CN201638552U - Ultrasonic acoustic beam guide device - Google Patents
Ultrasonic acoustic beam guide device Download PDFInfo
- Publication number
- CN201638552U CN201638552U CN2009201558768U CN200920155876U CN201638552U CN 201638552 U CN201638552 U CN 201638552U CN 2009201558768 U CN2009201558768 U CN 2009201558768U CN 200920155876 U CN200920155876 U CN 200920155876U CN 201638552 U CN201638552 U CN 201638552U
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- reflecting surface
- acoustic beam
- guide piece
- ultrasonic
- guide cavity
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to an ultrasonic acoustic beam guide device. The device is characterized by comprising a guide cavity, a reflecting device and a fence, wherein the guide cavity is in a shape of an ordinary pipeline; the fence is connected with the guide cavity; and the reflecting surface of the reflecting device is contained in the guide cavity and the fence. In the device, ultrasonic waves which are emitted by an ultrasonic transducer and transmitted in the air of the guide cavity are reflected by the reflecting surface of the reflecting device, then led outside the guide cavity through a gap of the fence to be continued to transmit through air so as to form an ultrasonic acoustic beam of 360 degrees.
Description
Technical field
The utility model relates to a kind of ultrasonic wave acoustic beam guide piece, belongs to field of information processing.
Background technology
When present disclosed digital pen product can write on common paper, paint, person's handwriting is shown on computers truly, be implemented on the computer then and edit arbitrarily, store, print, be widely used in various fields and occasions such as electronic teaching, meeting speech.Wherein in the digital pen system based on the ultrasound wave principle, be the characteristic of utilizing ultrasonic propagation velocity slower, determine the relative position of transmitter and receiver according to the mistiming that on diverse location, receives the ultrasonic signal that ultrasonic transmitter sends at ultrasonic receiver.The emitting head emission ultrasonic signal that the transmitter of ultrasound wave digital pen uses polyvinyl fluoride (PVDF) membrane material to make substantially, the emission angle of the acoustic beam of launching under the instant high-voltage excitation is 360 degree, has satisfied the requirement of its digital pen preferably.But its shortcoming is to responsive to temperature, and operating temperature range is narrow, and other major defect is to cost an arm and a leg.
Common on the market piezoelectric ceramic ultrasound transducer volume is little, highly sensitive, dependable performance, cheap, be electronic installations such as remote control, remote measurement, warning, its acoustic beam directive property is higher, the ultrasonic emitting angle is generally about 60 degree, because of its emission angle is little, when using on digital pen, receiver is easy to occur not receiving the situation of signal, uses poor effect on digital pen.
Because hyperacoustic wavelength is short, the ultrasound wave ray can be the same with light, can reflect, reflect, and also can focus on.Ultrasound wave is being organized to another kind from a kind of organizational communication, owing to organize the acoustic impedance difference, has just produced reflection, refraction and transmission phenomenon on the interphase that acoustic impedance changes.Know that by reflection theorem the difference of the size of the energy that reflects and interface both sides medium acoustic impedance and the orientation of interface, size are relevant.
Summary of the invention
The purpose of this utility model is that low-angle ultrasonic transducer is applied to digital pen, reduces the cost of required ultrasonic transmitter greatly, thereby has reduced the cost of whole digital pen product, has also increased the operating temperature range of digital pen.The utility model has solved the little problem of ultrasonic transducer emission angle, make its generation acoustic beam through behind the guide piece, hyperacoustic emission angle can reach 360 degree, the needs that use on digital pen have been satisfied, operating temperature range and reliability have been improved, greatly reduce cost, and can use in other field.
