CN103816006A - Non-implantation equipment for stimulating blind people's visual perception through human body surface - Google Patents
Non-implantation equipment for stimulating blind people's visual perception through human body surface Download PDFInfo
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Abstract
The invention discloses non-implantation equipment for stimulating blind people's visual perception through the human body surface. The equipment comprises a master control module, an input module, at least one stimulating current generating module and an output module. The input module is connected to the master control module and used for receiving the a setting signal related to the frequency and/or amplitude of current input by a user. Each stimulating current generating module is connected to the master control module and used for generating at least one group of stimulating current under the control of the master control module, wherein the stimulating current is superposition of low-frequency pulse current with low-frequency pulse current or superposition of low-frequency pulse current with medium-frequency pulse current. The output module is connected to each stimulating current generating module and comprises a plurality groups of non-implantation electrodes which are in contact with the human body surface. The stimulating current is output from the electrodes and stimulates blind people to generate photoreception through the body surface. The equipment is safe, reliable and low in cost.
Description
Technical field
The present invention relates to biomedical engineering technology field, relate in particular to the equipment that a kind of non-implantation excites blind visual to experience through body surface.
Background technology
The mankind externally provide by vision in the information of the understanding approximately 90% in the world, normal complete vision is to produce like this: the optical system of eyes is imaged on extraneous object on retina, picture signal is converted to bioelectrical signals by photoreceptor cell，photosensory cell on retina, then after cell membrane neutral net is carried out preliminary treatment, be transmitted to brain visual cortex by optic nerve fiber, brain visual cortex is processed by bioelectrical signals again that obtain and perception produces vision.Any one link of pathways for vision sustains damage or pathological changes all can cause blind, for example: retinitis pigmentosa, maculopathy, the blind problem that moderate and severe degree of amblyopia and other diseases blinding or wound are brought.According to the international low vision of WHO1973 and grade scale (preferably correcting defects of vision) blindly: 3 grades of <0.05～0.02 blindly, or radius of view <10 degree; 4 grades of blindness <0.02～light sensations, or radius of view <5 degree; 5 grades of blindness no light perceptions.
In numerous cures, utilize the scheme of the visual cell enforcement electricity irritation that implanted chip and electrode pair retina are remaining can make patient's vision obtain recovery to a certain extent.According to implant electrode position difference, can be divided on stimulating visual cortex, optic nerve, retina and the lower 4 kinds of schemes of retina.Its principle is the artificial analog vision signal of telecommunication, connects the meticulous visual system of human body and carries out stimulus of direct current conduction, makes visual cortex produce the excitement that similar light stimulation based retinal causes, to excite effective phosphene.For example, application number is that 200610025215.4 Chinese invention patent application discloses a kind of implantable sheet type optic nerve micro stimulating electrode, it stimulates optic nerve fiber, the stimulating current that optic nerve fiber produces stimulator is transmitted to visual cortex, make visual cortex produce the excitement producing after similar light stimulation based retinal, thereby generation phosphene, and can record the current potential of optic nerve fiber.Application number is a kind of phosphene generating apparatus and the method thereof that 200910197192.9 Chinese invention patent application discloses emulation prosthese vision, and it can obtain the simulation result that approaches practical situation, and can meet the needs of multiparameter experiment.Be entitled as the Master's thesis of studying for the microelectrode of retina reparation and designed the active flexible retina of a kind of long-term implanted and optic nerve stimulation electrode, and make the stable in properties of electrode, there is good biocompatibility, can long-term work and be difficult for body corrosion.But the solution of above-mentioned implanted is from effect, artificial vision can only provide and be confined in certain limit individual useful visual experience, do not comprise the full details of the vision of regenerating, as color, the degree of depth, quality structure etc., its damage to visual system can not be ignored, and operation also has potentiality risk, except impact is attractive in appearance, also exist mental pressure large, the problems such as costly.
Summary of the invention
The technical problem to be solved in the present invention is, has risk, costly defect for the above-mentioned implantation electrode of prior art, provides a kind of risk is low and expense is low non-implantation to excite the equipment of blind visual impression through body surface.
