level of square wave was come, electric current flow through wherein two diode D12 and D14 by the direction of dotted line, and sample resistance R5.Electric current flows through sample resistance R5 from top to down.Ambipolar square wave is inputted into by the IN input, outputs to output OUT B end through silicon bridge.
The voltage of OUT B output is that the voltage of input IN deducts the conduction voltage drop of two diodes and the pressure drop on the sample resistance R5, because R5 is very little for sample resistance, the circuit that ambipolar square wave consists of by this rectification silicon bridge and sample resistance R5, seldom the amplitude of just reducing is just in the output of output OUT B end, and holding what obtain at OUT B is the bipolar square wave that amplitude has reduced a bit a little.OUT B connects an electrode slice, and earth signal connects the another one electrode slice, and these two electrode slices are placed in it the patient, can carry out bipolar electrical stimulation.From circuit, can see that electric current on the sample resistance R5 is exactly the electric current of human body of flowing through, realized sampling, and be that the positive level of square wave or the electric current that negative level produces at sample resistance R5 all are from top to bottom, the voltage of sample resistance R5 upper end just is higher than lower terminal voltage always, so just makes things convenient for amplification and the comparison of back.
From Fig. 5 and Fig. 6, can see if sample resistance R5 place branch road is disconnected, the positive level of square-wave signal can't arrive OUT B end by this circuit, and the negative level of square-wave signal can't arrive OUT B end by this circuit, and the bipolar electrical stimulation signal can't be exported.Here it is, and this circuit is realized the principle of bipolar electrical stimulation signal cutout.
As shown in Figure 4, the collector and emitter of triode Q1 and sample resistance R5 are cascaded, and play the effect of switch, if Q1 is in cut-off state, then sample resistance R5 place branch road disconnects, and stimulus signal can't be exported.The collector electrode of the phototriode in the collector electrode of triode Q1 and the optical coupler links to each other, the emitter of the phototriode in the emitter of triode Q1 and the optical coupler links to each other, if the light-emitting diode in the optical coupler has irradiation, phototriode conducting in the optical coupler, triode Q1 is also with regard to conducting, and ambipolar square wave stimulus signal just can output to output.If the light-emitting diode in the optical coupler is without irradiation, the phototriode in the optical coupler ends, and triode Q1 is just cut-off also, and then sample resistance R5 place branch road disconnects, and stimulus signal can't be exported.
As shown in Figure 4, the light-emitting diode in thyristor U3 and the optical coupler is in parallel, if thyristor U3 conducting, then the light-emitting diode in the optical coupler flows through with regard to no current, and is not luminous, and stimulus signal output is truncated.
Voltage on the sample resistance R5 is through differential amplifier circuit, and multiplication factor is 1, and the effect of differential amplifier circuit is, gathers the sample resistance both end voltage, and the ohmically electric current of split-stream sampling not, because the input resistance of differential amplifier circuit is very high.The reference voltage of the output voltage of differential amplifier circuit and current limliting regulating circuit compares, if be higher than stop voltage, comparator is output as height, the thyristor conducting, then the light-emitting diode in the optical coupler flows through with regard to no current, and is not luminous, and stimulus signal output is truncated.
When thyristor ended, namely electric current did not surpass set point, when the bipolar electrical stimulation signal is normally exported, and indicator light light-emitting diode D7 bright light.Thyristor U3 and indicator light light-emitting diode D7 are in parallel, when electric current surpasses set point, and the thyristor conducting, the bipolar electrical stimulation signal is truncated, and the effect of indicating operating status is played in indicator light light-emitting diode D7 light on and off.
When electric current surpassed set point, the thyristor conducting when bipolar electrical stimulation signal is truncated, and kept this state, at this moment will rework, as long as push button, thyristor just is cut off, and electrical stimulation signal just recovers output.
Below, illustrate the course of work of whole system.The bipolar square wave signal of input, the one tunnel is input to power circuit produces positive-negative power, and this positive-negative power is other module for power supply of whole circuit.The bipolar square wave signal of input, another road enters the control on-off circuit, sample resistance R5 flows through, sample resistance R5 both end voltage size has namely characterized the size of stimulating current, this sampling voltage is taken a sample by differential amplifier circuit, then pass in the comparator circuit, and the reference voltage that the current limliting regulating circuit provides relatively.If stimulating current is excessive, namely sample resistance R5 both end voltage is excessive, and namely sampling voltage is excessive, then comparator circuit output high level.This high level passes to the control end of thyristor U3, makes thyristor U3 conducting.Because the light-emitting diode among thyristor U3 and the optical coupler U1 is in parallel, thyristor U3 conducting, cause the light-emitting diode no current in the optical coupler to flow through, phototriode cut-off in the optical coupler, triode Q1 is just cut-off also, then sample resistance R5 place branch road disconnects, and stimulus signal can't be exported, and locks this state.Thyristor U3 and indicator light light-emitting diode D7 are in parallel, when electric current surpasses set point, and the thyristor conducting, the bipolar electrical stimulation signal is truncated, and the effect of indicating operating status is played in indicator light light-emitting diode D7 light on and off.At this moment to recover the output of stimulus signal, the key that only need to push button, button key is pressed, and thyristor U3 is set to cut-off.Because the light-emitting diode among thyristor U3 and the optical coupler U1 is in parallel, thyristor U3 cut-off, cause the light-emitting diode conducting in the optical coupler, there is electric current to flow through, namely there is illumination to be mapped to phototriode in the optical coupler, make the phototriode conducting, triode Q1 is also with regard to conducting, and ambipolar square wave stimulus signal just can output to output.
