CN101564334A - Artificial cochlear device - Google Patents
Artificial cochlear device Download PDFInfo
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- CN101564334A CN101564334A CNA2008100432762A CN200810043276A CN101564334A CN 101564334 A CN101564334 A CN 101564334A CN A2008100432762 A CNA2008100432762 A CN A2008100432762A CN 200810043276 A CN200810043276 A CN 200810043276A CN 101564334 A CN101564334 A CN 101564334A
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- 230000000638 stimulation Effects 0.000 claims abstract description 23
- 210000003477 cochlea Anatomy 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 16
- 230000007794 irritation Effects 0.000 claims description 16
- 238000004088 simulation Methods 0.000 claims description 13
- 210000003128 head Anatomy 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 210000000860 cochlear nerve Anatomy 0.000 abstract description 6
- 230000005236 sound signal Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 206010011878 Deafness Diseases 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000036039 immunity Effects 0.000 description 3
- 239000007943 implant Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000007920 subcutaneous administration Methods 0.000 description 3
- 239000000560 biocompatible material Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000566 Platinum-iridium alloy Inorganic materials 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical class [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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Abstract
The invention discloses an artificial cochlear device, comprising an external circuit and an internal circuit. The external circuit comprises a first microphone, an audio frequency amplifier, an external energy emitting circuit and an external coil; the internal circuit comprises a second microphone, an electric stimulation generating device, a channel selecting switch, an internal coil, a rectification circuit and an electrode array. The first microphone converts the collected voice into an audio frequency analog electric signal; the audio frequency amplifier amplifies the audio frequency analog electric signal to output voice; after the second microphone collects the amplified voice, the output audio frequency analog electric signal is transmitted to the electric stimulation generating device; the electric stimulation generating device converts the received audio frequency analog electric signal into impulse stimulation; and the impulse stimulation is transmitted to the electrode array through the channel selecting switch. During use, the electrode array of the internal circuit is arranged at the cochlear nerve, other parts are implanted under the skin of the head, and the external circuit is fixed close to the external skin. The device has strong anti-interference performance and low cost.
Description
Technical field
The present invention relates to medical apparatus and instruments, particularly a kind of artificial cochlea device.
Background technology
Since the sixties in 20th century, people have just begun artificial cochlea's research.In the eighties, multi-channel artificial cochlea becomes the main flow of artificial cochlea's technology gradually, enter the nineties after, the artificial cochlea has extensively adopted multi-channel system.At present, Australia Cochlear company, U.S. Advanced Bionics company and Austrian MED-EL company are three main suppliers of artificial cochlea's product, and present artificial cochlea's product of this three company is the acoustical signal by the digitizing technique handler mainly.
Artificial cochlea's operation principle is to utilize the acoustic-electric transducer mount to replace the sensory cell of loss of function in deaf person's cochlea, directly stimulates auditory nerve to make the deaf person produce audition by electrode.Chinese patent CN200510012002.3 discloses a kind of two-way multi-channel artificial cochlea system that has on-chip processor, the extracorporeal circuit that comprises mutual wireless coupling, body internal circuit and the electrode group that links to each other with the body internal circuit, described extracorporeal circuit comprises sound collection unit, automatic gain control unit, computer interface unit, manipulator, comparator and external antenna, the body internal circuit comprises internal antenna, rectification filtering unit, clock generating unit, demodulator, analog-digital converter, digital signal processor, the reverse data output unit, digital to analog converter, voltage-controlled current source group and switch matrix, the body internal resistance is that above-mentioned each circuit unit is integrated in characteristic size is that the area that customizes under the technology of 0.18um is on the special chip of 4mm * 4mm, described electrode group links to each other with switch matrix in the body, and the output current on the switch matrix respective channel is connected to stimulates acoustic nerve on the acoustic nerve.This patent is modulated the audio signal that collects after external antenna sends to the body internal circuit through manipulator, the body internal circuit receives this modulated audio frequency model through internal antenna, and this audio signal other circuit in body finally stimulates auditory nerve to make the deaf person produce audition by the electrode group after demodulator carries out demodulation then.Because audio signal must be carried out modulation through manipulator, demodulator, this has increased circuit complexity, and cost is higher, and is interfered easily and causes the audio signal distortion.
Summary of the invention
The technical problem that the present invention solves provides a kind of artificial cochlea device, and its strong interference immunity and cost are low.
