CN102189073A - Ultrasonic wave generator - Google Patents
Ultrasonic wave generator Download PDFInfo
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- CN102189073A CN102189073A CN2010101214029A CN201010121402A CN102189073A CN 102189073 A CN102189073 A CN 102189073A CN 2010101214029 A CN2010101214029 A CN 2010101214029A CN 201010121402 A CN201010121402 A CN 201010121402A CN 102189073 A CN102189073 A CN 102189073A
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Abstract
The invention provides an ultrasonic wave generator. The ultrasonic wave generator comprises a sound producing element and a signal output device which is electrically connected with the sound producing element; and the sound producing element comprises a carbon nanotube structure and the signal output device is used for outputting an electric signal to the carbon nanotube structure to change the density of the medium on the periphery of the carbon nanotube structure so that the ultrasonic wave is generated. The on/off frequency of the electric signal of the signal output device is at least 20,000 hertz. The ultrasonic wave generator has a simple structure.
Description
Technical field
The present invention relates to a kind of ultrasonic wave generation device, relate in particular to a kind of employing carbon nano tube structure and produce hyperacoustic ultrasonic wave generation device.
Background technology
Many film products produce hyperacoustic device (also being called as ultrasonic transducer) at present and roughly comprise mechanical type Supersonic generator, utilize electroacoustic transducer that the magnetostrictive effect of electronic Supersonic generator that electromagnetic induction and electromagnetic action principle make and the electrostriction effect of utilizing piezotransistor and ferromagnetic material makes etc.For example, electroacoustic transducer generally adopts the mode of resonance transducer of piezoelectric ceramics as vibration component, and to hyperacoustic conversion, it is made up of two piezoelectric ceramics, cone, shell and leads etc. usually from the signal of telecommunication in its execution, and structure is comparatively complicated.And, the ultrasonic wave of this Supersonic acoustical generator send and receiving feature only around its resonant frequency than the narrow-band scope in well, its frequency range is narrower.
Since earlier 1990s, be that the nano material of representative has caused that with its particular structure and character people pay close attention to greatly with the CNT.In recent years, along with deepening continuously of CNT and nano materials research, its wide application prospect constantly displayed.For example, because performances such as the electromagnetism of the uniqueness that CNT had, optics, mechanics, chemistry, a large amount of relevant its application studies in fields such as field emitting electronic source, sensor, novel optical material, soft ferromagnetic materials are constantly reported.Yet, do not find as yet but in the prior art that CNT is used for field of acoustics, especially art of ultrasound.
Summary of the invention
In view of this, be necessary to provide a kind of ultrasonic wave generation device simple in structure.
A kind of ultrasonic wave generation device, it comprises a sounding component and a signal output apparatus that is electrically connected with this sounding component; This sounding component comprises a carbon nano tube structure, this signal output apparatus is used to export the signal of telecommunication changes this carbon nano tube structure Media density on every side to this carbon nano tube structure, thereby the generation ultrasonic wave, the signal of telecommunication switching frequency of this signal output apparatus is at least 20,000 hertz.
With respect to prior art, ultrasonic wave generation device provided by the invention utilizes the CNT characteristics rapidly of conducting heat, and makes surrounding medium expand with heat and contract with cold, thereby periodically variable density of high-frequency takes place, thereby produces ultrasonic wave.Ultrasonic wave generation device provided by the invention is simple in structure, and carbon nano tube structure can be made into different shape and size, therefore is applicable to the ultrasonic wave generation device of various ways.
Description of drawings
Fig. 1 is the schematic diagram of the ultrasonic wave generation device that provides of the embodiment of the invention.
The main element symbol description
Ultrasonic wave generation device 10
The specific embodiment
See also Fig. 1, the ultrasonic wave generation device 10 that the embodiment of the invention provides comprises 14, one first electrodes 151 of 12, one sounding components of a signal output apparatus and one second electrode 152.
This sounding component 14 is carbon nano tube structures, for example can be the carbon nano tube structure of stratiform, wire or other shape.This carbon nano tube structure comprises at least one carbon nano-tube film, at least one liner structure of carbon nano tube or its combination.Particularly, this carbon nano tube structure can comprise a plurality of parallel and do not have that lay in the gap or/and the carbon nano-tube film that overlaps and lay.This carbon nano tube structure can comprise a plurality ofly be arranged in parallel, arranged in a crossed manner or by the liner structure of carbon nano tube of certain way braiding.This carbon nano tube structure can comprise that also at least one liner structure of carbon nano tube is arranged on this at least one carbon nano-tube film surface.These a plurality of liner structure of carbon nano tube can be arranged in parallel, arranged in a crossed manner or be arranged on this carbon nano-tube film surface by the certain way braiding.
