JPS5770404A - Capacitance detecting circuit - Google Patents

Capacitance detecting circuit

Info

Publication number
JPS5770404A
JPS5770404A JP14720180A JP14720180A JPS5770404A JP S5770404 A JPS5770404 A JP S5770404A JP 14720180 A JP14720180 A JP 14720180A JP 14720180 A JP14720180 A JP 14720180A JP S5770404 A JPS5770404 A JP S5770404A
Authority
JP
Japan
Prior art keywords
voltage
sensor
comparator
output
capacity
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
JP14720180A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0141240B2 (no
Inventor
Toshimine Ide
Takeshi Shimamoto
Yoshiaki Igarashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14720180A priority Critical patent/JPS5770404A/ja
Priority to US06/312,846 priority patent/US4404481A/en
Publication of JPS5770404A publication Critical patent/JPS5770404A/ja
Publication of JPH0141240B2 publication Critical patent/JPH0141240B2/ja
Granted 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
    • G01L9/0072—Transmitting or indicating the displacement of flexible diaphragms using variations in 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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Technology Law (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
JP14720180A 1980-10-20 1980-10-20 Capacitance detecting circuit Granted JPS5770404A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14720180A JPS5770404A (en) 1980-10-20 1980-10-20 Capacitance detecting circuit
US06/312,846 US4404481A (en) 1980-10-20 1981-10-19 Capacitance to voltage conversion apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14720180A JPS5770404A (en) 1980-10-20 1980-10-20 Capacitance detecting circuit

Publications (2)

Publication Number Publication Date
JPS5770404A true JPS5770404A (en) 1982-04-30
JPH0141240B2 JPH0141240B2 (no) 1989-09-04

Family

ID=15424837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14720180A Granted JPS5770404A (en) 1980-10-20 1980-10-20 Capacitance detecting circuit

Country Status (1)

Country Link
JP (1) JPS5770404A (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910014U (ja) * 1982-07-12 1984-01-21 横河電機株式会社 容量式変換器
JPS59142418A (ja) * 1983-02-02 1984-08-15 Matsushita Electric Ind Co Ltd 物理量検出装置
JP2009174978A (ja) * 2008-01-24 2009-08-06 Fujikura Ltd 静電容量型センサ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910014U (ja) * 1982-07-12 1984-01-21 横河電機株式会社 容量式変換器
JPH0122085Y2 (no) * 1982-07-12 1989-06-29
JPS59142418A (ja) * 1983-02-02 1984-08-15 Matsushita Electric Ind Co Ltd 物理量検出装置
JP2009174978A (ja) * 2008-01-24 2009-08-06 Fujikura Ltd 静電容量型センサ

Also Published As

Publication number Publication date
JPH0141240B2 (no) 1989-09-04

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