For solving the problems of the technologies described above, artificial cochlea device of the present invention, comprise extracorporeal circuit, body internal circuit, described extracorporeal circuit comprises first mike, audio frequency amplifier, external energy radiating circuit, external coil, and described body internal circuit comprises second mike, electricity irritation generator, channel selector switch, body interior loop, rectification circuit, electrod-array; First mike is converted into the audio frequency simulation signal of telecommunication with the sound of gathering, this audio frequency simulation signal of telecommunication amplifies the back output sound through audio frequency amplifier, second mike is gathered the sound after this amplification, the audio frequency simulation signal of telecommunication of output is transferred into the electricity irritation generator, the electricity irritation generator is converted into impulse stimulation with the audio frequency simulation signal of telecommunication that receives, and this impulse stimulation sends to electrod-array by channel selector switch; The electrod-array of body internal circuit is distributed in the nervus cochleae place during use, and other parts are implanted under the skin of head, and extracorporeal circuit is pressed close to this place's skin external stability.
External energy radiating circuit can be converted into AC energy with dc energy, launch high-power carrier energy signal by external coil, the body interior loop receives the high-power carrier energy signal that external energy radiating circuit is launched by electromagnetic coupled, and the AC energy that rectification circuit receives the body interior loop is converted into dc energy body internal circuit and uses.
Can be used as the clock reference of body internal circuit simultaneously by the high-power carrier energy signal of external coil emission.
Artificial cochlea device of the present invention, second mike of body internal circuit is near extracorporeal circuit, the external first mike collection and through voice emplifying, subcutaneous second mike can receive enough strong sound, directly the output audio analog electrical signal is exported impulse stimulation to the control of electricity irritation generator then, because of audio signal need not be passed through manipulator, demodulator carries out modulation, reduced circuit complexity, the low and strong interference immunity of cost.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 is artificial cochlea device one an embodiment block diagram of the present invention;
The fixture schematic diagram that Fig. 2 is made up of passive armature in external cylindrical magnet ferrum and the body.
The specific embodiment
Artificial cochlea device one embodiment of the present invention is made up of two parts circuit in the external body as shown in Figure 1.
Extracorporeal circuit comprises first mike, audio frequency amplifier, manual adjustments audio unit, external energy radiating circuit, external coil, zinc-air battery, two cylindrical magnet ferrum, wherein,
First mike: be used for collected sound signal, the acoustical signal that collects delivered to audio frequency amplifier amplify.The bandwidth range that mike receives acoustical signal is 300-6000Hz.
Audio frequency amplifier: this circuit amplifies output sound with the audio frequency simulation signal of telecommunication of gathering.
External energy radiating circuit: can high efficiency dc energy be converted into AC energy, launch high-power carrier energy signal by external coil, for the circuit that implants provides the operate as normal energy needed, the energy carrier wave can be used as the required clock reference of body internal circuit simultaneously.The radio-frequency (RF) energy emission is undertaken by the electromagnetic coupled mode.The frequency range of high-power carrier wave is 1-10MHz, though higher carrier frequency can increase the receiving efficiency of body interior loop, but can produce more obvious Kelvin effect (skin effect), cause external coil equivalent series resistance (Equivalent SerialResistor, ESR) increase, and then cause the increase of the power amplifier self-energy loss of external energy radiating circuit, thereby reduce the efficient of the output of external coil.
External coil: the material of making external coil satisfies the cost requirement of product, electromagnetic performance requires and biocompatibility requirement.If the use single cord will reduce Kelvin effect, but increased cost simultaneously, and the mechanical strength of single cord is lower, therefore uses multi cord to make external coil.
Zinc-air battery: provide the extracorporeal circuit operate as normal needed electric energy, it is convenient and with low cost to change.
Manual adjustments audio unit: can regulate the size of the sound of audio frequency amplifier output, reach the satisfied intensity of sound of user.This device and intravital user sound intensity adjusting device are used, and can make user obtain the sound receptive field of the most comfortable.
Two cylindrical magnet ferrum: as shown in Figure 2, this cylinder-shaped magnet can form the magnetic field of closed loop with the passive magnetic armature that implants, thereby use littler lighter Magnet that bigger the suction-combining force just is provided, and the suction-combining force is evenly distributed, guaranteed the locus coupling of part in outer body and the body, prevented because factors such as motion cause the transfer voice effect that the second microphone position mismatch causes in external audio frequency amplifier and the body.The accuracy that has fixedly guaranteed the volume adjusting of extracorporeal circuit consubstantiality internal circuit relative position.
The body internal circuit comprises second mike, electricity irritation generator, user intensity of sound adjusting device, channel selector switch, electrod-array, body interior loop, full-wave rectifying circuit, passive magnetic armature.
Second mike: collect acoustical signal once more, and audio electrical signal is sent to user intensity of sound adjusting device and electricity irritation generator with analog form.
