JPS56143938A - Pressure transmitter - Google Patents

Pressure transmitter

Info

Publication number
JPS56143938A
JPS56143938A JP4674680A JP4674680A JPS56143938A JP S56143938 A JPS56143938 A JP S56143938A JP 4674680 A JP4674680 A JP 4674680A JP 4674680 A JP4674680 A JP 4674680A JP S56143938 A JPS56143938 A JP S56143938A
Authority
JP
Japan
Prior art keywords
capacitor
capacity capacitor
capacity
pressure
fixed
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
JP4674680A
Other languages
Japanese (ja)
Other versions
JPS6352685B2 (en
Inventor
Atsushi Kimura
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 JP4674680A priority Critical patent/JPS56143938A/en
Publication of JPS56143938A publication Critical patent/JPS56143938A/en
Publication of JPS6352685B2 publication Critical patent/JPS6352685B2/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

Abstract

PURPOSE:To obtain the output electric signal proportional to pressure with good accuracy by adding a fixed capacity capacitor which does not cause any change in electrostatic capacity according to the displacement of a pressure receiving element in parallel to a variable capacity capacitor thereby constituting a variable capacity part. CONSTITUTION:A variable capacity capacitor is formed by a stationary electrode 16 and a moving electrode 14, and an additional capacity capacitor is formed by a stationary electrode 17 and a metallic ring 12. A variable capacity part is constituted by these two parallel connected capacitors. Also, a fixed capacity capacitor for comparison is formed by a stationary electrode 18 and the metallic ring 12 and a fixed capacity part is constituted by this capacitor. With such constitution, when pressure is applied upon a diaphragm 22, this pressure is exerted upon a leaf spring 13 via internally sealed fluid, thereby causing this to displace. As a result, the capacity of the variable capacity capacitor changes but the capacities of the additional fixed capacity capacitor and the fixed capacity capacitor for comparison do not change.
JP4674680A 1980-04-11 1980-04-11 Pressure transmitter Granted JPS56143938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4674680A JPS56143938A (en) 1980-04-11 1980-04-11 Pressure transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4674680A JPS56143938A (en) 1980-04-11 1980-04-11 Pressure transmitter

Publications (2)

Publication Number Publication Date
JPS56143938A true JPS56143938A (en) 1981-11-10
JPS6352685B2 JPS6352685B2 (en) 1988-10-19

Family

ID=12755892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4674680A Granted JPS56143938A (en) 1980-04-11 1980-04-11 Pressure transmitter

Country Status (1)

Country Link
JP (1) JPS56143938A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127847U (en) * 1976-03-26 1977-09-29
JPS5326135A (en) * 1976-08-24 1978-03-10 Ricoh Co Ltd Developing device for electrostatic latent image

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52127847U (en) * 1976-03-26 1977-09-29
JPS5326135A (en) * 1976-08-24 1978-03-10 Ricoh Co Ltd Developing device for electrostatic latent image

Also Published As

Publication number Publication date
JPS6352685B2 (en) 1988-10-19

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