JP4215270B2 - マッチさせた音響インピーダンスを有する装置およびその方法 - Google Patents
マッチさせた音響インピーダンスを有する装置およびその方法 Download PDFInfo
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- JP4215270B2 JP4215270B2 JP2006509218A JP2006509218A JP4215270B2 JP 4215270 B2 JP4215270 B2 JP 4215270B2 JP 2006509218 A JP2006509218 A JP 2006509218A JP 2006509218 A JP2006509218 A JP 2006509218A JP 4215270 B2 JP4215270 B2 JP 4215270B2
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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
- G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Networks Using Active Elements (AREA)
- Electrotherapy Devices (AREA)
Description
圧電材料:PZT。Z1=34×106Kg/m2・s。第1の伝達層:アルミニウム。V=6325m/s。Z2=17×106Kg/m2・s。1MHzにおけるP/8=1000/8=125ns。ここで、1000nsはMHz周波数での1周期、P。したがって、この層の厚さは125×10−9×6,325,000=0.79mmである。
第2の伝達層:硬質エポキシ。V=2600m/s。Z3=3×106Kg/m2・s。1MHzでのP/16=1000/16=62.5ns。したがって、この層の厚さは62.5×10−9×2,600,000=0.16mmである。表面層:クレーコート紙。V=500m/s。Z4=0.6×106Kg/m2・s。1MHzでのP/16=1000/16=62.5ns。したがって、この層の厚さは62.5×10−9×500,000=0.03mmである。」
圧電層(PZT) 34×106Kg/m2・s
アルミニウム層 17×106Kg/m2・s
アルミニウム複合層 7×106Kg/m2・s
エポキシ層 3×106Kg/m2・s
紙表面層 0.3×106Kg/m2・s」
Claims (8)
- インピーダンスをマッチさせた3若しくはそれ以上の層を有するトランスデューサを作成する方法であって、
音響源インピーダンスZ0を有する圧電素子を提供する工程と、
標的インピーダンスZ(N+1)を有する標的媒体を選択する工程と、
2より大きい整数である、マッチング層の数Nを定義する工程と、
各マッチング層Jであって、Jは1から、定義された前記マッチング層の数Nまで漸増し、各マッチング層Jについて、
次式に従って必要なインピーダンスを決定する工程と、
正の整数値nJと、選択された前記マッチング層J用の材料の厚さLJとを、次式に従って決定する工程と、
を有する、インピーダンスをマッチさせた3若しくはそれ以上の層を有するトランスデューサを作成する方法。 - インピーダンスをマッチさせた複数の層を有するトランスデューサを作成する方法であって、
導出された有効音響源インピーダンスZEFFを有する音響源を提供する工程と、
標的インピーダンスZ(N+1)を有する標的媒体を選択する工程と、
1より大きい整数である、マッチング層の数Nを定義する工程と、
各マッチング層Jであって、Jは1から、定義された前記マッチング層の数Nまで漸増し、各マッチング層Jについて、
次式に従って必要なインピーダンスを決定する工程と、
正の整数値nJと、選択された前記マッチング層J用の材料の厚さLJとを、次式に従って決定する工程と、
を有する、インピーダンスをマッチさせた複数の層を有するトランスデューサを作成する方法。 - 請求項2のインピーダンスをマッチさせた複数の層を有するトランスデューサを作成する方法であって、この方法は、さらに、
音響インピーダンスを有する第1の媒体内で、音響源により音圧を生成する工程と、
受信トランスデューサによって、前記第1の媒体内で前記音響源により生成された音圧を測定する工程と、
音響インピーダンスを有する第2の媒体内で、前記音響源により音圧を生成する工程と、
前記受信トランスデューサによって、前記第2の媒体内で前記音響源により生成された音圧を測定する工程と、
前記第1の媒体の音響インピーダンスと、前記第2の媒体の音響インピーダンスと、前記受信トランスデューサにより測定された前記第1の媒体内の音圧と、前記受信トランスデューサにより測定された前記第2の媒体内の音圧とに基づき、前記導出された有効音響源インピーダンスを決定する工程と
を有するものである。 - 請求項6の物品において、前記標的媒体は空気である。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45217303P | 2003-03-04 | 2003-03-04 | |
US10/793,311 US6954406B2 (en) | 2003-03-04 | 2004-03-03 | Acoustical source and transducer having, and method for, optimally matched acoustical impedance |
PCT/US2004/006930 WO2004080113A2 (en) | 2003-03-04 | 2004-03-04 | Device having matched accoustical impedance and method |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006520175A JP2006520175A (ja) | 2006-08-31 |
JP4215270B2 true JP4215270B2 (ja) | 2009-01-28 |
Family
ID=32930680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006509218A Expired - Lifetime JP4215270B2 (ja) | 2003-03-04 | 2004-03-04 | マッチさせた音響インピーダンスを有する装置およびその方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US6954406B2 (ja) |
EP (1) | EP1600031B1 (ja) |
JP (1) | JP4215270B2 (ja) |
AT (1) | ATE537534T1 (ja) |
HK (1) | HK1088388A1 (ja) |
WO (1) | WO2004080113A2 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2391625A (en) | 2002-08-09 | 2004-02-11 | Diagnostic Ultrasound Europ B | Instantaneous ultrasonic echo measurement of bladder urine volume with a limited number of ultrasound beams |
US8221321B2 (en) | 2002-06-07 | 2012-07-17 | Verathon Inc. | Systems and methods for quantification and classification of fluids in human cavities in ultrasound images |
