JPS55159109A - Capacity type displacement converter - Google Patents

Capacity type displacement converter

Info

Publication number
JPS55159109A
JPS55159109A JP6782379A JP6782379A JPS55159109A JP S55159109 A JPS55159109 A JP S55159109A JP 6782379 A JP6782379 A JP 6782379A JP 6782379 A JP6782379 A JP 6782379A JP S55159109 A JPS55159109 A JP S55159109A
Authority
JP
Japan
Prior art keywords
displacements
oscillation circuit
output
way
difference
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.)
Pending
Application number
JP6782379A
Other languages
Japanese (ja)
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 JP6782379A priority Critical patent/JPS55159109A/en
Publication of JPS55159109A publication Critical patent/JPS55159109A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the output signal proportional linearly to displacements by applying the negative feedback corresponding to displacement detection signals to an oscillation circuit.
CONSTITUTION: The output of an oscillation circuit 27 is supplied to a capacitor C24 of which capacity changes according to physical displacements and a capacitor C25 which does not respond to the displacements, and the electric signals corresponding to the impedance values of the respective C24, C25 are detected by way of diodes 28, 29. The detection signal with respect to the C24 is negtive-fed back by way of an operational amplifier 41 to maintain the output amplitude of the oscillation circuit 27 constant. In addition, the difference of the signal voltages detected by way of the respective diodes 28, 29 is formed 47 and the voltage corresponding to this difference is negative-fed back to the oscillation circuit 27. This results in that the output of the difference changes linearly according to the displacements.
COPYRIGHT: (C)1980,JPO&Japio
JP6782379A 1979-05-30 1979-05-30 Capacity type displacement converter Pending JPS55159109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6782379A JPS55159109A (en) 1979-05-30 1979-05-30 Capacity type displacement converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6782379A JPS55159109A (en) 1979-05-30 1979-05-30 Capacity type displacement converter

Publications (1)

Publication Number Publication Date
JPS55159109A true JPS55159109A (en) 1980-12-11

Family

ID=13356041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6782379A Pending JPS55159109A (en) 1979-05-30 1979-05-30 Capacity type displacement converter

Country Status (1)

Country Link
JP (1) JPS55159109A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139612A (en) * 1981-02-24 1982-08-28 Yokogawa Hokushin Electric Corp Capacitance type converter
JPS57158533A (en) * 1981-03-16 1982-09-30 Bendix Corp Differential pressure measuring apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57139612A (en) * 1981-02-24 1982-08-28 Yokogawa Hokushin Electric Corp Capacitance type converter
JPH0216450B2 (en) * 1981-02-24 1990-04-17 Yokogawa Electric Corp
JPS57158533A (en) * 1981-03-16 1982-09-30 Bendix Corp Differential pressure measuring apparatus

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