CN102623002B - Bionic device for simulating vocal-cord vibration - Google Patents
Bionic device for simulating vocal-cord vibration Download PDFInfo
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- CN102623002B CN102623002B CN 201210036608 CN201210036608A CN102623002B CN 102623002 B CN102623002 B CN 102623002B CN 201210036608 CN201210036608 CN 201210036608 CN 201210036608 A CN201210036608 A CN 201210036608A CN 102623002 B CN102623002 B CN 102623002B
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- piezoelectric ceramic
- composite piezoelectric
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Abstract
The invention discloses a bionic device for simulating vocal-cord vibration. The outer ends of pairwise opposite composite piezoelectric ceramic plates are fixedly connected onto projections of rubber rings clinging to the inner wall of a simulation box respectively, and the inner ends of the opposite composite piezoelectric ceramic plates are fixedly connected with metal pull tubes vertically penetrating through side holes on the same side of the simulation box through insulation elastic materials at the center of the simulation box. Sound production of a vocal cord of a human in different states can be simulated by the aid of the bionic device, vibration of the vocal cord opening at different angles and vibration of the vocal cord in pathology can be simulated by means of adjusting the metal pull tubes, high pitch and low pitch are simulated by means of adjusting the strength of excitation signals, and multilevel simulation of a vocal cord structure is realized. The bionic device is simple in structure and convenient in operation.
Description
Technical field
The present invention relates to a kind of simulation vocal cord vibration bionic device, be specifically related to a kind of utilization acoustic transducer and simulate the vocal cords vibration-sound generating device.
Background technology
Vocal cords are core organ and physiological foundations of sonification system.Research to sound generating mechanism contributes to the pathologic, physiologic feature that discloses the vocal cord vibration characteristic and understand vocal cord vibration.The thinking of research vocal cord vibration mainly contains two at present: the one, and use mass spring oscillator to simulate vocal cords, set up the spring of vocal cord vibration---the mass model.The single mass model that single degree of freedom vibration is specifically arranged, two mass models of double freedom, and four mass models.These model realizations the vibration of vocal cords structures, but vocal cords physiological structure has been forgiven mucous layer, tough belt and muscle layer.Do not embody the hierarchical nature of vocal cords in said structure, be difficult to be associated with actual vocal cords physiological property.Had afterwards the people that finite element method is introduced to the vocal cords model, but the calculated amount religion is large.Then use the FFM method to determine the parameter of mass and the spring of two mass models, then calculate glottis and involve the simulation vocal cord vibration, but this model is not considered the characteristic of pathologic vocal cord vibration.
Another thinking of research vocal cord vibration is to regard vocal cords as elastic continuum, the Hooke's law of utilization broad sense defines stress---the strain stress relation of vocal cords tissue, and the mechanical characteristic of vocal cords tissue uses the elasticity coefficient such as Young modulus, shear amount, Poisson's coefficient to describe.This model can be studied the vocal cord vibration characteristic that a lot of discrete thinkings can not be studied, and such as surface wave, shear wave, based on this, selects close artificial material (such as silica gel) to form physical model and simulates vocal cord vibration.In order to study vocal cord vibration characteristic and sound generating mechanism, such as the mode of oscillation of vocal cords, the generation of vocal nodule, the mechanism of irregular pathology sounding birth etc.Yet a large amount of physiology analytics analysis and physiological Study have disclosed fully in the vocal cords tissue and have had complicated composite structure.Can say band is not that simple solid, liquid, the interaction reached have between the two determined that the characteristic of this compound substance reaches the dynamics of the vocal cords tissue vibration consisted of it jointly.That is to say, the vocal cords theory of single states of matter can not well disclose vibration and the sounding characteristic of vocal cords.
Summary of the invention
The purpose of this invention is to provide a kind of simulation vocal cord vibration bionic device, acoustic transducer is incorporated into to this field and describes the vocal cords tissue, with materials such as composite piezoelectric ceramic sheet, silica gel and rubber, simulate vocal cord vibration.
Implementation procedure of the present invention is as follows:
A kind of simulation vocal cord vibration bionic device, it is characterized in that: the outer end of the composite piezoelectric ceramic sheet (2) of positioned opposite is solidly connected respectively in the projection (1) of being close to the rubber ring (5) of simulating box (12) inwall above in twos, and the inner metal trombone (9) of with passing of vertical direction, simulating box (12) homonymy side opening (15) of the composite piezoelectric ceramic sheet (2) of positioned opposite is solidly connected with the center of resilient material (10) at simulation box (12) of insulating.Inside and outside firm silicone rubber, the firm silicone rubber A(16 of filling of rubber ring (5)) elastic hardness is greater than firm silicone rubber B(11) so that firm silicone rubber B(11) deformation quantity be greater than firm silicone rubber A(16).
