CN106075730A - A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection - Google Patents
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection Download PDFInfo
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- CN106075730A CN106075730A CN201610407269.0A CN201610407269A CN106075730A CN 106075730 A CN106075730 A CN 106075730A CN 201610407269 A CN201610407269 A CN 201610407269A CN 106075730 A CN106075730 A CN 106075730A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/004—Magnetotherapy specially adapted for a specific therapy
- A61N2/006—Magnetotherapy specially adapted for a specific therapy for magnetic stimulation of nerve tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/02—Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
Abstract
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, using small area analysis as the exciting current of coil, and around coil, produce satisfactory transient electromagnetic field by fast shut-off electric current raising current changing rate to reduce exciting current amplitude, and extend the actuation duration by the way of using multiple coils to cascade and discharge successively, realize the expansion of actuation duration, the cascade of the plurality of coil the mode discharged successively are that multiple coil bulk charge completes, discharge the most successively, or be that multiple coil is all switched by the discharge and recharge of coil in charging process, complete to circulate successively electric discharge.The invention enables the electromagnetic field excitation system using small area analysis as coil energizing current, it is achieved effective expansion of single activation time, and implementation method is simple, be easy to control or adjustment.
Description
Technical field
The present invention relates to a kind of electromagnetic excitation method, specifically, relate to a kind of realizing the time with multiple activation source class connection and opening up
The electromagnetic excitation method of exhibition, specifically the application in medical instrument is transcranial magnetic stimulation based on small area analysis.
Background technology
Transient electromagnetic field is referred to as transcranial magnetic stimulation (Transcranial in typical case's application of medical domain for one
Magnetic Stimulation, abbreviation: technology TMS).TMS is a kind of electrodeless stimulation form, and it is to utilize excitation coil
Produce time-varying magnetic field and induce electric current in targeted tissue, reach to stimulate excitable tissue's purpose.Line is encouraged when electric current flows through TMS
During circle, will produce time-varying magnetic field about, this powerful and fast-changing magnetic field can penetrate human body skin and skull etc.
Tissue is had an effect.Can stimulate nerve is first to be found when within 1896, observing mangneto phosphere by D ' Arsonval
, in the some time thereafter, Neural stem cell research is only limitted to mangneto flash of light.Brickford etc. are complete at nineteen sixty-five Neural stem cell
Rabbit, Rana nigromaculata and people time observe that skeletal muscle is twitched, but owing to not having clear and definite application purpose, further work is not opened
Exhibition.1985, Barker etc. used a small and exquisite magnetic coil under the pulse current less than 0.3Hz drives, and the most painless, non-invades
Stimulate normal brain cortex with entering, it was observed that hand muscle is twitched, recorded motor cortex induction with surface electrode at abductor of fifth finger
Current potential (MEPs), and attend in London to represent to all over the world in the electric and clinical nervous physiology conference of the 11st brain to show,
Challenging result causes sensation greatly, is referred to as transcranial magnetic stimulation (Transcranial Magnetic after this method
Stimulation, TMS).Amassian in 1987 etc., nineteen ninety Cohen etc. demonstrate what different directions was placed with experiment respectively
Stimulating coil causes different finger movement to corticocerebral effect.
Above-mentioned application electromagnetic field excitation system generally uses heavy current pulse to be driven, to obtain the transient electromagnetic needed
?.In order to obtain enough electromagnetic field intensities, excitation system driving electric current is big, pulse width big, excitation system hardware circuit merit
Consumption is big, realize difficulty, and exist the biggest potential safety hazard, the particularly application security of medical domain especially one can not neglect
Depending on major issue.
Big and the problem of safety for power consumption, the patent of Publication No. 102614592A proposes and replaces passing with small area analysis
Uniting the working method of big electric current, although the method overcomes power consumption and the problem of safety, but the low discharging current time is short, and it produces
It is not enough that raw transient electromagnetic field often also exists stimulation time, consequently, it is possible to be not enough to cause the problem of expection neural excitation, institute
To create again great limitation in terms of medical curative effect.
Summary of the invention
Present invention aims to the deficiencies in the prior art provide the one of a kind of safe and reliable, stimulation time length with
Multiple activation source class connection realizes the electromagnetic excitation method of time-scale extension, and the transient electromagnetic field in the present invention can stimulate the targets such as nerve
Medium and effectively extend the actuation duration.