The technical solution adopted for the present invention to solve the technical problems is: construct the equipment that a kind of non-implantation excites blind visual to experience through body surface, comprising:
Main control module;
Input module, it is connected in described main control module, and for receiving user's signalization relevant with frequency electric current and/or amplitude input;
At least one stimulating current generation module, it is connected in described main control module, and under the control of described main control module, produce at least one group of stimulating current according to described signalization, described stimulating current is the stack of low frequency pulse current and low frequency pulse current or low frequency pulse current and medium-frequency pulse electric current;
Output module, it is connected in described at least one stimulating current generation module, and described output module comprises the non-implantation electrode of many groups, and described electrode contacts with body surface, and described stimulating current excites blind person to produce photoreception from described electrode output through body surface.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, described stimulating current is the stack of the low frequency pulse current of frequency below 60Hz and other low frequency pulse current; Or,
Described stimulating current is the low frequency pulse current of frequency below 60Hz and the stack of medium-frequency pulse electric current.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, one group of non-implantation electrode comprises two electrodes that contact with the body surface of circumference of eyes respectively.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, one group of non-implantation electrode comprises an electrode contacting with eyelid and an electrode contacting with hindbrain body surface.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, described electrode is Corneal electrode, to excite blind person to produce photoreception by cornea.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, in the non-implantation electrode of described many groups, respectively organize the stimulating current of non-implantation electrode output different frequency and/or different amplitudes.
Excite in the equipment of blind visual impression the stimulating current of one group of non-implantation electrode gap certain hour ground output different frequency and/or different amplitudes through body surface in non-implantation of the present invention.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, described equipment also comprises many group color lamp groups, and every group of color lamp group produces a kind of monochromatic light and excite for blind person being carried out to a kind of monochromatic light vision.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, described equipment also comprises intense light source, and described intense light source produces high light and excites for blind person is carried out to daylight vision.
Excite in the equipment of blind visual impression through body surface in non-implantation of the present invention, described equipment also comprises display module, it is connected in described main control module, and for showing configuration information and the stimulating current information relevant with the frequency of electric current and/or amplitude.
Implement technical scheme of the present invention, the present invention is by the stimulating current through stack of the different amplitudes of micro-control technology export and/or different frequency, and act on body surface by electrode, so that blind person produces photoreception, the visual experience of for example colourama and image, and, the electrode of this non-implantation, can safe noninvasive mode realizing blind person recovers lost eyesight, and can promote more in a short time recover lost eyesight after vision, reach basic living and take care of oneself or the vision level of orthobiosis, therefore, safe and reliable, and cost is lower.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the non-implantation of the present invention excites the apparatus embodiments one of blind visual impression logic chart through body surface;
Fig. 2 is the schematic diagram of input module embodiment mono-in Fig. 1;
Fig. 3 is the circuit diagram of main control module embodiment mono-in Fig. 1;
Fig. 4 is the circuit diagram that a frequency of Fig. 1 medium frequency generation unit produces subelement;
Fig. 5 is the partial circuit figure of amplitude generation unit embodiment mono-in Fig. 1;
Fig. 6 is the partial circuit figure of amplitude generation unit embodiment mono-in Fig. 1;
To be the non-implantation of the present invention excite the circuit diagram of power amplification unit and overcurrent protection module embodiment mono-in the equipment of blind visual impression through body surface to Fig. 7;
To be the non-implantation of the present invention excite the prize circuit diagram of lamp control module and driver module embodiment mono-of the equipment of blind visual impression through body surface to Fig. 8.
The specific embodiment
Being combined in while reading following description and above claim with reference to accompanying drawing of the operational approach of the relevant elements of objects, features and characteristic of the present invention and structure and function and parts will become more obvious.Will understand clearly accompanying drawing is only used to the purpose of illustration and description and is not intended to as restriction of the present invention.