There are screw thread (7) and nut (8) in the outer end of metal trombone (9), is used for regulating the flexible length of metal trombone (9).
Simulation box (12) upper and lower surface is provided with equally distributed scale (6), is convenient to regulate the angle that composite piezoelectric ceramic sheet (2) stretches.
The composite piezoelectric ceramic sheet by insulation stickum (4) by two identical ceramic crystal sheets (3) formation that is bonded together.The inner of composite piezoelectric ceramic sheet (2) is fixedly connected with by insulation resilient material (10) with metal trombone (9).The two sides of ceramic crystal sheet (3) connects with contrary polarity by lead-in wire (13,14), and guides to outer end by the space at metal trombone (9) center.
The physical principle of foundation of the present invention is as follows: when piezoelectric ceramic piece produces deformation under the effect of power, at dielectric surface, the xenogenesis electric charge occurs.The electric weight of this bound charge is directly proportional to acting force, and electric weight is more, and corresponding two surface potential differences (voltage) are also larger, and this phenomenon claims piezoelectric effect.If by certain orientation, piezoelectric ceramic piece is exerted pressure, will produce electric charge so on piezoelectric ceramic piece.If press reverse direction stretching piezoelectric ceramic piece, the electric charge that symbol is contrary occurs on piezoelectric ceramic piece.Extruding or the power stretched are larger, and the electric charge on piezoelectric ceramic piece also can be the more.If the two ends at piezoelectric ceramic piece plate electrode, and pass to alternating current, piezoelectric ceramic piece will periodically elongate or shorten so, starts vibration.
Useful benefit of the present invention: the present invention can carry out the sounding simulation to different conditions servant's vocal cords, the vibration simulation in the time of can realizing the vibration simulation of vocal cords under opening different angles and vocal cords generation pathology by regulating metal trombone; Realize the simulation to high bass by the power of regulating pumping signal, and realize the emulation of the multi-stratification of vocal cords structure; The present invention is simple in structure, easy to operate.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
The local enlarged diagram that Fig. 2 is bossing of the present invention;
The local enlarged diagram that Fig. 3 is metal trombone of the present invention and elastic insulating material coupling part;
Fig. 4 is the outboard profile that the present invention simulates box.
Reference numeral of the present invention is as follows:
1-projection, 2-composite piezoelectric ceramic sheet, 3-ceramic crystal sheet, 4-insulation stickum
5-rubber ring, 6-scale, 7-screw thread, 8-nut, 9-metal trombone
10-insulation resilient material, 11-firm silicone rubber B, 12-simulation box 13-lead-in wire A
14-lead-in wire B, 15-aperture, 16-firm silicone rubber A.
Embodiment
The present invention uses thin rectangular piezoelectric ceramics as vocal cords, and because single piezoelectric ceramic piece is difficult to obtain large amplitude, the present invention adopts the way of two piezo chips to increase amplitude.Two piezo chips are that two piezoelectric ceramic pieces are linked together with contrary polarity, and while making an assembly elongation, another assembly is compressed, thereby produce flexural vibrations.
When piezoelectric ceramic piece one side being added to when polarizing the identical voltage of polarity, due to piezoelectric effect, piezoelectric patches will be subject to the effect of a stress, make the length elongation of piezoelectric ceramic piece.Meanwhile, while being added on the internal polarization opposite direction of the electric field of piezoelectric ceramic piece opposite side and piezoelectric patches, the length of piezoelectric patches shortens under the effect of stress, and result is deformed into whole assembly to be bent upwards.If extrinsic motivated is alternation, two piezo chips have just produced crooked vibration.
The present invention includes the simulation box, metal trombone, nut, rubber ring, projection, composite piezoelectric ceramic sheet, lead-in wire, insulation resilient material, silica gel, rubber.In vibration processes, silica gel, rubber play the effect of simulate muscular layer, are used for hindering stretching and the vibration of vocal cords.
Two ends have the metal trombone (9) of screw thread (7) that two side openings (15) of the simulation box (12) that is uniformly distributed scale (6) are arranged through upper and lower surface respectively, screw thread (7) outermost end has rotatable nut (8), be used for regulating the length of stretching metal trombone (9), simulation box (12) inside has rubber to form annulus (5), in the middle of the inboard of annulus (5), has symmetrical two projections (1) to be used for fixing composite piezoelectric ceramic sheet (2).Composite piezoelectric ceramic sheet (2) by insulation stickum (4) by two identical ceramic crystal sheets (3) formation that is bonded together.The two sides of ceramic crystal sheet (3) connects with contrary polarity by lead-in wire (13,14), and guides to outer end by the space at metal trombone (9) center, and lead-in wire (13) and lead-in wire (14) connect respectively the positive and negative polarities of pumping signal.There is gap in parallel two groups of composite piezoelectric ceramic sheets (2), guarantee that two groups of composite piezoelectric ceramic sheets (2) are independent of each other when vibration.Insulation resilient material (10) (waterproof resin as elastic insulated as 3M 8882) connects the upper and lower corresponding two groups of composite piezoelectric ceramic sheets (2) of metal trombone (9) be fixed in metal trombone (9) above, and rubber ring fills up silica gel inside and outside (5).