The present invention is achieved through the following technical solutions: a kind of electromagnetic excitation side realizing time-scale extension with multiple activation source class connection
Method, using small area analysis as the exciting current of coil, and improves current changing rate to reduce exciting current by fast shut-off electric current
Amplitude thus around coil, produce satisfactory transient electromagnetic field, electromagnetic field excitation system by use multiple coils cascade
And the mode discharged successively extends the actuation duration, it is achieved the expansion of actuation duration.
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, its plurality of line
Circle cascade the mode discharged successively refer to: multiple coils of charging start electric discharge successively and equivalence extends the electric discharge end time,
In the most multiple coils, its electric discharge start time of n-th coil is tas, electric discharge finish time be tae, the N+1 its electric discharge of coil is opened
Moment beginning is tbs, electric discharge finish time be tbe, N is positive integer；Described tbsLag behind tasAnd tbeLag behind tae。
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, its described n-th
The coil discharge persistent period is t with the overlapping time of the N+1 coil discharge persistent periodab, tab=tbs-tae；Described tab0,
I.e. tbsIn advance in tae。
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, its described n-th
The coil discharge persistent period is t with the overlapping time of the N+1 coil discharge persistent periodab, tab=tbs-tae；Described tab=
0, i.e. tbsWith taeIt coincide.
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, its described n-th
The coil discharge persistent period is t with the overlapping time of the N+1 coil discharge persistent periodab, tab=tbs-tae；Described n-th
It is t that coil discharge produces induced voltage free damping time span to zero in destination mediar, tr0；Described tab0 and | tab
|≦tr。
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, its described n-th
Charging when coil starts to discharge or completing charging.
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention, its plurality of line
End electric current after coil starts the initial current before discharging and terminates electric discharge during circle cascade successively electric discharge is perseverance
Determine electric current.
It is applicable to the electromagnetism of a kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection of the present invention
Field excitation system, its described electromagnetic field excitation system includes interconnective coil, coil driver, coil driver bag
Include charging circuit, the discharge circuit being connected respectively with coil.Charging circuit and coils connected in series, discharge circuit and coils from parallel connection of coils.
Concrete, charging diode that described charging circuit includes being sequentially connected in series with coil, charging resistor, charge switch,
Described discharge circuit includes the series circuit of discharge resistance and the discharge diode being connected in parallel on coil two ends.
Preferably, described charge switch uses semiconductor switch device, the control pole of described semiconductor switch device and control
Signal circuit processed connects, and described peak absorbing circuit is parallel to charge switch two ends, for suppressing the spike shadow to circuit
Ring.
Electromagnetic field excitation method of the present invention is by adjusting the resistance value in the inductance value of coil and discharge circuit
Adjust discharge time, by adjusting the parameter adjustment current changing rate of discharge period in discharge circuit.
Further, described coil driver also includes the peak absorbing circuit being connected with coil.
Further, described electromagnetic field excitation system also includes the control signal electricity being connected respectively with coil driver
Road, system protection circuit, electric power system, described coil driver, coil, control signal circuit, system protection circuit, power supply
System is equipped with more than one, and the control signal circuit connected one to one with coil is also connected with control chip, controls core
Sheet sends control signal by control signal circuit respectively to corresponding coil, and the sequential of control signal is by computer software
Delay procedure controls.Multiple control signal circuit can share a control chip.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention uses small area analysis to instead of traditional big electric current, is guaranteed in terms of security performance；
(2) present invention uses the mode that coil cascades, and solves time-scale extension problem so that during to the stimulation of destination media
Between sufficient；
(3) can be different due to the discharge period of each coil in the present invention, although the initial current of each coil
All being constant current but current value can be different, although the end electric current of each coil is all constant current but current value can not
With, thus the present invention realize concrete operations that the actuation duration expands very flexibly, limiting factor (s) is few, facilitate implementation；
(4) its apparatus structure of electromagnetic field excitation system that the present invention relates to simply, the most portable.
Accompanying drawing explanation
Fig. 1 stimulates neural schematic diagram for simulation.
Fig. 2 time diagram of current attenuation in adjacent two coils when being A condition.
Fig. 3 time diagram of current attenuation in adjacent two coils when being B state.