The electricity irritation generator: the audio signal that the electricity irritation generator is exported second mike that receives is carried out the acoustical signal mapping, produces impulse stimulation, can realize automatic gain control.The electricity irritation generator is regulated stimulus intensity by automatic gain control circuit, and the audio signal that second mike that receives is exported is mapped as symmetric double to impulse stimulation, the mode that this stimulation has adopted constant voltage to stimulate; The timesharing of successive constant voltage stimulus signal is selected by multichannel, thereby produces nonoverlapping stimulation that interweaves, and further this stimulation is sent to electrode by electrode cable.
The electricity irritation generator can be realized automatic gain control, acoustical signal mapping and stimulate producing function.Because adopt the mode of analogue transmission, body internal circuit of the present invention need not to use DSP (digital signal processor) chip, this mode does not use dsp chip to simplify the volume of body internal circuit, and has reduced the overall power of body internal circuit; And the mode of analogue transmission can keep all raw informations of acoustical signal, and higher anti-interference is arranged.
User intensity of sound adjusting device: at the individual variation to electric stimulating time and intensity of user, adjust the time and intensity of impulse stimulation, through after otology expert user intensity of sound adjusting device is adjusted, can make each user reach satisfied effect.This device can be imported a spot of special intonation pattern or infrasonic wave and ultrasound wave order by external mike and regulate stimulus waveform, calculates instantaneous stimulation amplitude, produces impulse stimulation, the ON time of control multidiameter option switch.When receiving particular sound signal, be mapped as corresponding stimulus modelity.
Channel selector switch: channel selector switch timesharing conducting, to select different electrode in the electrod-array, the nervus cochleae diverse location is carried out electricity irritation.
Electrod-array: adopt eight channel electrodes, the platinum-iridium alloy lead links together electrical stimulation device and eight channel electrodes, to such an extent as to this electrode employing should have enough big surface area and be unlikely to excessive damage acoustic nerve with the surface charge density of guaranteeing electrode, to have simultaneously to have lower impedance to reduce influence to stimulation voltage.
The body interior loop: cost requirement, electromagnetic performance that the material of making coil satisfies product require and biocompatibility requirement, and the body interior loop receives the high-power carrier energy signal of external energy radiating circuit by external coil emission by electromagnetic coupled.
Full-wave rectifying circuit: the AC energy that the body interior loop is received is converted into dc energy and uses for artificial cochlea device body internal circuit.
Passive magnetic armature: form closed loop magnetic field with external cylinder-shaped magnet, guaranteed extracorporeal circuit and body internal circuit relative position accurately.Use passive magnetic armature and do not use natural permanent magnet material, can expand the scope of our select magnet material, thereby avoid selecting expensive permanent magnet material, can further save cost.
Artificial cochlea device of the present invention, the electrod-array of body internal circuit is distributed in the nervus cochleae place when installing and using, other parts are implanted under the skin of head, and extracorporeal circuit is pressed close to this place's skin external stability, and the voice output position of audio frequency amplifier is corresponding with second mike.The sound collection unit of extracorporeal circuit-first mike at first is converted into sound the audio frequency simulation signal of telecommunication, the audio frequency simulation signal of telecommunication amplifies the back output sound through audio frequency amplifier, because the second subcutaneous mike is near the outer audio frequency amplifier of skin, subcutaneous second mike can receive enough strong sound, and the audio frequency simulation signal of telecommunication of second mike output is transferred into the electricity irritation generator.The electromagnetic coupled of external energy radiating circuit by external coil and body interior loop with power transfer to the body internal circuit.The energy that the body interior loop receives obtains the required energy of body internal circuit operate as normal after at first delivering to full-wave rectifying circuit, the energy carrier wave can be used as the required clock reference of body internal circuit simultaneously, meanwhile, intravital electricity irritation generator will receive the audio frequency simulation signal of telecommunication and be converted into symmetrical two-phase impulse stimulation, and this stimulates by the different contact points of multidiameter option switch timesharing stimulation implant electrode with nervus cochleae.The body internal circuit all is encapsulated in except that electrode in the box, box uses biocompatible materials to wrap up, use noble gas to be full of space between body internal circuit and the encapsulant simultaneously, guarantee the isolation fully of body internal circuit and internal milieu, prevent that vapor permeation from entering implantation circuit, sealing can be guaranteed the long-term operate as normal of body internal circuit through biocompatible materials.The inside and outside device is fixed by armature and Magnet, has guaranteed the accurate relative position of inside and outside device.
The artificial cochlea implanting device of the present invention adopts the analoging sound signal transmission means, strong interference immunity, and circuit structure is simple, and power consumption reduces.Under the current techniques condition, the volume of chips such as the variable connector chip of each big semiconductor company exploitation and amplifier chip is miniaturization all, can be adapted to the requirement that body is implanted into fully.