This ultrasonic wave acoustic beam guide piece comprises guide cavity, reflection unit and fence, this device can make the ultrasound wave in the guide cavity air, propagated after the reflecting surface of reflection unit is reflected again the space by fence export to outside the guide cavity and continue to propagate by air, the maximum propagation angle is the ultrasonic wave acoustic beams of 360 degree thereby form in one plane.When with ultrasound transducer apparatus a certain position in guide cavity, its surface of emission orientating reflex device, the ultrasonic wave acoustic beam that ultrasonic transducer is launched is propagated in the air of guide cavity, behind the surface of emission of acoustic beam arrival reflection unit, be reflected, it is outer by air continuation propagation to export to guide cavity by the space of fence, thereby forms the ultrasonic wave acoustic beams of 360 degree.
Adopt the reflection unit of different reflectings surface just can control hyperacoustic power and the angle that reflects guide cavity.When adopting straight circular cone and hemispheric reflecting surface, ultrasound wave can be derived guide cavity equably, be formed on the uniform ultrasound wave of the interior strength ratio of angle of 360 degree, can be used for the location of ultrasound wave digital pen.If adopt erose reflecting surface, just can derive the ultrasonic signal that varying strength is arranged on different angles.When employing is the reflecting surface of the curved surface of convex,, just can guarantee the stronger ultrasonic signal derivation guide cavity that is reflected according to reflection theorem.
When the reflecting surface that adopts was a plane, the ultrasonic wave acoustic beam that ultrasonic transducer is launched was propagated in the air of guide cavity, can export to by the space of fence outside the guide cavity to continue to propagate by air, thereby form 360 ultrasonic wave acoustic beams of spending.
Description of drawings
Fig. 1 is that the reflecting surface when reflection unit is straight conical digital pen decomposing schematic representation.
Fig. 2 is that the reflecting surface when reflection unit is conical digital pen assembling synoptic diagram.
Fig. 3 is that the reflecting surface when reflection unit is the digital pen decomposing schematic representation of planar shaped.
Fig. 4 is that the reflecting surface when reflection unit is hemispheric digital pen decomposing schematic representation.
In each figure, 1. guide cavity, 2. ultrasonic transducer, 3. fence, 4. reflection unit, 5. reflecting surface
Embodiment
Below be first embodiment.Referring to synoptic diagram 1, a body of digital pen can be used as the guide cavity (1) of this guide piece, piezoelectric ceramic ultrasound transducer (2) is placed guide cavity (1) front end, piezoelectric ceramic ultrasound transducer (2) ultrasonic waves transmitted acoustic beam can be in straight conical reflecting surface (5) the reflection back that is placed in nib place reflection unit (4) to propagating all around, when the circular cone cone angle is an angle of 90 degrees, according to reflection theorem, ultrasonic wave acoustic beam can be reflected with an angle of 90 degrees, space by fence (3) exports to outside the guide cavity (1) by air continuation propagation then, this moment just with ultrasound waveguide to required orientation, and to enlarge hyperacoustic emission angle be 360 degree, can be satisfied the requirement of the location on the digital pen by the ultrasound wave of being derived.Referring to accompanying drawing 2, this is that a reflecting surface when reflection unit is straight conical digital pen assembling synoptic diagram, by such ultrasonic wave acoustic beam guide piece, the low-angle ultrasonic signal that piezoelectric ceramic ultrasound transducer (2) produces is directed to, become along propagating with a body vertical direction, and its emission angle is 360 angle ultrasonic signals, can be as ultrasound wave digital pen location.
Below be second embodiment.Referring to synoptic diagram 3, a body of digital pen can be used as the guide cavity (1) of this guide piece, piezoelectric ceramic ultrasound transducer (2) is placed certain position of guide cavity (1), piezoelectric ceramic ultrasound transducer (2) ultrasonic waves transmitted acoustic beam can be to propagating all around after the reflecting surface (5) that is placed in nib place reflection unit (4) is gone up diffuse reflection, space by fence (3) exports to outside the guide cavity (1) by air continuation propagation then, this moment just with ultrasound waveguide to required orientation, and to enlarge hyperacoustic emission angle be 360 degree, can be satisfied the requirement of the location on the digital pen by the ultrasound wave of being derived.
