JP7366059B2 - 流体の流れを測定するためのセンサ - Google Patents
流体の流れを測定するためのセンサ Download PDFInfo
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- JP7366059B2 JP7366059B2 JP2020560611A JP2020560611A JP7366059B2 JP 7366059 B2 JP7366059 B2 JP 7366059B2 JP 2020560611 A JP2020560611 A JP 2020560611A JP 2020560611 A JP2020560611 A JP 2020560611A JP 7366059 B2 JP7366059 B2 JP 7366059B2
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- G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
- G01L7/086—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type with optical transmitting or indicating means
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Description
センサの近位端から遠位端まで延びる呼掛け光ガイドであって、センサの遠位端に呼掛け光を送り、センサの遠位端から反射呼掛け光を受け取るように構成された呼掛け光ガイドと、
センサの遠位端に励起光を送るように構成された励起光ガイドであって、励起光が流体を加熱するために供給される励起光ガイドと、
センサの遠位端に配置された少なくとも1つの検出素子であって、呼掛け光を反射して呼掛け光ガイドに沿ってセンサの近位端に向けて戻すための少なくとも2つのエタロンを備え、各エタロンが、それぞれの光路長を有し、呼掛け光ガイドの外部に少なくとも1つの反射面を有する、少なくとも1つの検出素子と
を備え、少なくとも1つの検出素子は、流体と熱接触するように構成され、それによって、少なくとも1つのエタロンの光路長が流体の温度に依存し、反射呼掛け光は、それぞれのエタロンの光路長に依存するインターフェログラムを形成する。
110 光ファイバ
111 光ファイバ
112 光ファイバ
113 光ファイバ
115 毛管、毛管素子
120 被覆
121 被覆
122 被覆
125 膜
130 反射面
131 反射面
132 反射面
135 反射面
140 反射面
141 反射面
142 反射面
145 反射面
150 呼掛け光
155 反射呼掛け光
160 励起光
161 励起光
170 空洞
180 波長依存被覆
200 センサ
205 内側クラッディング、単一モードファイバ
210 2重クラッドファイバ
220 光吸収層
221 被覆
240 硬質接合媒体、エポキシ、硬質ボンド
270 反射面
275 反射面
280 膜
285 反射面
290 反射層
300 センサ
400 流量センサ
401 センサ
500 センサ
600 センサ
700 組合せ温度および圧力センサ、センサ
760 保護被覆
800 センサ
900 センサ
1001 マイクロカテーテル
1020 カテーテルチュービング
1030 ガイドワイヤ
1100 コンソール
1110 処理装置
1120 広帯域光源
1130 ファイバ結合器
1140 検出器
1150 第2の波長分割マルチプレクサ(WDM2)
1160 第1の波長分割マルチプレクサ(WDM)
1170 励起光源
1180 励起光源
1200 コンソール
1210 処理装置
1215 波長掃引レーザ光源
1220 受光器(PR)
1240 光サーキュレータ(CIRC)
1250 2重クラッドファイバ結合器(DCFC)
Claims (25)
- 生理学的環境内の流体の流れを測定するためのセンサであって、
前記センサの近位端から遠位端まで延びる呼掛け光ガイドであって、前記センサの前記遠位端に呼掛け光を送り、前記センサの前記遠位端から反射呼掛け光を受け取るように構成された呼掛け光ガイドと、
前記センサの前記遠位端に励起光を送るように構成された励起光ガイドであって、前記励起光が前記流体を加熱するために供給される励起光ガイドと、
前記センサの前記遠位端に配置された検出素子であって、呼掛け光を反射して前記呼掛け光ガイドに沿って前記センサの前記近位端に向けて戻すための少なくとも2つのエタロンを備え、各エタロンがそれぞれの光路長を有し、少なくとも1つのエタロンが前記呼掛け光ガイドの外部に少なくとも1つの反射面を有する、検出素子と
を備え、