Fig. 1 is the non-implantation of the present invention excites the apparatus embodiments one of blind visual impression logic chart through body surface, this equipment comprises main control module 11, input module 12, stimulating current generation module 1, output module 16 and display module 17, wherein, stimulating current generation module 1 comprises frequency generation unit 13, amplitude generation unit 14, power amplification unit 15.In addition, input module 12, frequency generation unit 13, amplitude generation unit 14 and display module 17 are connected with main control module 11 respectively, and alleged connection here can be electrical connection and/or mechanical connection.Further, power amplification unit 15 is connected with amplitude generation unit 14 and output module 16 respectively.It should be noted that at this, in figure, only show the corresponding frequency generation unit 13 of a stimulating current generation module 1 and this stimulating current generation module 1, an amplitude generation unit 14 and a power amplification unit 15, should understand, when the quantity of stimulating current generation module 1 is while being multiple, in the time producing many group stimulating currents, the quantity of frequency generation unit is correspondingly also multiple, that is to say in the time producing respectively by the many groups that the are formed by stacking stimulating current of low frequency pulse current and low frequency pulse current or low frequency pulse current and medium-frequency pulse electric current, the quantity of amplitude generation unit and power amplification unit is corresponding increase also.In the present invention, low frequency pulse current refers to the pulse current of medically alleged frequency lower than 1000Hz, medium-frequency pulse electric current refers to the pulse current of medically alleged frequency between 1KHz～100KHz, and low frequency pulse current and medium-frequency pulse electric current are all the little electric currents that can not work the mischief to human body.In this embodiment, input module 12 is for receiving the signalization of user input, and this signalization can be the signalization relevant with the frequency of electric current and/or amplitude; Display module 17 is for showing configuration information and the stimulating current information relevant with the frequency of electric current and/or amplitude; Frequency generation unit 13, under the control at main control module 11, produces the pulse signal of one group of medium and low frequency according to signalization; Amplitude generation unit 14 is under the control at main control module 11, the stimulating current signal of the corresponding amplitude of pulse signal genration of exporting according to signalization and corresponding frequencies generation unit, power amplification unit 15 is for carrying out power amplification to this stimulating current signal; Output module 16 comprises the non-implantation electrode of many groups, and this electrode output stimulating current signal also excites blind person to produce photoreception through body surface.In the application's various embodiment, (body surface not only comprises health body surface, skin) also comprise the cornea of eyeball, that is to say, can according to be with health body surface or and Corneal Contact, and select various applicable electrodes, and what this photoreception was concrete can be colourama and image vision impression, wherein, single group electrode has 2 tunnel outputs, and it is made up of plug, wire and electrode tip three parts.Preferably, on plug, separately having one can electric conductivity circular opening, makes another group electrode plug can insert this circular hole and realizes expansion.Electrode tip quantity can be 2,4,6 etc., makes the electrode of this equipment in use have good motility and extensibility.In addition, for the benefit of hand-held, partial electrode head is circle strip structure.In an exemplary embodiment, electrode tip is contacted with the body surface of circumference of eyes, thereby realize, the photoreception of vision the best is excited.Certainly, electrode tip can be contacted with the optional position of body surface, and all can realize the photoreception of vision is excited, the difference of the electrode tip contact of different body surface positions is to obtain different stimulation effect and experience.Further more optimizedly, corresponding two electrode tips of use, one of them electrode tip contacts with eyelid and another electrode tip contacts with hindbrain body surface, carries out photoreception thus excite between two electrode tips perpendicular to eyeball.Again further preferably, electrode is Corneal electrode, and this electrode directly contacts with cornea, thereby can more directly excite blind person's photoreception by cornea.At this, the active electrode directly contacting with cornea can be the applicable electrode of various types of corneal contact lens electrodes and other kinds.
In addition, it should be noted that, the stimulating current signal that this power amplification unit is exported is produced by pulse signal stack.In the non-implantation electrode of described many groups, respectively organize the stimulating current of non-implantation electrode output different frequency and/or different amplitudes.Can be thereby that low frequency pulse current and low frequency pulse current or low frequency pulse current and medium-frequency pulse electric current are superposeed and obtain stimulating current signal particularly, that is to say that one of feature of the present invention is not to be to produce single low frequency pulse current signal or single medium-frequency pulse current signal as stimulating current signal but using the pulsed current signal of stack as stimulating current signal, concrete additive process is not described in detail at this in addition, it can adopt method suitable in prior art, and, this equipment is as medical apparatus and instruments, output voltage meets medical electrical equipment code requirement, as preferred embodiment, output voltage is below 36V.In an one exemplary embodiment, stimulating current signal is the stack of the low frequency pulse current of frequency below 60Hz and other low frequency pulse current, understandable, and this other low frequency pulse current can be another or multiple low frequency pulse current.In another one exemplary embodiment, stimulating current is the low frequency pulse current of frequency below 60Hz and the stack of medium-frequency pulse electric current, same, and this other medium-frequency pulse electric current can be another or multiple medium-frequency pulse electric current.The quantity of the pulse current that need to superpose and choice for use low frequency or medium-frequency pulse electric current superpose can and stimulate required requirement change flexibly according to the individual specificity of the object that is stimulated.In addition, by selecting this characteristic frequency section (60Hz following) thus pulse current superpose to realize and blind person is carried out to optimum photoreception excite.In addition, in an exemplary embodiment, by frequency being carried out to dynamic change and according to the difference of the physiology resistance of particular individual, amplitude being regulated accordingly, thereby the diversification and the personalization that realize specific blind person excite, and that is to say that specific blind person has been realized to optimum photoreception to be excited.