Fig. 4 time diagram of current attenuation in adjacent two coils when being C-state.
Fig. 5 is the overall system architecture schematic diagram of the present invention.
Fig. 6 is core circuit schematic diagram of the present invention.
Fig. 7 is the system program flow chart of the present invention.
Wherein: 1 is neural, 2 n-th coils, 3 the N+1 coil, 4 coil drivers, 5 coils, 6
Control signal circuit, 7 system protection circuits, 8 electric power systems, 9 control signals.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
In order to improve the safety of electric current transcranial magnetic stimulation, the present invention has abandoned the big electric current width that conventional art generally uses
Pulse excitation scheme, then the exciting current using small area analysis as excitation coil.According to the ultimate principle of electromagnetic induction, change electricity
The magnetic field of changing of miscarriage, the galvanism that variation magnetic field excites in destination media and excitation coil current changing rate positive
Close.The present invention make use of this principle just, and the pulse current big with rate of change, amplitude is little replaces the arteries and veins that rate of change is little, amplitude is big
Rush electric current, reach identical effect of stimulation.
In actual applications, often there is the problem that stimulation time is not enough, inventive solution by coil in small area analysis
It it is to extend the actuation duration by the way of using multiple coils to cascade and discharge successively, it is achieved the expansion of actuation duration.
Embodiment 1
As a example by two coil cascades: as it is shown in figure 1, utilize electric current in the n-th coil 2 of cascade, the N+1 coil 3
The transient magnetic field that decay produces stimulates neuropeptide 11.
The overall system architecture schematic diagram of the present invention is as it is shown in figure 5, this system can be subdivided into by a control chip 9 simultaneously
Two controlled overlap identical system, and wherein set of system includes coil driver 4 and is connected with coil driver 4 respectively
Coil 5, control signal circuit 6, system protection circuit 7, electric power system 8.Wherein coil driver 4 includes going here and there with coil 5
The charging circuit discharge circuit in parallel with coil 5 of connection and peak absorbing circuit, charging circuit, discharge circuit are respectively line
Circle 5 offer charging, discharge path, make the electric current changed in coil 5, and then produce the magnetic field of change.Control chip 9 is
DSP5509, in the work process of system, control chip 9 will produce two path control signal simultaneously, and controls two cover systems respectively,
Described control signal is pulse signal, and control chip 9 can also use dsp chip or the list of other models in actual applications
Sheet machine, FPGA (programmable gate array).Control signal circuit 6 utilizes the switching of control chip 9 control coil drive circuit 4.System
Blanket insurance protection circuit 8 is the most overheated and crosses the protection of stream, when in Circuits System, temperature is too high or Circuits System time electric current is excessive
Can be automatically switched off, quit work.Electric power system is 12V regulated power supply, but can also use the ripe skills such as switch in actual application
Art, is converted to the unidirectional current needed for system work by mains.
As shown in Figure 6, wherein power supply PWR is electric power system 8 to the core circuit of the present embodiment, and power supply PWR provides for system
12V regulated power supply (for illustrating its physical circuit in Fig. 6).Coil L1 corresponding diagram 5 overall system architecture schematic diagram coil 5.Electricity
Resistance R6, diode D5, variable resistance VR2, resistance R11, diode D10, NMOS tube Q4, GND, diode D11, electric capacity C4,
Diode D12, resistance R12 constitute coil driver 4, and wherein charging circuit includes the diode connected successively with coil L1
D5, variable resistance VR2, NMOS tube Q4, GND, wherein NMOS tube Q4 is as the charge switch of coil driver 4, electric discharge electricity
Road includes the series circuit being made up of resistance R6, resistance R11, diode D10 being parallel to coil L1 two ends, peak absorbing circuit
It is made up of diode D11, electric capacity C4, diode D12, resistance R12, its role is to suppress the spike impact on circuit.
