JPS6027076B2 - 静電容量形送信器 - Google Patents

静電容量形送信器

Info

Publication number
JPS6027076B2
JPS6027076B2 JP52144912A JP14491277A JPS6027076B2 JP S6027076 B2 JPS6027076 B2 JP S6027076B2 JP 52144912 A JP52144912 A JP 52144912A JP 14491277 A JP14491277 A JP 14491277A JP S6027076 B2 JPS6027076 B2 JP S6027076B2
Authority
JP
Japan
Prior art keywords
circuit
capacitor
current
voltage
adjustment
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.)
Expired
Application number
JP52144912A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5370853A (en
Inventor
ジエ−ムス・ウ−・ツエン・ツエン
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.)
Robertshaw Controls Co
Original Assignee
Robertshaw Controls Co
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 Robertshaw Controls Co filed Critical Robertshaw Controls Co
Publication of JPS5370853A publication Critical patent/JPS5370853A/ja
Publication of JPS6027076B2 publication Critical patent/JPS6027076B2/ja
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measuring Fluid Pressure (AREA)
JP52144912A 1976-12-03 1977-12-02 静電容量形送信器 Expired JPS6027076B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/747,403 US4145619A (en) 1976-12-03 1976-12-03 Two wire capacitance transmitter
US747403 2000-12-23

Publications (2)

Publication Number Publication Date
JPS5370853A JPS5370853A (en) 1978-06-23
JPS6027076B2 true JPS6027076B2 (ja) 1985-06-27

Family

ID=25004913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52144912A Expired JPS6027076B2 (ja) 1976-12-03 1977-12-02 静電容量形送信器

Country Status (5)

Country Link
US (1) US4145619A (enExample)
JP (1) JPS6027076B2 (enExample)
DE (1) DE2753884A1 (enExample)
FR (1) FR2373038A1 (enExample)
GB (1) GB1561947A (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT367211B (de) * 1979-08-29 1982-06-11 List Hans Kapazitiver messwandler
US4387601A (en) * 1980-07-01 1983-06-14 Hokushin Electric Works, Ltd. Capacitance type displacement conversion device
SE436936B (sv) * 1981-01-29 1985-01-28 Asea Ab Integrerad kapacitiv givare
US4525792A (en) * 1982-03-29 1985-06-25 Smiths Industries Public Limited Company Unidirectional capacitive fluid-gauging systems
US5083091A (en) * 1986-04-23 1992-01-21 Rosemount, Inc. Charged balanced feedback measurement circuit
US4791352A (en) * 1986-07-17 1988-12-13 Rosemount Inc. Transmitter with vernier measurement
US4783659A (en) * 1986-08-22 1988-11-08 Rosemount Inc. Analog transducer circuit with digital control
US4748852A (en) * 1986-10-10 1988-06-07 Rosemount Inc. Transmitter with an improved span adjustment
US5135485A (en) * 1991-02-25 1992-08-04 Louis Cohen Capacitance-type fluid level sensor for i.v. and catheter bags
US5485092A (en) * 1991-08-01 1996-01-16 Fortin; Gabriel Method and device for electrostatically investigating surface and sub-surface structures
US5237285A (en) * 1991-10-18 1993-08-17 Rosemount Inc. Method and apparatus for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter
US5838241A (en) * 1996-12-18 1998-11-17 Robertshaw Controls Company Liquid level transmitter
US6516672B2 (en) 2001-05-21 2003-02-11 Rosemount Inc. Sigma-delta analog to digital converter for capacitive pressure sensor and process transmitter
GB0121418D0 (en) * 2001-09-04 2001-10-24 Smiths Group Plc Capacitance measuring systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482234A (en) * 1965-06-22 1969-12-02 Bendix Corp Signal comparator for minimizing nuisance failure alarms
US3555534A (en) * 1967-03-10 1971-01-12 North American Rockwell Proximity detector with a sensing probe
FR1526273A (fr) * 1967-04-13 1968-05-24 Schlumberger Instrumentation Dispositif pour la mesure des condensateurs électriques
US3543046A (en) * 1969-04-14 1970-11-24 Fisher Governor Co Capacitance-measuring techniques
US3612997A (en) * 1970-02-18 1971-10-12 John Paulkovich Capacitor apparatus including a reference capacitor for controlling the current flow through a capacitance being measured
US3829850A (en) * 1971-12-17 1974-08-13 Tyco Laboratories Inc Proximity detector
US3811051A (en) * 1972-11-03 1974-05-14 Robertshaw Controls Co Capacitance responsive detector system

Also Published As

Publication number Publication date
US4145619A (en) 1979-03-20
FR2373038A1 (fr) 1978-06-30
GB1561947A (en) 1980-03-05
DE2753884A1 (de) 1978-06-08
FR2373038B1 (enExample) 1984-03-09
JPS5370853A (en) 1978-06-23

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