JPS56151309A - Capacity type displacement converter - Google Patents

Capacity type displacement converter

Info

Publication number
JPS56151309A
JPS56151309A JP5354380A JP5354380A JPS56151309A JP S56151309 A JPS56151309 A JP S56151309A JP 5354380 A JP5354380 A JP 5354380A JP 5354380 A JP5354380 A JP 5354380A JP S56151309 A JPS56151309 A JP S56151309A
Authority
JP
Japan
Prior art keywords
variable capacity
differential amplifier
resistor
differential
capacity type
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.)
Granted
Application number
JP5354380A
Other languages
Japanese (ja)
Other versions
JPH0128324B2 (en
Inventor
Atsushi Kimura
Hitoshi Akiyama
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric 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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP5354380A priority Critical patent/JPS56151309A/en
Publication of JPS56151309A publication Critical patent/JPS56151309A/en
Publication of JPH0128324B2 publication Critical patent/JPH0128324B2/ja
Granted 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To electrically compensate the nonrectilinear conversion characteristics of a variable capacity type sensor, by using a differential conversion circuit for a conversion circuit which converts the output of variable capacity type sensor to an electric current signal and making feedback of output signal between these differential inputs. CONSTITUTION:Outputs of an AC power source 101 controlled by a differential amplifier 102 is impressed to the variable capacity elements 103 and 104 whose electrostatic capacity is differentially varied. Waves of currents which are proportional to capacities of variable capacity elements 103 and 104 are detected by diodes 105-108, amplified by a differential amplifier 122 as a difference from a reference voltage e0, and value of current passing through between line terminals 128 and 129 is changed. Terminal voltage of a resistor 127 is given to nonreversible input of the differential amplifier 102 through a resistor 134, and a negative feedback as an entire circuit is provided. And terminal voltage of the resistor 127 is given through a potentiometer 135 to the differential amplifier 122 as a positive feedback or a negative feedback, and therefore, nonrectilinear conversion characteristics of the variable capacity elements 103 and 104 are compensated.
JP5354380A 1980-04-25 1980-04-25 Capacity type displacement converter Granted JPS56151309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5354380A JPS56151309A (en) 1980-04-25 1980-04-25 Capacity type displacement converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5354380A JPS56151309A (en) 1980-04-25 1980-04-25 Capacity type displacement converter

Publications (2)

Publication Number Publication Date
JPS56151309A true JPS56151309A (en) 1981-11-24
JPH0128324B2 JPH0128324B2 (en) 1989-06-02

Family

ID=12945708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5354380A Granted JPS56151309A (en) 1980-04-25 1980-04-25 Capacity type displacement converter

Country Status (1)

Country Link
JP (1) JPS56151309A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105120A2 (en) * 1982-09-30 1984-04-11 International Business Machines Corporation Method and apparatus for measuring signals from differential sensors
US4618862A (en) * 1982-06-28 1986-10-21 Fuji Electric Co., Ltd. Mechanical displacement transducer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5273759U (en) * 1975-11-27 1977-06-02
JPS5513749U (en) * 1978-07-13 1980-01-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5273759U (en) * 1975-11-27 1977-06-02
JPS5513749U (en) * 1978-07-13 1980-01-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618862A (en) * 1982-06-28 1986-10-21 Fuji Electric Co., Ltd. Mechanical displacement transducer
EP0105120A2 (en) * 1982-09-30 1984-04-11 International Business Machines Corporation Method and apparatus for measuring signals from differential sensors

Also Published As

Publication number Publication date
JPH0128324B2 (en) 1989-06-02

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