In addition, user can be arranged and be exported discontinuously stimulating current by input module, and like this, one group of non-implantation electrode just can be exported the stimulating current of different frequency and/or different amplitudes interval certain hour.
Preferably, this non-implantation excites the equipment of blind visual impression also can comprise overcurrent protection module through body surface, and the stimulating current signal that this overcurrent protection module is exported power amplification unit carries out overcurrent protection.
The following describes this non-implantation excites a preferred embodiment of equipment of blind visual impression concrete structure through body surface:
In conjunction with Fig. 2, input module is selected the keyboard of 4*4, and the function of each button is as follows:
" 1 ": increase photoelectric functional intensity " 2 ": weaken photoelectric functional intensity
" 3 ": increase frequency " A ": reduce frequency
" 4 ": intermediate frequency adds " 5 ": 3 prescription cases add
" 6 ": 3 prescription cases subtract " 7 ": second channel intensity adds
" 8 ": subtract intensity " 9 ": 3 prescription cases are decided to be 3 seconds once
" B ": regularly " C ": 3 schemes 5 seconds once
" D ": pause function conversion gear " * ": intelligent function is automatic
In conjunction with Fig. 3, main control module is as the core devices of whole circuit, all information is all passed through this device processing, for example, can adopt atmel corp's model is the single-chip microcomputer U1 of AT89S52, this single-chip microcomputer U1 is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontrollers, has 8K at system programmable Flash memorizer.Use the manufacture of Atmel company high-density nonvolatile memory technology, completely compatible with the instruction of industrial 80C51 product and pin.On sheet, Flash allows program storage at system programmable, is also suitable for conventional programming device.On single-chip, have 8 dexterous bit CPUs and at system programmable Flash, make AT89S52 provide high flexible, super effective solution for numerous embedded Control application systems.Its main performance is as follows: with MCS-51 single-chip microcomputer product compatibility; 8K byte is at system programmable Flash memorizer; 1000 erase-write cycles; Full static state operation: 0Hz～33Hz; Three grades of encipheror memorizeies; 32 programmable I/O mouth lines; Three 16 bit timing device/enumerators; Eight interrupt sources; Full duplex UART serial-port; Low-power consumption free time and power-down mode; After power down, interrupt waking up; WatchDog Timer; Double Data pointer; Power down identifier.And in this single-chip microcomputer U1, P1.0-P1.7 is external connection keyboard interface, the function such as frequency and output amplitude respectively can control system producing; INT0 (P32), INT1 (P33), TXD (P31) and RXD(P30) be four pulse output ends, it,, by by Keyboard Control, can make single-chip microcomputer U1 export required intermediate frequency first-harmonic shape and the waveform of frequency of modulated wave; 31 feet connect high level and represent to use internal program memory; The external 12MHZ crystal oscillator of 18 and 19 pin, is the single-chip microcomputer U1 work generation cycle clock that is 1US, and two capacitor C 2 and C3 play fine setting effect to crystal oscillator frequency.In addition, doctor can be according to storing multiple specific series of programs schemes in patient's patient's condition selector.
