JP4363987B2 - 超音波振動ビームを収束する装置 - Google Patents
超音波振動ビームを収束する装置 Download PDFInfo
- Publication number
- JP4363987B2 JP4363987B2 JP2003564855A JP2003564855A JP4363987B2 JP 4363987 B2 JP4363987 B2 JP 4363987B2 JP 2003564855 A JP2003564855 A JP 2003564855A JP 2003564855 A JP2003564855 A JP 2003564855A JP 4363987 B2 JP4363987 B2 JP 4363987B2
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- JP
- Japan
- Prior art keywords
- lens
- ultrasonic vibration
- convergence
- converging
- circular regions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/30—Sound-focusing or directing, e.g. scanning using refraction, e.g. acoustic lenses
Description
lpは、レンズの周辺部厚さを表し、
lcは、レンズ軸方向の厚さを表し、
doは、レンズの直径を表し、
Rは、レンズの凹面の曲率半径を表す。
lc=1.5mm
do=10mm
装置は焦点距離7.0mmおよび焦点領域0.02cm2を有するものとする。
lc=1.5mm
do=10mm
R=7.5mm
装置は焦点距離10.0mmおよび焦点領域0.025cm2を有するものとする。
lc=1.5mm
do=10mm
R=6.26mm
装置は焦点距離7.6mmおよび焦点領域0.02cm2を有するものとする。
周辺部のレンズの厚さ−l2=7.5mm
軸でのレンズの厚さ−l3=1.5mm
レンズ面の曲率半径−R=15.25mm
組立品の直径−D=25mm
これらは、図8〜10に示されている。
周辺部のレンズの厚さ−l2=4mm
軸でのレンズの厚さ−l3=1.5mm
レンズ面の曲率半径−R=6.25mm
組立品の直径−D=10mm
これらは、図5〜7に示されている。
5sの音響発生間の伝送エネルギー=4.142×5=20.17J
TEGにより吸収される平均エネルギー=2.4×0.562×15=20.25J
音響発生プロセスの効率=20.25/20.71=97.8%
したがって、TEGは音響吸収の評価には優れた試験材料である。
Claims (6)
- 超音波振動を発生する手段と、
前記発生手段に固定され、かつ所定領域に前記超音波振動を収束するレンズ手段と、
を具備し、
前記レンズ手段は、同心状に連なって配置されている実質的にいくつかの円領域に分割され、前記領域であって、隣接する領域同士の波速は異なる波速を有する材料で構成されていることを特徴とする超音波振動ビームを収束する装置。 - 前記連なっている実質的にいくつかの円領域の波速速度は、最も中心の前記領域と、最も外側の前記領域との間で連続して変化することを特徴とする請求項1に記載の超音波振動ビームを収束する装置。
- 前記連なっている実質的にいくつかの円領域の波速速度は、最も中心の前記領域と、最も外側の前記領域との間で連続して上昇することを特徴とする請求項2に記載の超音波振動ビームを収束する装置。
- 前記レンズ手段は、平凹面レンズであることを特徴とする前記全ての請求項のいずれか1項に記載の超音波振動ビームを収束する装置。
- 前記実質的にいくつかの円領域は、隣接する実質的にいくつかの円領域から絶縁材料によって分離していることを特徴とする前記全ての請求項のいずれか1項に記載の超音波振動ビームを収束する装置。
- 前記レンズ手段は、チタン、チタン合金、アルミニウム、アルミニウム合金、またはこのような材料の任意の1つ、または複数を有する混合物を含むことを特徴とする前記全ての請求項のいずれか1項に記載の超音波振動ビームを収束する装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0201978A GB0201978D0 (en) | 2002-01-29 | 2002-01-29 | Method and apparatus for focussing ultrasonic energy |
GB0212187A GB2384674B (en) | 2002-01-29 | 2002-05-28 | Method and apparatus for focussing ultrasonic energy |
PCT/GB2003/000349 WO2003065347A1 (en) | 2002-01-29 | 2003-01-28 | Method and apparatus for focussing ultrasonic energy |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005516512A JP2005516512A (ja) | 2005-06-02 |
JP4363987B2 true JP4363987B2 (ja) | 2009-11-11 |
Family
ID=27665353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003564855A Expired - Fee Related JP4363987B2 (ja) | 2002-01-29 | 2003-01-28 | 超音波振動ビームを収束する装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7674233B2 (ja) |
EP (1) | EP1470546B1 (ja) |
JP (1) | JP4363987B2 (ja) |
WO (1) | WO2003065347A1 (ja) |
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-
2003
- 2003-01-28 WO PCT/GB2003/000349 patent/WO2003065347A1/en active Application Filing
- 2003-01-28 EP EP03702710.9A patent/EP1470546B1/en not_active Expired - Lifetime
- 2003-01-28 US US10/502,919 patent/US7674233B2/en not_active Expired - Fee Related
- 2003-01-28 JP JP2003564855A patent/JP4363987B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20050143677A1 (en) | 2005-06-30 |
US7674233B2 (en) | 2010-03-09 |
WO2003065347A1 (en) | 2003-08-07 |
EP1470546A1 (en) | 2004-10-27 |
EP1470546B1 (en) | 2013-11-27 |
JP2005516512A (ja) | 2005-06-02 |
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