Below be the 3rd embodiment.Referring to synoptic diagram 4, a body of digital pen can be used as the guide cavity (1) of this guide piece, certain ultrasonic transducer (2) is placed certain position of guide cavity (1), ultrasonic transducer (2) ultrasonic waves transmitted acoustic beam can be in semisphere reflecting surface (5) the reflection back that is placed in nib place reflection unit (4) to propagating all around, space by fence (3) exports to outside the guide cavity (1) by air continuation propagation then, this moment just with ultrasound waveguide to needed orientation, and to enlarge hyperacoustic emission angle be 360 degree, can be satisfied the requirement of the location on the digital pen by the ultrasound wave of being derived.
Claims (6)
1. ultrasonic wave acoustic beam guide piece is characterized in that it is made up of guide cavity, reflection unit and fence, is provided with ultrasonic transducer emission ultrasound wave in guide cavity, guide piece the fence place be provided with reflection unit.
2. by the described a kind of ultrasonic wave acoustic beam guide piece of claim 1, it is characterized in that the fence place of guide piece also is provided with reflecting surface, described reflecting surface can be straight taper shape.
3. by the described a kind of ultrasonic wave acoustic beam guide piece of claim 1, it is characterized in that the fence place of guide piece also is provided with reflecting surface, described reflecting surface can be a semisphere.
4. by the described a kind of ultrasonic wave acoustic beam guide piece of claim 1, it is characterized in that the fence place of guide piece also is provided with reflecting surface, described reflecting surface can be the plane.
5. by the described a kind of ultrasonic wave acoustic beam guide piece of claim 1, it is characterized in that the fence place of guide piece also is provided with reflecting surface, described reflecting surface can be the curved surface of convex.
6. by the described a kind of ultrasonic wave acoustic beam guide piece of claim 1, it is characterized in that the ultrasonic transducer in the guide piece can be the piezoelectric ceramic ultrasound transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201558768U CN201638552U (en) | 2009-05-11 | 2009-05-11 | Ultrasonic acoustic beam guide device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201558768U CN201638552U (en) | 2009-05-11 | 2009-05-11 | Ultrasonic acoustic beam guide device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638552U true CN201638552U (en) | 2010-11-17 |
Family
ID=43083056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201558768U Expired - Fee Related CN201638552U (en) | 2009-05-11 | 2009-05-11 | Ultrasonic acoustic beam guide device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496361A (en) * | 2011-12-27 | 2012-06-13 | 东南大学 | Ultrasonic wireless energy transmission enhancement device |
-
2009
- 2009-05-11 CN CN2009201558768U patent/CN201638552U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496361A (en) * | 2011-12-27 | 2012-06-13 | 东南大学 | Ultrasonic wireless energy transmission enhancement device |
| CN102496361B (en) * | 2011-12-27 | 2013-06-12 | 东南大学 | Ultrasonic wireless energy transmission enhancement device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LI XINGCHAO Free format text: FORMER OWNER: XUAN YONGNAN Effective date: 20110812 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 150000 GUANGZHOU, GUANGDONG PROVINCE TO: 510641 GUANGZHOU, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110812 Address after: 904 room 20, building 510641, west two, South China University of Technology, Guangdong, Guangzhou Patentee after: Li Xingchao Address before: 150000 Guangzhou City, Guangdong Province Patentee before: Xuan Yongnan |
|
| ASS | Succession or assignment of patent right |
Owner name: AMAX TECHNOLOGIES (GUANGZHOU) CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111024 Address after: 904 room 20, building 510641, west two, South China University of Technology, Guangdong, Guangzhou Co-patentee after: Amax Technologies (Guangzhou) Co., Ltd. Patentee after: Li Xingchao Address before: 904 room 20, building 510641, west two, South China University of Technology, Guangdong, Guangzhou Patentee before: Li Xingchao |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20140511 |