Display module is selected Dot-matrix Graphic LCD, and for example, adopting model is that TG12864 display (not shown) shows relevant information.In conjunction with Fig. 1, J1 is resistor chain, and resistance is 10 kilo-ohms, and it provides pull-up resistor for single-chip microcomputer P00-P07 mouth.Model is that the display of TG12864 is that one has 4/8 parallel-by-bits, 2 lines or 3 line serial multiple interfaces modes, the Dot-matrix Graphic LCD that GB one-level, secondary simplified form of Chinese Character character library are contained in inside, its display resolution is 128 × 64, built-in 8192 16*16 point Chinese characters and 128 16*8 point ascii character-sets.Utilize this display interface mode and operational order simply and easily flexibly, can form complete Chinese man-machine interaction graphical interfaces.Can show the Chinese character of 8 × 4 row 16 × 16 dot matrix, also can complete figure and show.In addition, Low-voltage Low-power is its another distinguishing feature.Its fundamental characteristics is as follows: low supply voltage (VDD:+3.0--+5.5V); Display resolution: 128 × 64 points; Built-in Hanzi font library, provides 8192 16 × 16 dot matrix Chinese characters (simplified and traditional body is optional); Built-in 128 16 × 8 dot characters; 2MHZ clock frequency; Display mode: STN, semi-transparent, just aobvious; Type of drive: 1/32DUTY, 1/5BIAS; View directions: 6 points; Mode backlight: the highlighted White LED of sidepiece, power consumption is only 1/5-1/10 of common LED; Communication modes: serial, parallel port are optional; Built-in DC-DC change-over circuit, without additional negative pressure; Without chip selection signal, simplify software design; Operating temperature: 0 ℃-+55 ℃; Storing temperature :-20 ℃-+60 ℃.
Frequency generation unit comprises that two frequencies produce subelement, and each frequency produces subelement can produce intermediate frequency or low frequency signal.Illustrate that below in conjunction with Fig. 4 one of them frequency produces the circuit structure of subelement, produce in subelement in this frequency, the first end of the first resistance R 8 connects the pulse output end (PULSEI1) of single-chip microcomputer U1, the second end of the first resistance R 8 connects the base stage of the first audion BG1, the grounded emitter of the first audion BG1, the colelctor electrode of the first audion BG1 connects 9V voltage by the second resistance R 9, and the current collection of the first audion BG1 is the outfan of this frequency generation unit (PULSE1) very.The circuit structure that should be understood that another frequency generation subelement is identical with it, and its outfan is PULSE2.
In conjunction with Fig. 5 and Fig. 6, in amplitude generation unit, it is the DA transducer U2 of 8 current potential outputs of 4 passage of TLC5620 that DA transducer is selected model, it is the analog switch module of CD4066 that analog switch is selected model, this analog switch module comprises 4 independently analog switches, and two analog switch U5A, U5B are only shown in figure.The reference edge (REFA) of DA transducer U2 connects the adjustable end of rheostat W3, and the another two ends of rheostat W3 connect respectively high voltage and ground, are used to DA transducer that reference voltage is provided, thereby reach the object of span of control limit of control.The digital quantity serial line interface (DATA) of DA transducer U2, clock interface (CLK) and serial Loading Control port (LOAD) meet respectively the corresponding output end (P22 of single-chip microcomputer, P21, P20), the in-phase input end of the output termination amplifier U4A of DA transducer U2, its outfan of anti-phase input termination of amplifier U4A, the outfan of amplifier U4A also connects the input of the first analog switch U5A, the outfan of the first analog switch U5A connects the input of the second analog switch U5B, the control end of the control end of the first analog switch U5A and the second analog switch U5B meets respectively the outfan (PULSE1 of two frequency generation units, PULSE2), the outfan of the second analog switch U5B is the outfan (OUT1) of this amplitude generation unit.In addition, resistance R 3 is connected between the outfan and ground of the first analog switch U5A, and resistance R 4 is between the outfan and ground of the second analog switch U5B, and in other embodiments, resistance R 3, R4 can save.
In conjunction with Fig. 7, in power amplification unit, the inverting input of the second amplifier U4C is by the 4th resistance R 10 ground connection, the in-phase input end of the second amplifier U4C connects the outfan (OUT1) of the second analog switch U5B by the 5th resistance R 17, the outfan of the second amplifier U4C connects its inverting input by the 3rd resistance R 18, the base stage of the second audion BG5 connects the outfan of the second amplifier U4C, the colelctor electrode of the second audion BG5 connects 9V voltage, the transmitting of the second audion BG5 is the outfan of this power amplification unit very, and by interface, J31 connects multi-group electrode.In addition, in overcurrent protection module, the negative pole of the first diode D1 connects the colelctor electrode utmost point of the second audion BG5, and the negative pole of the positive pole of the first diode D1 and the second diode D2 connects the emitter stage of the first audion BG5, the plus earth of the second diode D2 in the lump.