Control signal circuit 6 include optocoupler U4 that signal input part is connected with signal input part and be connected with optocoupler U4 by three poles
The push-pull output circuit of pipe Q5, audion Q6, audion Q7, resistance R17, resistance R18 composition, wherein signal input part accesses
The pulse signal PAS of DSP5509 chip output-PULS, pulse signal PAS-PULS is input to push-pull output circuit through optocoupler U4,
It is input to the grid of NMOS tube Q4 in coil driver 4 eventually through resistance R15, thus controls drain electrode and the source of NMOS tube Q4
The on or off of pole, wherein optocoupler U4 plays the effect that signal inputs, exports, additionally optocoupler by the conversion of electric light electricity
It is mutually isolated between U4 input and output, and signal of telecommunication transmission has the features such as unipolarity, thus there is good electrical isolation capabilities
And capacity of resisting disturbance, belong to the low resistance element of current mode work due to the input of photo-coupler again, thus there is the strongest being total to
Mould rejection ability, push-pull output circuit is mainly used in strengthening driving force.This example core circuit is in addition to the above part
System protection circuit 8, system protection circuit 8 was stream and overheated protection, was realized the protection of whole system by relay,
Owing to protection circuit belongs to mature technology, and the improvement of the present invention is unrelated with protection circuit, therefore here is omitted, and protection is electric
The structure of road circuit.
The operation principle of this example circuit is, as the pulse signal PAS of DSP5509 chip output-When PULS is low level, light
Coupling U4 turns on, pulse signal PAS-PULS is input to push-pull output circuit through optocoupler U4 and amplifies and polarization reversion becomes high electricity
Flat, input the grid of NMOS tube Q4 afterwards, owing to NMOS tube is high conducting metal-oxide-semiconductor, when its grid input signal is high level
Its drain electrode and source conduction, such charging circuit is fully on, and coil L1 starts to charge up, when the pulse of DSP5509 chip output
Signal PAS-When PULS is high level, optocoupler U4 ends, and coil L1 starts electric discharge, current attenuation in coil L1 by discharge circuit
Transient electromagnetic field can be produced during change.Further, since time constant T=L/R of RL circuit, by adjusting the inductance of coil L1
Charging interval described in the resistance value i.e. adjustable of value and charging circuit, by adjusting inductance value and the electricity of discharge circuit of coil L1
Discharge time described in resistance i.e. adjustable.
It is given below that of the present invention a kind of to realize the electromagnetic excitation method of time-scale extension with multiple activation source class connection concrete
Current attenuation schematic diagram in n-th coil 2, the N+1 coil 3 in implementation process.
As shown in Figure 2, Figure 3, Figure 4, in figure, symbol description is as follows:
Ias: the initial current of n-th coil；
Iae: the end electric current of n-th coil；
Ibs: the initial current of N+1 coil；
Ibe: the end electric current of N+1 coil；
t0: initial time；
tas: the n-th coil discharge time started；
tae: the n-th coil discharge end time；
tad: the n-th coil discharge persistent period；
tbs: the N+1 coil discharge time started；
tbe: the N+1 coil discharge end time；
tbd: the N+1 coil discharge persistent period；
t2: terminate the time；
tab: n-th coil and the overlapping time of the N+1 each self discharge of coil, i.e. tab=tbs-tae；
tr: Recovery Time Objective.
Described n-th coil and the N+1 coil are adjacent two discharge coil and same take turns n-th in discharge process
Coil first discharges, discharge after the N+1 coil.If n-th coil and the N+1 coil are in the position of multiple coils centre, then
(i.e. t before n-th coil starts electric dischargeasMultiple coil may be had to have completed electric discharge before)；In like manner, at the N+1 coil
Start (i.e. t after electric dischargebsAfterwards), multiple coil may be had to continue to start electric discharge.
Described Recovery Time Objective trRefer to: certain coil discharge also produces induced voltage, this sensing in destination media
Voltage is the free damping time span to zero in destination media.Described trDifferent with destination media and status difference.
First, it is generally the case that the electric current after coil discharge terminates is 0, but does not make absolute requirement, as long as keep constant
?.Secondly, the initial current of multiple coils is not required for unanimously, as long as each self-sustaining is constant.And, n-th coil
Discharge period tadWith the N+1 coil discharge persistent period tbdThe most not requiring consistent, visual design needs to adjust.
As in figure 2 it is shown, t0TasTbsTaeTbeT2, now tab0, i.e. start decay when the electric current in n-th coil 2
Time the N+1 coil 3 start decay, after n-th coil 2 decay terminates, the N+1 coil 3 continues to decay, so can be in fact
The expansion of existing actuation duration.
