JPS57171212A - Capacity type converter - Google Patents

Capacity type converter

Info

Publication number
JPS57171212A
JPS57171212A JP5598081A JP5598081A JPS57171212A JP S57171212 A JPS57171212 A JP S57171212A JP 5598081 A JP5598081 A JP 5598081A JP 5598081 A JP5598081 A JP 5598081A JP S57171212 A JPS57171212 A JP S57171212A
Authority
JP
Japan
Prior art keywords
compensation
pulse width
voltage
signal
adder
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
JP5598081A
Other languages
Japanese (ja)
Other versions
JPS6352686B2 (en
Inventor
Terutaka Hirata
Toshiaki Kawakami
Masahiro Ogawa
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
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP5598081A priority Critical patent/JPS57171212A/en
Publication of JPS57171212A publication Critical patent/JPS57171212A/en
Publication of JPS6352686B2 publication Critical patent/JPS6352686B2/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
    • G01D5/241—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 by relative movement of capacitor electrodes
    • G01D5/2417—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 by relative movement of capacitor electrodes by varying separation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To enable correcting of a non-rectilinearity by means of a simple constitution, by constituting a device such that a pulse width signal for compensation is generated, an adder, a substractor, and a factor device are mounted, and a given computation is made using the pulse width signal for compensation and an output voltage. CONSTITUTION:A pulse width signal PW3 for compensation, having a specified pulse width ts, is obtained at a period T, corresponding to a sum of variable capacitors C1 and C2, via a flip flop FF1, an one shot circuit MM, and a comparator CP. A switch SW1 is driven by the signal W3, and after an output KV0 of a coefficient multiplier KC is set to ON or OFF, it is applied to a filter circuit PCf to output a voltage Vf. The compensation voltage Vf is applied to an adder AD2 and is added to a signal voltage V3, and this causes an output voltage Vc of the adder AD2 to accurately proportion a displacement amount x of a moving electrode 10 without being effected by a stray capacity Cs. The adjustment of a factor K of the factor device KC permits the control of a rectilinear property. This permits the correction of non-rectilinearity by means of a simple constitution.
JP5598081A 1981-04-14 1981-04-14 Capacity type converter Granted JPS57171212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5598081A JPS57171212A (en) 1981-04-14 1981-04-14 Capacity type converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5598081A JPS57171212A (en) 1981-04-14 1981-04-14 Capacity type converter

Publications (2)

Publication Number Publication Date
JPS57171212A true JPS57171212A (en) 1982-10-21
JPS6352686B2 JPS6352686B2 (en) 1988-10-19

Family

ID=13014217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5598081A Granted JPS57171212A (en) 1981-04-14 1981-04-14 Capacity type converter

Country Status (1)

Country Link
JP (1) JPS57171212A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62267636A (en) * 1986-05-05 1987-11-20 テキサス　インスツルメンツ　インコ−ポレイテツド Sensor
EP0250028A2 (en) * 1986-06-18 1987-12-23 Philips Patentverwaltung GmbH Circuit device for compensation of temperature dependent and temperature independent drifts of a capacitive sensor
KR101011611B1 (en) 2006-06-30 2011-01-27 센쩬 한스 레이저 테크놀로지 컴퍼니 리미티드 A Controlling Method for Capacitive Sensors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62267636A (en) * 1986-05-05 1987-11-20 テキサス　インスツルメンツ　インコ−ポレイテツド Sensor
EP0250028A2 (en) * 1986-06-18 1987-12-23 Philips Patentverwaltung GmbH Circuit device for compensation of temperature dependent and temperature independent drifts of a capacitive sensor
KR101011611B1 (en) 2006-06-30 2011-01-27 센쩬 한스 레이저 테크놀로지 컴퍼니 리미티드 A Controlling Method for Capacitive Sensors
US8125227B2 (en) 2006-06-30 2012-02-28 Shenzhen Han's Laser Technology Co., Limited Controlling method for capacitive sensors

Also Published As

Publication number Publication date
JPS6352686B2 (en) 1988-10-19

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