US20060006765A1 (en) * | 2004-07-09 | 2006-01-12 | Jongtae Yuk | Apparatus and method to transmit and receive acoustic wave energy |
US7819806B2 (en) | 2002-06-07 | 2010-10-26 | Verathon Inc. | System and method to identify and measure organ wall boundaries |
US8221322B2 (en) | 2002-06-07 | 2012-07-17 | Verathon Inc. | Systems and methods to improve clarity in ultrasound images |
US7706213B2 (en) * | 2006-10-23 | 2010-04-27 | Nancy Ann Winfree | Mechanical filter for sensors |
US8167803B2 (en) | 2007-05-16 | 2012-05-01 | Verathon Inc. | System and method for bladder detection using harmonic imaging |
WO2010017508A1 (en) | 2008-08-07 | 2010-02-11 | Verathon Inc. | Device, system, and method to measure abdominal aortic aneurysm diameter |
US8408065B2 (en) * | 2009-03-18 | 2013-04-02 | Bp Corporation North America Inc. | Dry-coupled permanently installed ultrasonic sensor linear array |
US20100249670A1 (en) * | 2009-03-20 | 2010-09-30 | Cutera, Inc. | High-power multiple-harmonic ultrasound transducer |
RU2471571C2 (ru) * | 2011-08-10 | 2013-01-10 | Общество с ограниченной ответственностью "Центр ультразвуковых технологий АлтГТУ" | Ультразвуковая колебательная система |
GB2528338B (en) * | 2014-11-28 | 2016-07-13 | 168 Ultrasound Pte Ltd | Ultrasound apparatus and method |
JP6304168B2 (ja) * | 2015-08-06 | 2018-04-04 | Tdk株式会社 | 圧電モジュール |
CN110300631B (zh) * | 2017-02-24 | 2021-09-24 | 传感频谱有限责任公司 | 其中包括声学匹配区域的超声设备 |
US11664779B2 (en) | 2019-07-03 | 2023-05-30 | Toyota Motor Engineering & Manufacturing North America, Inc. | Acoustic impedance matching with bubble resonators |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2411948A (en) * | 1945-12-22 | 1946-12-03 | Crompton & Knowles Loom Works | Mounting for bobbin receivers for weft replenishing looms |
US4016530A (en) * | 1975-06-02 | 1977-04-05 | Goll Jeffrey H | Broadband electroacoustic converter |
US4211948A (en) * | 1978-11-08 | 1980-07-08 | General Electric Company | Front surface matched piezoelectric ultrasonic transducer array with wide field of view |
US4366406A (en) * | 1981-03-30 | 1982-12-28 | General Electric Company | Ultrasonic transducer for single frequency applications |
DE3501808A1 (de) * | 1985-01-21 | 1986-07-24 | Siemens AG, 1000 Berlin und 8000 München | Ultraschallwandler |
ATE388388T1 (de) | 1997-06-19 | 2008-03-15 | Mahesh C Bhardwaj | Ultraschallwander für hohe transduktion in gasen und verfahren zur berührungslosen ultraschall- übertragung in festen materialien |
-
2004
- 2004-03-03 US US10/793,311 patent/US6954406B2/en not_active Expired - Lifetime
- 2004-03-04 EP EP04717511A patent/EP1600031B1/en not_active Expired - Lifetime
- 2004-03-04 JP JP2006509218A patent/JP4215270B2/ja not_active Expired - Lifetime
- 2004-03-04 WO PCT/US2004/006930 patent/WO2004080113A2/en active Application Filing
- 2004-03-04 AT AT04717511T patent/ATE537534T1/de active
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2006
- 2006-08-02 HK HK06108582.1A patent/HK1088388A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JP2006520175A (ja) | 2006-08-31 |
WO2004080113A2 (en) | 2004-09-16 |
EP1600031A2 (en) | 2005-11-30 |
US6954406B2 (en) | 2005-10-11 |
WO2004080113A3 (en) | 2005-03-31 |
EP1600031B1 (en) | 2011-12-14 |
EP1600031A4 (en) | 2009-04-08 |
HK1088388A1 (en) | 2006-11-03 |
ATE537534T1 (de) | 2011-12-15 |
US20040174772A1 (en) | 2004-09-09 |
WO2004080113B1 (en) | 2005-05-19 |
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