In addition, non-implantation of the present invention excites the equipment of blind visual impression also to comprise through body surface: organize color lamp group, color light control module and driver module, wherein, color light control module is for receiving the pattern signalization of color lamp group more; Driver module is for carrying out luminous according to color lamp group described in the control of pattern signalization, one group of color lamp group produces a kind of monochromatic light and excites for blind person being carried out to a kind of monochromatic light vision, that is to say, blind person is made to further vision and excite, this monochromatic light can be for example HONGGUANG, gold-tinted, blue light etc. and can change flexibly according to actual needs.Understandable, this monochromatic light can be to obtain by red green blue tricolor mixing preparation.
Suppose that color lamp group shares four groups, in conjunction with Fig. 8, in driver module, it is the shift register U3 of MC14015 that shift register is selected model, clock circuit is made up of 555 intervalometer U4 and periphery components and parts, for shift register, U3 provides clock signal, and rheostat W1 is for controlling the interval of color lamp light on and off.Four driving audion Q1, Q2, Q3, the base stage of Q4 is respectively by current-limiting resistance R22, R23, R24, R25 connects four outfan (Q1A of shift register U3, Q2A, Q3A, Q4A), four driving audion Q1, Q2, Q3, the grounded emitter of Q4, four driving audion Q1, Q2, Q3, Q4 colelctor electrode respectively by current-limiting resistance R26, R27, R28, R29 connects bidirectional triode thyristor Q6, Q7, Q8, the control utmost point of Q9, bidirectional triode thyristor Q6, Q7, Q8, the two ends of Q9 connect respectively positive pole and the negative pole of corresponding color lamp group (not shown) by interface J2.
In conjunction with Fig. 8, color light control module comprises band switch and for make the selection circuit of corresponding bidirectional triode thyristor conducting according to the setting of band switch, wherein, band switch is connected and is selected circuit by interface J3, select circuit to comprise diode D3-D8, audion Q5 and resistance R 11, wherein, diode D3, D4, D5, the positive pole of D6 connects respectively four outfans of shift register U3, the positive pole of the negative pole of diode D3 and diode D7 connects the first contact of band switch in the lump by interface J3, the positive pole of the negative pole of diode D4 and diode D9 connects the second contact of band switch in the lump by interface J3, the positive pole of the negative pole of diode D5 and diode D8 connects the 3rd contact of band switch in the lump by interface J3, the negative pole of diode D6 connects the 4th contact of band switch by interface J3, diode D7, D9, the negative pole of D8 connects the 5th contact of band switch in the lump by interface J3, the base stage of audion Q5 connects the 6th contact of band switch by resistance R 20 and interface J3, the grounded emitter of audion Q5, the colelctor electrode of audion Q5 connects high voltage by resistance R 21, the colelctor electrode of audion Q5 also connects the data input pin of shift register U3.
In an exemplary embodiment, non-implantation of the present invention excites the equipment of blind visual impression also to comprise intense light source through body surface, and intense light source produces high light and excites for blind person is carried out to high light, that is to say, blind person is made to further vision and excite.In the application's various embodiment, intense light source refers to that colour temperature is more than 6000K, and brightness can be up to 32000LM(lumen) light source (for example, white light source), and this intense light source can be for example xenon lamp or Halogen light, preferably uses in addition xenon lamp.
Need explanation at this, when using intense light source, blind person is carried out to high light while exciting, different from available technology adopting passage of scintillation light and pictorial stimulus, the application's embodiment will use high color temperature and high brightness and lasting stimulation mode but not flashing mode, excite thereby can obtain more excellent vision.
In an exemplary embodiment, excite the operation principle of the equipment of blind visual impression to describe this non-implantation through body surface: first user arranges frequency and amplitude by the button of input module, this configuration information is being sent to after single-chip microcomputer U1, single-chip microcomputer U1 exports corresponding pulse signal, corresponding frequency generation unit is according to this output of pulse signal intermediate frequency or low frequency signal, and sends into the control end of the first analog switch U5A, the second analog switch U5B.Simultaneously, single-chip microcomputer U1 control DA transducer U2 exports the analogue signal of corresponding amplitude, this analogue signal is after the first analog switch U5A, U5B, become the stimulating current signal with certain frequency and certain amplitude, this stimulating current signal is after amplifier U4C and audion BG5 amplification, and by interface, J31 exports electrode to.In the time that electrode is positioned over body surface (not only at eye and head, and in health plurality of positions such as hands, foot, breast, the back of the body, abdomen, necks), stimulating current conducts to visual system, to activate not yet thoroughly downright bad visual cell, recovers and regeneration visual performance.Therefore, this by the mode of electrode contact body surface, can produce the visual experience of colourama and image, evidence, 5 grades of blind persons of part still can activate remaining visual cell in this way.By stimulating, blind person can feel by as finds the visual space tests such as doorway, positioning object and 1-3 rice identification index from unglazed; Train through further repeatedly stimulating, vision all obtains effective rising, and the best can be promoted to 0.5 above vision, and this vision comprises the full details of the vision of regenerating, and as color, the degree of depth, quality structure, has stereopsis and the meticulous ability of looking.For there being vision crowd to detect, electrode selects eye to comprise in addition the plurality of positions of body limbs and metastomium, adopt binocular closure state, change different with parameter of body surface position that visual information is placed with electrode, color adularescent, blueness, yellow, redness, green and secondary colour, shape has point-like, column, the multiple figure such as netted, and the brightness of visual experience is enough, also can perception under the state of opening eyes.