Preferably, this sounding component 14 comprises a carbon nano tube structure of being made up of a plurality of carbon nanocoils that be arranged in parallel, and whole carbon nano-structured length is 5cm～10cm, and thickness is 0.1 μ m～10 μ m.This is carbon nano-structured to have first end 141 and second end 142 in the longitudinal direction.
This sounding component is electrically connected with this signal output apparatus 12.Particularly, this first electrode 151 and second electrode 152 are connected first end 141 and second end 142 of these sounding component 14 length directions respectively, and this first electrode 151 and this second electrode 152 are electrically connected with this signal output apparatus 12 respectively.This first electrode 151 and second electrode 152 also play the effect of supporting this sounding component 14.
In addition, this first electrode 151 and second electrode 152 can be electrically connected with the two ends of this signal output apparatus 12 by external wire 16, are used for the signal of telecommunication of this signal output apparatus 12 is input in this sounding component 14.
This signal output apparatus 12 comprises power supply 121 and signal processor 122.This power supply 121 is a dc source, and output voltage is 5～12 volts.The conducting and the closure of these signal processor 122 control circuits, and switching frequency is at least 2 ten thousand hertz.
This first electrode 151 and second electrode 152 are formed by conductive material, and its concrete shape and structure is not limit.Particularly, the shape of this first electrode 151 and second electrode 152 may be selected to be stratiform, bar-shaped, block or other shape.The material of this first electrode 151 and second electrode 152 may be selected to be metal, conducting resinl, CNT, indium tin oxide (ITO) etc.In the embodiment of the invention, this first electrode 151 and second electrode 152 are bar-shaped metal electrode.Because this first electrode 151 and second electrode 152 are separately positioned on the two ends of this sounding component 14, can insert certain resistance when this sounding component 14 is applied to ultrasonic wave generation device 10 and avoid short circuit phenomenon to produce.Because CNT has great specific area, under the effect of Fan Shi gravitation, this carbon nano tube structure itself has good adhesiveness, so when adopting this carbon nano tube structure to make sounding component 14, can directly be adhered fixed between this first electrode 151 and second electrode 152 and this sounding component 14, and formation well electrically contacts.
In addition, can further include a conduction tack coat (figure does not show) between this first electrode 151 and second electrode 152 and this sounding component 14.This conduction tack coat can be arranged at this sounding component 14 and the contacted surface of electrode.This conduction tack coat can also make this first electrode 151 and second electrode 152 and this sounding component 14 fixing better when realizing that first electrode 151 and second electrode 152 electrically contact with this sounding component 14.In the present embodiment, this conduction tack coat is one deck elargol.
Be appreciated that when this sounding component has the self-supporting performance this first electrode 151 and second electrode 152 are selectable structure.This signal output apparatus 12 can directly be electrically connected with this sounding component 14 by modes such as lead or contact conductors.In addition, any mode that realizes being electrically connected between this signal output apparatus 12 and this sounding component 14 is all within the protection domain of the technical program.
This signal output apparatus 12 is electrically connected with this first electrode 151 and second electrode 152 by lead 16, and by this first electrode 151 and second electrode 152 signal of telecommunication is input in the sounding component 14.This signal output apparatus 12 is electrically connected with this first electrode 151 and second electrode 152 by lead 16.
Above-mentioned ultrasonic wave generation device 10 in use, because carbon nano tube structure is made up of equally distributed CNT, and this carbon nano tube structure is stratiform or wire, has bigger specific area, so this carbon nano tube structure has less unit are thermal capacitance and bigger heat-delivery surface.
During circuit turn-on, carbon nano tube structure can heat up rapidly, during closing of circuit, carbon nano tube structure is lowered the temperature rapidly, switch by controlling this circuit is so that this carbon nano tube structure produces periodic variations in temperature, because this carbon nano tube structure and surrounding medium (for example air) can carry out the Rapid Thermal exchange, make surrounding medium expand with heat and contract with cold, thereby generating period variable density.When this circuit carried out switch motion with at least 2 ten thousand hertz frequency, the surrounding medium occurrence frequency was higher than 20,000 hertz mechanical shock, thereby produced ultrasonic wave.This hyperacoustic direction of propagation is vertical with the length direction of this sounding component 14.
Above-mentioned ultrasonic wave generation device 10 may further include an airtight shell, so the medium around the sounding component 14 can be placed in the limited space, thereby produces better ultrasonic wave effect.
The ultrasonic wave generation device of forming by above-mentioned sounding component 14 10 can be in air dielectric sounding, be with a wide range of applications, for example be applied to radar for backing car etc.In addition, the carbon nano tube structure in the present embodiment has toughness and mechanical strength preferably, can make the ultrasonic wave generation device 10 of different shape and size easily.
Be understandable that those skilled in the art also can do other variation in spirit of the present invention, all should be included within the present invention's scope required for protection.
