JP2010520464A - 超音波圧力センサおよびこの超音波圧力センサを動作させる方法 - Google Patents
超音波圧力センサおよびこの超音波圧力センサを動作させる方法 Download PDFInfo
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- pressure sensor
- ultrasonic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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Abstract
Description
本出願は、2005年12月22日にZhouによって出願された「Image−Guided Laser Catheter」という名称の米国特許出願第11/315,546号の一部継続出願であり、さらに2007年2月28日にZhouによって出願された「Ultrasonic Sensor」という名称の米国特許仮出願第60/891,986号に基づいており、これらは共に本出願の権利者が所有し、参照により本明細書に組み込まれる。
Pf=Po×2Zf/(Zo+Zf) (7)
および
δ=(λu/2π)Pf/Bf (8)
ただし、Pfはプローブ・ファイバ120の遠位端124内に結合された超音波圧力振幅、Poはプローブ・ファイバ120上に入射する超音波圧力振幅、ZfおよびZoはそれぞれプローブ・ファイバ120および周囲媒体の音響インピーダンスである。δは超音波結合によってミラー面620が受ける変位振幅、λuはプローブ・ファイバ120内の超音波波長、およびBfはプローブ・ファイバ120の体積弾性率である。したがって、干渉計の信号アームにおいて超音波によって誘起された位相シフトは、近似的に
Φu=2δ×(2π×n/λ)
(9)
ただし、nはプローブ・ファイバ120の屈折率、λは光学波長である。
Claims (10)
- 基準アームと、プローブ・ファイバを含む信号アームとを有する干渉計であって、前記プローブ・ファイバは、その遠位端に反射性コーティングを有し、前記遠位端に最も近い超音波を結合するように構成され、前記干渉計は、レーザ光を受け取り、前記超音波に基づいて2つの出力ビームを生成するように構成される、干渉計と、
前記干渉計に結合され、前記2つの出力ビームに基づいて電気信号を発生するように構成された光検出器と
を備える、超音波圧力センサ。 - 前記超音波が前記遠位端に、
前記プローブ・ファイバの長手方向軸にほぼ沿った方向と、
前記長手方向軸にほぼ垂直な方向と
からなる群から選択される方向から入射する、請求項1に記載の超音波圧力センサ。 - 前記光検出器が、前記2つの出力ビームの強度に比例する2つの電圧信号と、さらに前記強度の差に比例する電圧信号とを発生する平衡型光検出器である、請求項1に記載の超音波圧力センサ。
- 光サーキュレータをさらに備え、前記基準アームは、駆動部がそれに結合された光位相シフタを含み、前記信号アームは集束レンズをさらに含む、請求項1に記載の超音波圧力センサ。
- ローパスフィルタを含み、前記光検出器と前記駆動部を結合し、前記位相シフタによって発生される位相シフトを制御するように構成されたフィードバックループをさらに備える、請求項4に記載の超音波圧力センサ。
- 前記光検出器と前記駆動部を結合し、前記位相シフタによって発生される位相シフトをある範囲の値にわたって掃引させ、前記超音波圧力センサの位相バイアスを求めるために前記電気信号を監視し、その後に前記超音波圧力センサに超音波を感知させるように構成されるコントローラをさらに備える、請求項4に記載の超音波圧力センサ。
- 前記位相シフタが、
電気光学変調器と、
圧電積層体に結合されたミラーと、
圧電性巻枠の周りに位置する基準ファイバに結合された集束レンズと
からなる群から選択される、請求項1に記載の超音波圧力センサ。 - 前記プローブ・ファイバの前記遠位端と前記反射性コーティングの間に置かれた可撓性材料の層をさらに備える、請求項1に記載の超音波圧力センサ。
- 前記プローブ・ファイバと前記可撓性材料とが一致した屈折率を有し、前記プローブ・ファイバは前記超音波の波長の約1/4の厚さを有する、請求項8に記載の超音波圧力センサ。
- 前記プローブ・ファイバが、細長い円筒形の物体の周りに少なくとも1回巻かれた、請求項1に記載の超音波圧力センサ。
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US89198607P | 2007-02-28 | 2007-02-28 | |
US11/927,889 US7810395B2 (en) | 2005-12-22 | 2007-10-30 | Ultrasonic pressure sensor and method of operating the same |
PCT/US2007/087333 WO2008105974A2 (en) | 2007-02-28 | 2007-12-13 | Ultrasonic pressure sensor and method of operating the same |
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JP2010520464A5 JP2010520464A5 (ja) | 2011-01-27 |
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US (1) | US7810395B2 (ja) |
EP (1) | EP2115405A2 (ja) |
JP (1) | JP2010520464A (ja) |
WO (1) | WO2008105974A2 (ja) |
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US20110144502A1 (en) * | 2009-12-15 | 2011-06-16 | Tea Time Partners, L.P. | Imaging guidewire |
CN101852774B (zh) * | 2010-05-14 | 2012-10-24 | 西安金波检测仪器有限责任公司 | 探伤系统及探伤方法 |
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US10672046B2 (en) * | 2012-12-31 | 2020-06-02 | Baker Hughes, A Ge Company, Llc | Systems and methods for non-destructive testing online stores |
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- 2007-12-13 JP JP2009551986A patent/JP2010520464A/ja active Pending
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WO2008105974A2 (en) | 2008-09-04 |
US7810395B2 (en) | 2010-10-12 |
WO2008105974A3 (en) | 2009-01-15 |
EP2115405A2 (en) | 2009-11-11 |
US20080229837A1 (en) | 2008-09-25 |
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