In addition, user can select different color lamp group work by band switch, be specially: control work and the cut-off of audion Q5 by the various combination of its first to five contact, the colelctor electrode of audion Q5 is received the data input pin of shift register U3, thereby make four of the outfan outputs of shift register U3 drive signal, these four drive signal respectively by driving the work of four bidirectional triode thyristors of audion control, make color lamp group according to different frequency brightness work by the diode D3-D9 of one-way conduction simultaneously, for example flicker is beated, vision is made and further excited to train vision.
In addition,, by intense light source, generation high light is made further vision to blind person and is excited further to train vision.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. non-implantation excites an equipment for blind visual impression through body surface, it is characterized in that, comprising:
Main control module;
Input module, it is connected in described main control module, and for receiving user's signalization relevant with frequency electric current and/or amplitude input;
At least one stimulating current generation module, it is connected in described main control module, and under the control of described main control module, produce at least one group of stimulating current according to described signalization, described stimulating current is the stack of low frequency pulse current and low frequency pulse current or low frequency pulse current and medium-frequency pulse electric current;
Output module, it is connected in described at least one stimulating current generation module, and described output module comprises the non-implantation electrode of many groups, and described electrode contacts with body surface, and described stimulating current excites blind person to produce photoreception from described electrode output through body surface.
2. non-implantation according to claim 1 excites the equipment of blind visual impression through body surface, it is characterized in that, described stimulating current is the stack of the low frequency pulse current of frequency below 60Hz and other low frequency pulse current; Or,
Described stimulating current is the low frequency pulse current of frequency below 60Hz and the stack of medium-frequency pulse electric current.
3. non-implantation according to claim 1 excites the equipment of blind visual impression through body surface, it is characterized in that, one group of non-implantation electrode comprises two electrodes that contact with the body surface of circumference of eyes respectively.
4. non-implantation according to claim 1 excites the equipment of blind visual impression through body surface, it is characterized in that, one group of non-implantation electrode comprises an electrode contacting with eyelid and an electrode contacting with hindbrain body surface.
5. non-implantation according to claim 1 excites the equipment of blind visual impression through body surface, it is characterized in that, described electrode is Corneal electrode, to excite blind person to produce photoreception by cornea.
6. non-implantation according to claim 1 excites the equipment of blind visual impression through body surface, it is characterized in that, in the non-implantation electrode of described many groups, respectively organizes the stimulating current of non-implantation electrode output different frequency and/or different amplitudes.
7. non-implantation according to claim 1 excites the equipment of blind visual impression through body surface, it is characterized in that the stimulating current of one group of non-implantation electrode gap certain hour ground output different frequency and/or different amplitudes.
8. the equipment that arbitrary described non-implantation excites blind visual to experience through body surface according to claim 1-7, it is characterized in that, described equipment also comprises many group color lamp groups, and every group of color lamp group produces a kind of monochromatic light and excite for blind person being carried out to a kind of monochromatic light vision.
9. the equipment that arbitrary described non-implantation excites blind visual to experience through body surface according to claim 1-7, is characterized in that, described equipment also comprises intense light source, and described intense light source produces high light and excites for blind person is carried out to daylight vision.
10. the equipment that arbitrary described non-implantation excites blind visual to experience through body surface according to claim 1-7, it is characterized in that, described equipment also comprises display module, it is connected in described main control module, and for showing configuration information and the stimulating current information relevant with the frequency of electric current and/or amplitude.
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