Claims (10)
1. ultrasonic wave generation device, it comprises a sounding component and a signal output apparatus that is electrically connected with this sounding component; It is characterized in that: this sounding component comprises a carbon nano tube structure, this signal output apparatus is used to export the signal of telecommunication changes this carbon nano tube structure Media density on every side to this carbon nano tube structure, thereby the generation ultrasonic wave, the signal of telecommunication switching frequency of this signal output apparatus is at least 20,000 hertz.
2. ultrasonic wave generation device as claimed in claim 1 is characterized in that: the signal of telecommunication of this signal output apparatus output is a dc signal.
3. ultrasonic wave generation device as claimed in claim 2 is characterized in that: the output voltage of this signal output apparatus is 5～12 volts.
4. ultrasonic wave generation device as claimed in claim 1, it is characterized in that: this ultrasonic wave generation device also comprises one first electrode and one second electrode, this first electrode and this second electrode are electrically connected with this signal output apparatus respectively, and this first electrode and this second electrode are electrically connected with the two ends of this sounding component respectively.
5. ultrasonic wave generation device as claimed in claim 1 is characterized in that: this carbon nano tube structure comprises the combination of at least one carbon nano-tube film, at least one liner structure of carbon nano tube or carbon nano-tube film and liner structure of carbon nano tube.
6. ultrasonic wave generation device as claimed in claim 5 is characterized in that: this carbon nano tube structure comprises a plurality of parallel and do not have that lay in the gap or/and the carbon nano-tube film that overlaps and lay.
7. ultrasonic wave generation device as claimed in claim 5 is characterized in that: this carbon nano tube structure comprise a plurality ofly be arranged in parallel, arranged in a crossed manner or by the liner structure of carbon nano tube of certain way braiding.
8. ultrasonic wave generation device as claimed in claim 5 is characterized in that: this carbon nano tube structure is arranged on the surface of this at least one carbon nano-tube film at least one liner structure of carbon nano tube.
9. ultrasonic wave generation device as claimed in claim 8 is characterized in that: these a plurality of liner structure of carbon nano tube be arranged in parallel, arranged in a crossed manner or be arranged on the surface of this at least one carbon nano-tube film by the certain way braiding.
10. as each described ultrasonic wave generation device in the claim 1～9, it is characterized in that: the length of this sounding component is 5cm～10cm, and thickness is 0.1 μ m～10 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101214029A CN102189073A (en) | 2010-03-10 | 2010-03-10 | Ultrasonic wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101214029A CN102189073A (en) | 2010-03-10 | 2010-03-10 | Ultrasonic wave generator |
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| CN102189073A true CN102189073A (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101214029A Pending CN102189073A (en) | 2010-03-10 | 2010-03-10 | Ultrasonic wave generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103999483B (en) * | 2012-04-19 | 2017-03-01 | 奥林巴斯株式会社 | The manufacture method of ultrasonic wave generator and the package system of ultrasonic wave generator |
| CN114225247A (en) * | 2021-12-06 | 2022-03-25 | 大连理工大学 | Flexible variable-frequency ultrasonic therapy probe based on carbon nanotube film thermoacoustic effect |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821048A (en) * | 2005-02-18 | 2006-08-23 | 中国科学院理化技术研究所 | Micronl nano thermoacoustic vibration excitor based on thermoacoustic conversion |
| CN101600139A (en) * | 2008-06-04 | 2009-12-09 | 清华大学 | sound-producing device |
| CN101751916A (en) * | 2008-12-12 | 2010-06-23 | 清华大学 | ultrasonic acoustic generator |
-
2010
- 2010-03-10 CN CN2010101214029A patent/CN102189073A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821048A (en) * | 2005-02-18 | 2006-08-23 | 中国科学院理化技术研究所 | Micronl nano thermoacoustic vibration excitor based on thermoacoustic conversion |
| CN101600139A (en) * | 2008-06-04 | 2009-12-09 | 清华大学 | sound-producing device |
| CN101751916A (en) * | 2008-12-12 | 2010-06-23 | 清华大学 | ultrasonic acoustic generator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103999483B (en) * | 2012-04-19 | 2017-03-01 | 奥林巴斯株式会社 | The manufacture method of ultrasonic wave generator and the package system of ultrasonic wave generator |
| CN114225247A (en) * | 2021-12-06 | 2022-03-25 | 大连理工大学 | Flexible variable-frequency ultrasonic therapy probe based on carbon nanotube film thermoacoustic effect |
| CN114225247B (en) * | 2021-12-06 | 2022-11-01 | 大连理工大学 | Flexible variable-frequency ultrasonic therapy probe based on carbon nanotube film thermoacoustic effect |
| US11766577B2 (en) | 2021-12-06 | 2023-09-26 | Dalian University Of Technology | Flexible variable frequency ultrasonic therapeutic probe based on thermoacoustic effect of carbon nanotube film |
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Application publication date: 20110921 |