Claims (6)
1, a kind of artificial cochlea device, comprise extracorporeal circuit, body internal circuit, it is characterized in that, described extracorporeal circuit comprises first mike, audio frequency amplifier, external energy radiating circuit, external coil, and described body internal circuit comprises second mike, electricity irritation generator, channel selector switch, body interior loop, rectification circuit, electrod-array; First mike is converted into the audio frequency simulation signal of telecommunication with the sound of gathering, this audio frequency simulation signal of telecommunication amplifies the back output sound through audio frequency amplifier, second mike is gathered the sound after this amplification, the audio frequency simulation signal of telecommunication of output is transferred into the electricity irritation generator, the electricity irritation generator is converted into impulse stimulation with the audio frequency simulation signal of telecommunication that receives, and this impulse stimulation sends to electrod-array by channel selector switch; The electrod-array of body internal circuit is distributed in the nervus cochleae place during use, and other parts are implanted under the skin of head, and extracorporeal circuit is pressed close to this place's skin external stability.
2, artificial cochlea device according to claim 1, it is characterized in that, external energy radiating circuit is converted into AC energy with dc energy, launch high-power carrier energy signal by external coil, the body interior loop receives the high-power carrier energy signal that external energy radiating circuit is launched by electromagnetic coupled, and the AC energy that rectification circuit receives the body interior loop is converted into dc energy donor internal circuit and uses.
3, artificial cochlea device according to claim 2 is characterized in that, external energy radiating circuit is converted into AC energy with dc energy, and the high-power carrier energy signal by the emission of external coil is simultaneously as the clock reference of body internal circuit.
4, artificial cochlea device according to claim 1 is characterized in that, extracorporeal circuit also comprises permanent magnet, and the body internal circuit comprises passive magnetic armature, passive magnetic armature and external permanent magnet composition closed loop magnetic field in the body.
5, artificial cochlea device according to claim 1 is characterized in that, extracorporeal circuit also comprises the manual adjustments audio unit, is used to regulate the sound size of audio frequency amplifier output.
6, artificial cochlea device according to claim 1 is characterized in that, the body internal circuit also comprises user intensity of sound adjusting device, is used to adjust the time and intensity of impulse stimulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100432762A CN101564334A (en) | 2008-04-22 | 2008-04-22 | Artificial cochlear device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100432762A CN101564334A (en) | 2008-04-22 | 2008-04-22 | Artificial cochlear device |
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| CN101564334A true CN101564334A (en) | 2009-10-28 |
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| CNA2008100432762A Pending CN101564334A (en) | 2008-04-22 | 2008-04-22 | Artificial cochlear device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103815988A (en) * | 2014-03-18 | 2014-05-28 | 中国科学院声学研究所 | Artificial cochlea device |
| CN105596119A (en) * | 2016-01-27 | 2016-05-25 | 山东大学 | Primary-secondary cochlea electrode arrangement, device, system and method for enhancing musical melody perception |
| CN109069297A (en) * | 2015-11-23 | 2018-12-21 | 通用医疗公司 | System and method for the percutaneous vagal stimulation of auricle formula |
| CN110755741A (en) * | 2019-10-18 | 2020-02-07 | 上海力声特医学科技有限公司 | Artificial cochlea |
| CN110974482A (en) * | 2019-11-22 | 2020-04-10 | 北京泌康医疗科技有限公司 | Urinary incontinence automatic control system with wireless transmission function and internal machine thereof |
| CN114451895A (en) * | 2022-02-07 | 2022-05-10 | 许开云 | An intelligent monitoring system for bladder safety pressure |
-
2008
- 2008-04-22 CN CNA2008100432762A patent/CN101564334A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103815988A (en) * | 2014-03-18 | 2014-05-28 | 中国科学院声学研究所 | Artificial cochlea device |
| CN103815988B (en) * | 2014-03-18 | 2016-08-31 | 中国科学院声学研究所 | Artificial cochlea device |
| CN109069297A (en) * | 2015-11-23 | 2018-12-21 | 通用医疗公司 | System and method for the percutaneous vagal stimulation of auricle formula |
| US11027116B2 (en) | 2015-11-23 | 2021-06-08 | The General Hospital Corporation | System and method for ear-arranged transcutaneous vagus nerve stimulation |
| CN105596119A (en) * | 2016-01-27 | 2016-05-25 | 山东大学 | Primary-secondary cochlea electrode arrangement, device, system and method for enhancing musical melody perception |
| CN110755741A (en) * | 2019-10-18 | 2020-02-07 | 上海力声特医学科技有限公司 | Artificial cochlea |
| CN110974482A (en) * | 2019-11-22 | 2020-04-10 | 北京泌康医疗科技有限公司 | Urinary incontinence automatic control system with wireless transmission function and internal machine thereof |
| CN114451895A (en) * | 2022-02-07 | 2022-05-10 | 许开云 | An intelligent monitoring system for bladder safety pressure |
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Open date: 20091028 |