JPH0166076U - - Google Patents

Info

Publication number
JPH0166076U
JPH0166076U JP8497588U JP8497588U JPH0166076U JP H0166076 U JPH0166076 U JP H0166076U JP 8497588 U JP8497588 U JP 8497588U JP 8497588 U JP8497588 U JP 8497588U JP H0166076 U JPH0166076 U JP H0166076U
Authority
JP
Japan
Prior art keywords
capacitor
variable
current
reference capacitor
discharging
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
JP8497588U
Other languages
English (en)
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 filed Critical
Publication of JPH0166076U publication Critical patent/JPH0166076U/ja
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
    • G01L9/12—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 by making use of variations in capacitance, i.e. electric circuits therefor

Description

【図面の簡単な説明】
第１図は本考案の圧力検出変換器回路の一実施
例のブロツク図、第２Ａ乃至第２Ｄ図は第１図の
回路の各点に発生する信号の波形図、第３Ａ乃至
第３Ｄ図は第１図に示す回路の詳細回路図である
。第４図は第３Ａ〜第３Ｄ図の組合せを示す図で
ある。 ２……定電流源、４……スイツチ、６，８……
比較・放電回路、１４……フリツプ・フロツプ、
１６……デユーテイサイクル検出回路、２４……
バツフア回路。

Claims (1)

  1. 【実用新案登録請求の範囲】 可変容量コンデンサの容量値に逆比例する電圧
    を発生する装置であつて、 基準コンデンサ、 該基準コンデンサ、及び前記可変容量コンデン
    サに結合されて該基準コンデンサ及び可変容量コ
    ンデンサを交互に充、放電する第１の手段、を具
    え、 前記第１の手段は、 前記基準コンデンサ及び可変容量コンデンサに
    交互に電流を導く第３の手段、 該第３の手段及び前記基準コンデンサに結合さ
    れて該基準コンデンサの電圧が所定値に達したと
    きに前記第３の手段の状態を変更し、これによつ
    て前記基準コンデンサを放電させかつ前記電流を
    前記可変容量コンデンサに導かせる第１の比較手
    段、 前記第３の手段及び前記可変容量コンデンサに
    結合されて該可変容量コンデンサの電圧が前記帰
    還電圧に達したときに前記第３の手段の状態を変
    更しこれによつて前記可変容量コンデンサを放電
    させかつ前記電流を前記基準コンデンサに導かせ
    る第２の比較手段、 前記第１手段に結合され、前記可変容量コンデ
    ンサを放電させる帰還電圧を発生し、該帰還電圧
    は、前記可変容量コンデンサの容量値に逆比例す
    る大きさに達する第２の手段、を具え、 前記第２の手段は、 電荷蓄積手段、 前記基準コンデンサの充電期間中に前記電荷蓄
    積手段内に電流を導きかつ前記可変容量コンデン
    サの充電期間中に前記電荷蓄積手段から電流を引
    出す第４の手段を具えたことを特徴とする圧力検
    出変換回路。
JP8497588U 1979-04-19 1988-06-27 Pending JPH0166076U (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/031,884 US4250452A (en) 1979-04-19 1979-04-19 Pressure sensitive transducer circuits

Publications (1)

Publication Number Publication Date
JPH0166076U true JPH0166076U (ja) 1989-04-27

Family

ID=21861911

Family Applications (2)

Application Number Title Priority Date Filing Date
JP5157680A Pending JPS55142251A (en) 1979-04-19 1980-04-18 Pressure detection converter circuit
JP8497588U Pending JPH0166076U (ja) 1979-04-19 1988-06-27

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP5157680A Pending JPS55142251A (en) 1979-04-19 1980-04-18 Pressure detection converter circuit

Country Status (4)

Country Link
US (1) US4250452A (ja)
JP (2) JPS55142251A (ja)
DE (1) DE3014657C2 (ja)
FR (1) FR2454617A1 (ja)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392382A (en) * 1981-03-09 1983-07-12 Motorola Inc. Linearized electronic capacitive pressure transducer
US4398426A (en) * 1981-07-02 1983-08-16 Kavlico Corporation Linear capacitive pressure transducer system
US4449409A (en) * 1981-07-13 1984-05-22 The Bendix Corporation Pressure measurement system with a constant settlement time
US4550611A (en) * 1984-01-05 1985-11-05 Motorola, Inc. Electronic pressure transducer
US4656871A (en) * 1985-07-16 1987-04-14 Motorola, Inc. Capacitor sensor and method
JPS62211533A (ja) * 1986-03-13 1987-09-17 Yokogawa Electric Corp 容量式変換装置
US4831325A (en) * 1987-04-01 1989-05-16 General Signal Corporation Capacitance measuring circuit
US5296750A (en) * 1992-10-02 1994-03-22 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Measurand transient signal suppressor
US5535752A (en) * 1995-02-27 1996-07-16 Medtronic, Inc. Implantable capacitive absolute pressure and temperature monitor system
US5759870A (en) * 1995-08-28 1998-06-02 Bei Electronics, Inc. Method of making a surface micro-machined silicon pressure sensor
US6171252B1 (en) * 1999-04-29 2001-01-09 Medtronic, Inc. Pressure sensor with increased sensitivity for use with an implantable medical device
US8836349B2 (en) 2012-08-15 2014-09-16 Robert Bosch Gmbh Capacitive sensor
US9869599B2 (en) * 2014-09-30 2018-01-16 Rosemount Inc. High-temperature pressure sensing
US9897504B2 (en) * 2015-04-20 2018-02-20 Infineon Technologies Ag System and method for a MEMS sensor
JP2020020620A (ja) * 2018-07-31 2020-02-06 デクセリアルズ株式会社 センサ装置、センサモジュール及び感圧検出方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB939660A (en) * 1959-11-20 1963-10-16 Carl Gustav Hansson Apparatus and method for measuring capacitance
US3384789A (en) * 1964-10-19 1968-05-21 James M Morita Approach switch apparatus
US3462692A (en) * 1967-03-27 1969-08-19 Bliss Co Pedestrian detection system
US3811051A (en) * 1972-11-03 1974-05-14 Robertshaw Controls Co Capacitance responsive detector system
US3975719A (en) * 1975-01-20 1976-08-17 Rosemount Inc. Transducer for converting a varying reactance signal to a DC current signal
US4054833A (en) * 1976-06-11 1977-10-18 Setra Systems, Inc. Capacitance measuring system
AT359599B (de) * 1977-02-03 1980-11-25 Elin Union Ag Elektronische kapazitaetsmesseinrichtung

Also Published As

Publication number Publication date
FR2454617A1 (fr) 1980-11-14
DE3014657C2 (de) 1985-01-31
US4250452A (en) 1981-02-10
FR2454617B1 (ja) 1983-12-09
JPS55142251A (en) 1980-11-06
DE3014657A1 (de) 1980-11-06

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