前記検出素子が、前記流体と熱接触するように構成され、それによって、少なくとも1つのエタロンの前記光路長が前記流体の温度に依存し、前記反射呼掛け光が、前記それぞれのエタロンの前記光路長に依存するインターフェログラムを形成し、
前記センサが前記流体の直接的加熱のために前記流体内に励起光を送るように構成される、センサ。 - それぞれのエタロンからの前記インターフェログラムへの相異なる寄与が、インターフェログラムの周波数に基づいて分離可能である、請求項1に記載のセンサ。
- エタロンの前記光路長の変化が、前記インターフェログラムの位相の対応する変化を生み出す、請求項1または2に記載のセンサ。
- 前記エタロンのうちの少なくとも2つが、温度および圧力の別々の測定値を提供するために温度および/または圧力に対するその応答が異なるように構成される、請求項1から3のいずれか一項に記載のセンサ。
- 前記励起光を受け取り、吸収し、前記励起光を吸収することによって生成された熱を前記流体内に伝達するように構成された光吸収性構成要素をさらに備える、請求項1から4のいずれか一項に記載のセンサ。
- 前記センサが医用デバイス内に一体化され、前記光吸収性構成要素が前記医用デバイスの部分である、請求項5に記載のセンサ。
- 前記励起光の波長に応じて、選択的に前記流体内に前記励起光を送り、または前記センサ内の前記励起光を反射するための2色性被覆をさらに備える、請求項1から6のいずれか一項に記載のセンサ。
- 前記励起光ガイドおよび前記呼掛け光ガイドが、前記呼掛け光と前記励起光の両方によって共用される単一の光ガイドを備える、請求項1から7のいずれか一項に記載のセンサ。
- 励起光ガイドが前記呼掛け光ガイドのクラッディングを備える、請求項1から7のいずれか一項に記載のセンサ。
- 前記エタロンのうちの少なくとも1つが、-20から300mmHgの範囲の前記流体の体積圧力の変化に対して実質的に鈍感である、請求項1から9のいずれか一項に記載のセンサ。
- 前記エタロンのうちの少なくとも1つがガス空洞を含む、請求項1から10のいずれか一項に記載のセンサ。
- 前記センサの前記遠位端を閉じる膜を有する毛管であって、前記膜と前記呼掛け光ガイドの前記遠位端との間で前記毛管内に前記ガス空洞を形成する毛管をさらに備える、請求項11に記載のセンサ。
- 前記膜が弾性ポリマーを含む、請求項12に記載のセンサ。
- 1つのエタロンが、前記呼掛け光に対応する第1の波長範囲において低フィネスを与え、前記流体から前記センサに対して入射する超音波を検出するためのハイドロホンとして働くために第2の波長範囲において高フィネスを与える、2色性誘電体被覆を備える、請求項1から13のいずれか一項に記載のセンサ。
- 前記流体による劣化に対して抵抗力のある、前記遠位端における保護被覆をさらに備える、請求項1から14のいずれか一項に記載のセンサ。
- 前記センサが、動物または人間の体内に挿入するためにカテーテルまたはシースデバイス内に組み込まれる、請求項1から15のいずれか一項に記載のセンサ。
- 生理学的環境内の流体の流れを測定するためのシステムであって、
請求項1から16のいずれか一項に記載のセンサと、
前記呼掛け光を生成するための第1の光源と、
前記励起光を生成するための第2の光源と、
前記インターフェログラムからの前記流れを決定するための解析システムと
を備えるシステム。 - 前記第1の光源が広帯域光源を含み、前記解析システムが、前記インターフェログラムを測定するための分光計を含む、請求項17に記載のシステム。
- 前記第1の光源が波長掃引単色光源を含み、前記解析システムが、前記インターフェログラムを測定するための光検出器を含む、請求項17に記載のシステム。
- 励起光が供給される時間間隔の間、かつ/またはその直後に、少なくとも1つのエタロンの前記光路長の変化から流れの時間分解測定値を決定する、請求項17から19のいずれか一項に記載のシステム。
- 前記第2の光源が、前記励起光の強度を変調するように構成される、請求項17から20のいずれか一項に記載のシステム。
- 前記励起光が2つ以上の波長を含み、前記変調が前記波長に依存する、請求項21に記載のシステム。
- 前記第2の光源が、パルス励起光を生成するように構成される、請求項17から22のいずれか一項に記載のシステム。
- 前記解析システムが、励起光パルスの伝達と、少なくとも1つのエタロンの光路長の対応する変化との間の時間差に基づいて前記流れを測定するように構成される、請求項23に記載のシステム。
- 前記流体内の少なくとも1つの発色団による吸収のために前記励起光の少なくとも一部を前記流体内に送るように構成され、前記励起光の吸収の結果として生じる前記流体の温度の変化を測定することによって前記少なくとも1つの発色団の濃度を決定するようにさらに構成される、請求項17から24のいずれか一項に記載のシステム。
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