As it is shown on figure 3, t0TasTbs=taeTbeT2, now tab=0, i.e. electric current in n-th coil 2 first starts to decline
Subtracting, while n-th coil 2 decay terminates, the N+1 coil 3 starts decay, when the N+1 coil 3 continues decay one section
Terminate after between, so can realize the expansion of actuation duration.
As shown in Figure 4, t0TasTaeTbsTbeT2And, now tab0, i.e. current attenuation in n-th coil 2 terminates
Electric current in rear the N+1 coil 3 starts decay, so can realize the expansion of actuation duration.
When C-state as shown in Figure 4 in adjacent two coils on the basis of the time diagram of current attenuation, if meeting
“t0TasTaeTbsTbeT2, tab0 and | tab|≦tr", the electric current in i.e. the N+1 coil 3 starts the time gap of decay
N-th coil 2 decay terminate time less than or equal to n-th coil 2 electric discharge produce induced voltage in destination media from
By decay to zero time, then can preferably realize the effect of Persistent Excitation.
After in n-th coil 2, the N+1 coil 3, electric current has all been decayed, system starts again to be charged it,
And again repeat above attenuation process.
Two pulse signals PAS in above example-The sequential of PULS is by the program being previously set in DSP5509 chip
Control, by adjusting pulse signal PAS-The sequential of PULS gets final product between moment and the coil 5 of control coil 5 charge and discharge
Discharge and recharge gap.
By that analogy, can arrange the cascade of three, four coils the most multiple as required, principle is ibid, it is achieved more
Expand for a long time.
Embodiment 2
The present embodiment does optimization further on the basis of embodiment 1: multiple coils of the present invention cascade is also put successively
The mode of electricity can be that multiple coil all discharges after charging complete one by one, it is also possible to is that multiple coil is all in charging process
In be circulated electric discharge by the discharge and recharge of coil switching.
As a example by two adjacent windings all discharged successively after charging complete: concrete system program flow chart such as Fig. 7
Shown in, first initializing clock, the two I/O mouths will being connected with control signal circuit on DSP5509 chip are set to high level
And time delay t1After treating system stability, two I/O mouths are set to low level, two coils are charged, charging complete the most simultaneously
The most again first I/O mouth being set to high level, the coil 5 in the circuit that first I/O mouth is connected starts current attenuation
And the transient magnetic field produced, the current attenuation in coil 5 in the circuit that first I/O mouth is connected complete after again by second
Individual I/O mouth is set to high level, and the coil 5 in the circuit that second I/O mouth is connected starts current attenuation the transition produced
Magnetic field, after the electric current in two coils 5 has all been decayed, program turns again to init state and i.e. enters next round work,
The most constantly circulation can realize the expansion of actuation duration.
As a example by two adjacent windings being all circulated electric discharge in charging process by the discharge and recharge switching of coil: logical
Cross the two pulse signals that software controls to send in control chip, when arranging that wherein a road signal is set to high level, another road
Signal is set to low level so that another coil charges during a coil discharge, i.e. real by the way of two coils are complementary
The most gapless circulation electric discharge of existing coil.
Other parts of the present embodiment are same as in Example 1, therefore repeat no more.
The above, be only presently preferred embodiments of the present invention, and the present invention not does any pro forma restriction, every depends on
Any simple modification of being made above example according to the technical spirit of the present invention, equivalent variations, each fall within the protection of the present invention
Within the scope of.
Claims (10)
1. realize an electromagnetic excitation method for time-scale extension with multiple activation source class connection, using small area analysis as the excitation of coil electricity
Stream, and improve current changing rate exciting current amplitude required for reducing by fast shut-off electric current, thus around coil
Produce satisfactory transient electromagnetic field, it is characterised in that: electromagnetic field excitation system by use multiple coils cascade and successively
The mode of electric discharge extends the actuation duration, it is achieved the expansion of actuation duration.
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection the most according to claim 1, its feature
It is: the cascade of the plurality of coil the mode discharged successively refer to: multiple coils of charging start electric discharge successively and equivalence is prolonged
The long discharge end time, in the most multiple coils, its electric discharge start time of n-th coil is tas, electric discharge finish time be tae, N+
1 its electric discharge start time of coil is tbs, electric discharge finish time be tbe, N is positive integer；Described tbsLag behind tasAnd tbeDelayed
In tae。
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection the most according to claim 2, its feature
It is: the described n-th coil discharge persistent period is t with the overlapping time of the N+1 coil discharge persistent periodab, tab=
tbs-tae；Described tab0, i.e. tbsIn advance in tae。
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection the most according to claim 2, its feature
It is: the described n-th coil discharge persistent period is t with the overlapping time of the N+1 coil discharge persistent periodab, tab=
tbs-tae；Described tab=0, i.e. tbsWith taeIt coincide.