Claims (5)
1. bipolar electrical stimulation protective device, it is characterized in that comprising: power circuit, control on-off circuit, differential amplifier circuit, current limliting regulating circuit and comparator circuit, power circuit are connected with comparator circuit with control on-off circuit, differential amplifier circuit, current limliting regulating circuit respectively; The control on-off circuit is used for realizing that the input of control on-off circuit connects the bipolar square wave stimulus signal to the sampling of bipolar square wave stimulus signal and output and the cut-out of control bipolar square wave stimulus signal; Differential amplifier circuit is connected with the control on-off circuit, and the signal of control on-off circuit sampling is amplified; The current limliting regulating circuit is used for the use needs according to the bipolar electrical stimulation device, regulates the Current Control threshold value of overload; The input of comparator circuit connects the output of differential amplifier circuit and the output of current limliting regulating circuit, and the sampled signal after differential amplifier circuit is amplified and the voltage of current limliting regulating circuit output compare; The control on-off circuit also is connected with comparator circuit, and during the comparator circuit output HIGH voltage, the control on-off circuit cuts off the output of bipolar square wave stimulus signal.
2. a kind of bipolar electrical stimulation protective device according to claim 1 is characterized in that described power circuit converts the part of bipolar square wave stimulus signal to positive-negative power voltage, for whole bipolar electrical stimulation protective device provides positive-negative power.
3. a kind of bipolar electrical stimulation protective device according to claim 1, it is characterized in that described control on-off circuit comprises rectification silicon bridge, sample resistance, optical coupler, thyristor and triode, first input port of rectification silicon bridge is as the input of bipolar square wave stimulus signal, second relative input port is as the output of bipolar square wave stimulus signal, be connected between the third and fourth remaining port of silicon bridge after the collector and emitter of triode and the sample resistance series connection, play the effect of switch, if described triode is in cut-off state, then sample resistance place branch road disconnects, and the bipolar square wave stimulus signal can't be exported; The collector electrode of the phototriode in the collector electrode of described triode and the described optical coupler links to each other, the emitter of the phototriode in the emitter of triode and the optical coupler links to each other, if the light-emitting diode in the optical coupler has irradiation, phototriode conducting in the optical coupler, triode is also with regard to conducting, and the bipolar square wave stimulus signal just can output to output; If the light-emitting diode in the optical coupler is without irradiation, the phototriode in the optical coupler ends, and triode is just cut-off also, and then sample resistance place branch road disconnects, and the bipolar square wave stimulus signal can't be exported; Light-emitting diode in thyristor and the optical coupler is in parallel, if the thyristor conducting, then the light-emitting diode in the optical coupler flows through with regard to no current, and is not luminous, and the output of bipolar square wave stimulus signal is truncated.
4. a kind of bipolar electrical stimulation protective device according to claim 3 is characterized in that described control on-off circuit also comprises indicator light, is used to indicate whether to be in over-current state; Indicator light is in parallel with the light-emitting diode in the optical coupler, and during lumination of light emitting diode in the optical coupler, the bipolarity stimulus signal is normally exported, and indicator light is bright, is shown as normal operating conditions.
5. according to claim 3 or 4 described a kind of bipolar electrical stimulation protective devices; it is characterized in that described control on-off circuit also comprises button, between the control end that is connected to thyristor and ground, after button is pressed; thyristor control end ground connection, thyristor changes cut-off state into by conducting state.
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| CN104474634A (en) * | 2014-12-12 | 2015-04-01 | 杭州爱司米医疗器械有限公司 | Gradual refining method for preventing electrotherapy signal from saturating |
| CN107505858A (en) * | 2017-08-10 | 2017-12-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Control circuit, control method and device, electronic equipment |
| CN108904973A (en) * | 2018-04-26 | 2018-11-30 | 李珍 | It is a kind of for electrotherapy when protect bio-safety method and equipment |
| CN109861511A (en) * | 2018-12-30 | 2019-06-07 | 惠州华科电器有限公司 | Current foldback circuit and Over Current Protection System |
| CN111727070A (en) * | 2017-11-17 | 2020-09-29 | 万能量子飞跃技术有限公司 | Device for electrical and magnetic tissue stimulation |
| CN115421533A (en) * | 2022-10-09 | 2022-12-02 | 奥然生物科技（上海）有限公司 | Electric heating temperature control system with dual protection function |
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| CN203218855U (en) * | 2013-04-24 | 2013-09-25 | 华南理工大学 | Bipolar electrical simulation protection apparatus |
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| CN104474634A (en) * | 2014-12-12 | 2015-04-01 | 杭州爱司米医疗器械有限公司 | Gradual refining method for preventing electrotherapy signal from saturating |
| CN104474634B (en) * | 2014-12-12 | 2017-12-12 | 杭州爱司米医疗器械有限公司 | A kind of progressively fine method for preventing electrotherapy signal saturation |
| CN107505858A (en) * | 2017-08-10 | 2017-12-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Control circuit, control method and device, electronic equipment |
| CN111727070A (en) * | 2017-11-17 | 2020-09-29 | 万能量子飞跃技术有限公司 | Device for electrical and magnetic tissue stimulation |
| CN108904973A (en) * | 2018-04-26 | 2018-11-30 | 李珍 | It is a kind of for electrotherapy when protect bio-safety method and equipment |
| CN109861511A (en) * | 2018-12-30 | 2019-06-07 | 惠州华科电器有限公司 | Current foldback circuit and Over Current Protection System |
| CN115421533A (en) * | 2022-10-09 | 2022-12-02 | 奥然生物科技（上海）有限公司 | Electric heating temperature control system with dual protection function |
| CN115421533B (en) * | 2022-10-09 | 2024-02-23 | 奥然生物科技（上海）有限公司 | Electric heating temperature control system with double protection functions |
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