JPS57168133A - Pressure wave sensor - Google Patents

Pressure wave sensor

Info

Publication number
JPS57168133A
JPS57168133A JP5322281A JP5322281A JPS57168133A JP S57168133 A JPS57168133 A JP S57168133A JP 5322281 A JP5322281 A JP 5322281A JP 5322281 A JP5322281 A JP 5322281A JP S57168133 A JPS57168133 A JP S57168133A
Authority
JP
Japan
Prior art keywords
case
film
pressure wave
piezo electric
high molecule
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.)
Pending
Application number
JP5322281A
Other languages
Japanese (ja)
Inventor
Hideki Ishida
Shiyou Tonegawa
Yasuhiro Mizuno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RIKOO TOKEI KK
Ricoh Elemex Corp
Original Assignee
RIKOO TOKEI KK
Ricoh Elemex Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RIKOO TOKEI KK, Ricoh Elemex Corp filed Critical RIKOO TOKEI KK
Priority to JP5322281A priority Critical patent/JPS57168133A/en
Publication of JPS57168133A publication Critical patent/JPS57168133A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/008—Transmitting or indicating the displacement of flexible diaphragms using piezoelectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

PURPOSE:To raise transmission efficiency of pressure wave by closing both ends of a case with a flexible film for detecting pressure wave and a high molecule piezo electric film that converts pressure wave into electric signal and filling the chamber thus formed with liquid for transmitting pressure wave. CONSTITUTION:The central part of a case 10 made of synthetic resin is pierced through in its center to form a hole with openings on both ends. The diameter of the bottom opening 10a is made large and that of the top opening 10b is made small. The hole is shaped a truncated cone. The bottom opening 10a is closed by a flexible film 11, and, further, at the end of the top opening of the case 10 a high molecule piezo electric film 12 is laminated to close the top opening 10b of the case 10. The laminated high molecule piezo electric film 12 is held between a lid member 13 that covers the top of the case 10 and the case 10. The chamber 14 formed by the flixible film 11 and the film 12 is filled with liquid 15 that is viscous and has extremely small compressiblility. The liquid 15 transmits pulsating pressure with high efficiency to the high molecule piezo electric film 12.
JP5322281A 1981-04-10 1981-04-10 Pressure wave sensor Pending JPS57168133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5322281A JPS57168133A (en) 1981-04-10 1981-04-10 Pressure wave sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5322281A JPS57168133A (en) 1981-04-10 1981-04-10 Pressure wave sensor

Publications (1)

Publication Number Publication Date
JPS57168133A true JPS57168133A (en) 1982-10-16

Family

ID=12936790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5322281A Pending JPS57168133A (en) 1981-04-10 1981-04-10 Pressure wave sensor

Country Status (1)

Country Link
JP (1) JPS57168133A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01117309U (en) * 1988-01-28 1989-08-08
JPH01117303U (en) * 1988-01-29 1989-08-08
JPH05502531A (en) * 1989-12-22 1993-04-28 ブリテイッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー neural network
FR2690741A1 (en) * 1992-04-29 1993-11-05 Chronotec Pressure measuring device, in particular for an infusion set.
US7191659B2 (en) * 2003-12-18 2007-03-20 Denso Corporation Sealed diaphragm pressure sensor
JP2012508387A (en) * 2008-11-11 2012-04-05 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Pressure sensor
CN105249950A (en) * 2015-10-29 2016-01-20 杨松 Pressure signal acquisition device and human body physiology signal acquisition pad body
JP2017196309A (en) * 2016-04-28 2017-11-02 オムロンヘルスケア株式会社 Pressure pulse wave sensor, pulse wave detecting device, and bioinformation measuring device
KR20170141242A (en) * 2015-05-06 2017-12-22 힐비 코퍼레이션 Sensor unit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01117309U (en) * 1988-01-28 1989-08-08
JPH01117303U (en) * 1988-01-29 1989-08-08
JPH05502531A (en) * 1989-12-22 1993-04-28 ブリテイッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー neural network
FR2690741A1 (en) * 1992-04-29 1993-11-05 Chronotec Pressure measuring device, in particular for an infusion set.
US7191659B2 (en) * 2003-12-18 2007-03-20 Denso Corporation Sealed diaphragm pressure sensor
JP2012508387A (en) * 2008-11-11 2012-04-05 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Pressure sensor
US8931348B2 (en) 2008-11-11 2015-01-13 Robert Bosch Gmbh Pressure sensor
KR20170141242A (en) * 2015-05-06 2017-12-22 힐비 코퍼레이션 Sensor unit
JP2018514315A (en) * 2015-05-06 2018-06-07 ヒールビー コーポレイション Sensor unit
CN105249950A (en) * 2015-10-29 2016-01-20 杨松 Pressure signal acquisition device and human body physiology signal acquisition pad body
JP2017196309A (en) * 2016-04-28 2017-11-02 オムロンヘルスケア株式会社 Pressure pulse wave sensor, pulse wave detecting device, and bioinformation measuring device
WO2017188093A1 (en) * 2016-04-28 2017-11-02 オムロンヘルスケア株式会社 Pressure pulse wave sensor, pulse wave detection device, and biological information measurement device

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