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection the most according to claim 2, its feature
It is: the described n-th coil discharge persistent period is t with the overlapping time of the N+1 coil discharge persistent periodab, tab=
tbs-tae；It is t that described n-th coil discharge produces induced voltage free damping time span to zero in destination mediar, tr?
0；Described tab0 and | tab|≦tr。
A kind of electromagnetic excitation method realizing time-scale extension with multiple activation source class connection the most according to claim 1, its feature
It is: after during the cascade of the plurality of coil successively electric discharge, coil starts the initial current before discharging and terminates electric discharge
Terminate electric current and be constant current.
7. according to a kind of electromagnetic excitation side realizing time-scale extension with multiple activation source class connection described in any one of claim 1-6
Method, it is characterised in that: described electromagnetic field excitation system includes interconnective coil (5), coil driver (4), and coil drives
Galvanic electricity road (4) includes charging circuit, the discharge circuit being connected respectively with coil (5).
The most according to claim 7 being applicable to a kind of realizes the electromagnetic excitation method of time-scale extension with multiple activation source class connection,
It is characterized in that: by adjusting the resistance value i.e. adjustable discharge time in the inductance value of coil (5) and discharge circuit, by adjusting
The parameter adjustment current changing rate of discharge period in whole discharge circuit.
The most according to claim 7 being applicable to a kind of realizes the electromagnetic excitation method of time-scale extension with multiple activation source class connection,
It is characterized in that: described coil driver (4) also includes the peak absorbing circuit being connected with coil (5).
The most according to claim 7 being applicable to a kind of realizes the electromagnetic excitation method of time-scale extension with multiple activation source class connection,
It is characterized in that: described electromagnetic field excitation system also includes the control signal circuit being connected respectively with coil driver (4)
(6), system protection circuit (7), electric power system (8), described coil driver (4), coil (5), control signal circuit (6),
System protection circuit (7), electric power system (8) are equipped with more than one, and the control signal electricity connected one to one with coil (5)
Road (6) is also connected with control chip (9), and control chip (9) is sent out to corresponding coil (5) respectively by control signal circuit (6)
Going out control signal, the sequential of control signal is controlled by the delay procedure in computer software.
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| CN2089988U (en) * | 1991-01-16 | 1991-12-04 | 张立田 | Repeatedly dischararge type electronic igniter for petrol machine |
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| CN102614592A (en) * | 2012-04-13 | 2012-08-01 | 刘冀成 | Transient electromagnetic field excitation system for transcranial magnetic stimulation (TMS) in medical field |
| CN102727997A (en) * | 2012-06-25 | 2012-10-17 | 西安交通大学 | Double butterfly transcranial magnetic stimulation coil |
| US20150196772A1 (en) * | 2014-01-15 | 2015-07-16 | Neuronetics, Inc. | Magnetic stimulation coils and ferromagnetic components for reduced surface stimulation and improved treatment depth |
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- 2016-06-07 CN CN201610407269.0A patent/CN106075730B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089988U (en) * | 1991-01-16 | 1991-12-04 | 张立田 | Repeatedly dischararge type electronic igniter for petrol machine |
| CN201286940Y (en) * | 2008-01-25 | 2009-08-12 | 武汉依瑞德医疗设备新技术有限公司 | Via-skull magnetic field stimulator with multi stimulation coils |
| CN102614592A (en) * | 2012-04-13 | 2012-08-01 | 刘冀成 | Transient electromagnetic field excitation system for transcranial magnetic stimulation (TMS) in medical field |
| CN102727997A (en) * | 2012-06-25 | 2012-10-17 | 西安交通大学 | Double butterfly transcranial magnetic stimulation coil |
| US20150196772A1 (en) * | 2014-01-15 | 2015-07-16 | Neuronetics, Inc. | Magnetic stimulation coils and ferromagnetic components for reduced surface stimulation and improved treatment depth |
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