JP7448176B2 - 音波検出装置 - Google Patents
音波検出装置 Download PDFInfo
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- JP7448176B2 JP7448176B2 JP2019088188A JP2019088188A JP7448176B2 JP 7448176 B2 JP7448176 B2 JP 7448176B2 JP 2019088188 A JP2019088188 A JP 2019088188A JP 2019088188 A JP2019088188 A JP 2019088188A JP 7448176 B2 JP7448176 B2 JP 7448176B2
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- 238000001514 detection method Methods 0.000 title claims description 33
- 239000000835 fiber Substances 0.000 claims description 93
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- 239000002033 PVDF binder Substances 0.000 claims description 24
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 23
- 239000010931 gold Substances 0.000 claims description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052737 gold Inorganic materials 0.000 claims description 9
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Images
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Description
ポリウレタンナノファイバーシートを、”Miyamoto et al. Nature Nanotechnology、P.907-913, Vol.12, 2017”の記載に基づき、下記の通り適宜変更して作製した。
PVDFナノファイバーシートも、上記実施例1と同様にエレクトロスピニング装置(Fuence ES-2000)を用いて作製した。
・ナノファイバー特性測定
実施例1及び実施例2で製造したポリウレタン及びPVDFのナノファイバーそれぞれについて、その構造を走査型電子顕微鏡(Hitachi S-4800,FE-SEM)(以下、SEM)で検証した。SEM画像を撮影し、画像処理ソフト(ImageJ)を用いてナノファイバーの直径を算出した。ポリウレタンナノファイバーの直径は500nm,PVDFナノファイバーの直径は400nmであった。
実施例2で製造したPVDFナノファイバーシート(第2繊維層)を実施例1で製造したポリウレタンナノファイバー基板(第1繊維層)の間に挿入し、上記窓枠を用いて挟持し、この構造を3層積層して音波検出装置を形成した。
アコースティック特性の測定は、拡声器をパーソナルコンピュータ(PC)に接続し、音源として用いた。音の周波数及び音圧レベルは、オーディオテストソフトを用いて周波数10Hz~10,000Hz、音圧98dBで制御した。なお、音圧レベルは、音圧レベル測定器を用いて測定した。音波検出装置からの電気的出力信号は、音波検出装置の出力取出領域16に接続した出力電極14を介し、オシロスコープに入力して測定した。測定試験中、測定機器から生じる偽振動を避けるため、重量のある石板で支持された固定枠に音波検出装置を取り付けた。
実施例3に係る音波検出装置を人の胸部上、僧帽弁の位置に取り付けて心音を測定した。心音信号の測定にはNeuropack(日本光電社製 MEB 9402)を用いた。
Claims (4)
- 導電性繊維で構成された第1繊維層と、
複数の前記第1繊維層の間に挿入され、非導電性繊維で構成された第2繊維層と、
を備え、
前記第1繊維層には、出力電極が接続され、前記第2繊維層には、出力電極が接続されておらず、
前記第1繊維層と第2繊維層との層間の距離が1~100μmであり、音波により生じた空気の振動に応じて、前記第1繊維層と第2繊維層との接触、非接触を繰り返す、音波検出装置。 - 前記第1繊維層を構成する導電性繊維が、導電性物質が樹脂繊維表面にコーティングされた繊維である、請求項1に記載の音波検出装置。
- 前記導電性物質が金である、請求項2に記載の音波検出装置。
- 前記第2繊維層を構成する非導電性繊維が、ポリフッ化ビニリデンの繊維である、請求項1から請求項3のいずれか一項に記載の音波検出装置。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003241765A (ja) | 2002-02-21 | 2003-08-29 | Toray Ind Inc | 制振吸音性を有した繊維積層構造体 |
JP2003284697A (ja) | 2002-03-29 | 2003-10-07 | Yamaguchi Prefecture | 生体信号計測センサーとその装置 |
JP2015109431A (ja) | 2013-10-23 | 2015-06-11 | 株式会社Kri | 圧電ポリマー膜、アクチュエータ、感圧センサ及びそれを用いたデバイス |
JP2017201487A (ja) | 2016-05-06 | 2017-11-09 | 帝人株式会社 | カバリング糸状圧電素子 |
JP2018133368A (ja) | 2017-02-13 | 2018-08-23 | 株式会社Kri | 圧電ポリマー膜及びその製造方法並びに感圧センサ、アクチュエータ及びインターフェースデバイス |
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JPS5431825B2 (ja) * | 1973-08-08 | 1979-10-09 | ||
US5438553A (en) * | 1983-08-22 | 1995-08-01 | Raytheon Company | Transducer |
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- 2019-05-08 JP JP2019088188A patent/JP7448176B2/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003241765A (ja) | 2002-02-21 | 2003-08-29 | Toray Ind Inc | 制振吸音性を有した繊維積層構造体 |
JP2003284697A (ja) | 2002-03-29 | 2003-10-07 | Yamaguchi Prefecture | 生体信号計測センサーとその装置 |
JP2015109431A (ja) | 2013-10-23 | 2015-06-11 | 株式会社Kri | 圧電ポリマー膜、アクチュエータ、感圧センサ及びそれを用いたデバイス |
JP2017201487A (ja) | 2016-05-06 | 2017-11-09 | 帝人株式会社 | カバリング糸状圧電素子 |
JP2018133368A (ja) | 2017-02-13 | 2018-08-23 | 株式会社Kri | 圧電ポリマー膜及びその製造方法並びに感圧センサ、アクチュエータ及びインターフェースデバイス |
Non-Patent Citations (3)
Title |
---|
"A new triboelectric auditory sensor for social robotics and hearing aids",[online],2018年08月09日,<URL:https://techxplore.com/news/2018-08-triboelectric-auditory-sensor-social-robotics.html>,[令和5年8月30日検索] |
Hao-Yang MI,"Triboelectric Nanogenerators Made of Porous Polyamide Nanofiber Mats and Polyimide Aerogel Film: Output Optimization and Performance in Circuits",ACS Applied Materials & Interfaces,2018年08月16日,Vol.10, No.36,p.30596-30606 |
Xing FAN,"Ultrathin, Rollable, Paper-Based Triboelectric Nanogenerator for Acoustic Energy Harvesting and Self-Powered Sound Recording",ACS Nano,Vol.9, No.4,2015年04月03日,p.4236-4243 |
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