While being simulated, the composite piezoelectric ceramic sheet is not opened, in void place state.While carrying out test simulation, according to the test needs, two nuts in rotation left and right, pull open two composite piezoelectric ceramic sheets; About while carrying out normal person's vocal cord vibration simulation, two metal trombones pull open identical length, can determine that whether the length of pulling open is identical by the scale above the simulation box.While carrying out the research of vibration of pathologic vocal cords, the length that two of left and right composite piezoelectric ceramic sheet can be pulled open is pulled open different degree as required, to represent certain vocal cords, has pathology to produce (generation that represents pathology that unfolded length is short).After adjusting length, pumping signal is added respectively, the composite piezoelectric ceramic sheet starts vibration, represents that the pronunciation of vocal cords starts.
Claims (3)
1. simulate the vocal cord vibration bionic device for one kind, it is characterized in that: the composite piezoelectric ceramic sheet has parallel two groups, every group of composite piezoelectric ceramic sheet (2) is comprised of two composite piezoelectric ceramic sheets of upper and lower correspondence, the outer end of parallel two groups of composite piezoelectric ceramic sheets (2) is solidly connected respectively in the projection (1) of the rubber ring (5) of being close to simulation box (12) inwall upper, and the inner metal trombone (9) through simulation box (12) homonymy side opening (15) with vertical direction is solidly connected at the center of simulation box (12) with insulation resilient material (10);
Described composite piezoelectric ceramic sheet (2) by insulation stickum (4) by two identical ceramic crystal sheets (3) formation that is bonded together, the two sides of ceramic crystal sheet (3) is by lead-in wire (13,14) with contrary polarity, connect, and lead-in wire (13,14) guides to outer end by the space at metal trombone (9) center; There is gap in two groups of composite piezoelectric ceramic sheets (2), guarantee that two groups of composite piezoelectric ceramic sheets (2) are independent of each other when vibration.
2. simulation vocal cord vibration bionic device according to claim 1, it is characterized in that: fill firm silicone rubber B(11 in rubber ring (5)), the outer firm silicone rubber A(16 that fills of rubber ring (5)), firm silicone rubber A(16) elastic hardness is greater than firm silicone rubber B(11) so that firm silicone rubber B(11) deformation quantity be greater than firm silicone rubber A(16).
3. simulation vocal cord vibration bionic device according to claim 2 is characterized in that: metal trombone (9) outer end is provided with regulates flexible screw thread (7) and the nut (8) of metal trombone (9).
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| CN 201210036608 CN102623002B (en) | 2012-02-20 | 2012-02-20 | Bionic device for simulating vocal-cord vibration |
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| CN 201210036608 CN102623002B (en) | 2012-02-20 | 2012-02-20 | Bionic device for simulating vocal-cord vibration |
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| CN102623002B true CN102623002B (en) | 2013-12-18 |
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| CN103366726B (en) * | 2013-06-21 | 2015-10-28 | 陕西师范大学 | A kind of bionic device utilizing bipack-film transducer to simulate vocal cord vibration |
| CN112959577B (en) * | 2021-01-29 | 2023-03-03 | 厦门大学 | Underwater soft pneumatic sound source, preparation method thereof and sound production device with sound source |
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| CN101877191A (en) * | 2009-04-29 | 2010-11-03 | 营口巨成教学科技开发有限公司 | Electronic warning trachea cannula training simulation model |
| CN101991473A (en) * | 2009-08-20 | 2011-03-30 | 北京航空航天大学 | Shiatsu type fundamental frequency adjustment electronic artificial larynx |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877191A (en) * | 2009-04-29 | 2010-11-03 | 营口巨成教学科技开发有限公司 | Electronic warning trachea cannula training simulation model |
| CN101991473A (en) * | 2009-08-20 | 2011-03-30 | 北京航空航天大学 | Shiatsu type fundamental frequency adjustment electronic artificial larynx |
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| 最小声门下压与声带拉伸之间的非单调关系;陶超等;《声学技术》;20101231;第29卷(第6期);322-323 * |
| 蒋景英等.声带振动的二质量块-有限元模型.《生物医学工程学杂志》.2005,第22卷(第2期),297-302. |
| 陶超等.最小声门下压与声带拉伸之间的非单调关系.《声学技术》.2010,第29卷(第6期),322-323. |
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