JPS5670466A - Detector for change in impedance - Google Patents

Detector for change in impedance

Info

Publication number
JPS5670466A
JPS5670466A JP14670079A JP14670079A JPS5670466A JP S5670466 A JPS5670466 A JP S5670466A JP 14670079 A JP14670079 A JP 14670079A JP 14670079 A JP14670079 A JP 14670079A JP S5670466 A JPS5670466 A JP S5670466A
Authority
JP
Japan
Prior art keywords
impedance
voltage
equal
oscillator
elements
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
JP14670079A
Other languages
Japanese (ja)
Other versions
JPH0549946B2 (en
Inventor
Tadashi Azegami
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 JP14670079A priority Critical patent/JPS5670466A/en
Publication of JPS5670466A publication Critical patent/JPS5670466A/en
Publication of JPH0549946B2 publication Critical patent/JPH0549946B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To measure the change in the differential impedance by a simple constitution by forming a bridge circuit of a pair of impedance elements whose impendance is changed differentially and of a current transformer wherein the primary and secondary wirings are equal.
CONSTITUTION: The currents i1 and i2 flowing through the impedance elements 11 and 12 whose impedance Z1, Z2 is changed differentially become equal to other. Moreover, since the elements 11 and 12 are connected with the terminals, different in polarity, of the primary and secondary windings 4a and 4b, having the same number of turns, of the current transformer and form the bridge circuit, the AC voltage generated between terminals 111 and 42, 121 and 43 is equal and turns to be AC voltage e0 from an oscillator 3' satisfying formulas I and II. Therefore, the voltage e at both ends of the winding 4a becomes the voltage proportional to the fluctuation of the impedance satisfying the condition of the formula III, and this voltage is measured by a signal detecting part 5 in a simple constitution wherein a circuit for controlling the current of the oscillator 3', etc. is not required.
COPYRIGHT: (C)1981,JPO&Japio
JP14670079A 1979-11-13 1979-11-13 Detector for change in impedance Granted JPS5670466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14670079A JPS5670466A (en) 1979-11-13 1979-11-13 Detector for change in impedance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14670079A JPS5670466A (en) 1979-11-13 1979-11-13 Detector for change in impedance

Publications (2)

Publication Number Publication Date
JPS5670466A true JPS5670466A (en) 1981-06-12
JPH0549946B2 JPH0549946B2 (en) 1993-07-27

Family

ID=15413570

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14670079A Granted JPS5670466A (en) 1979-11-13 1979-11-13 Detector for change in impedance

Country Status (1)

Country Link
JP (1) JPS5670466A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107707U (en) * 1983-12-26 1985-07-22 東信電気株式会社 angle detector
JP2013024779A (en) * 2011-07-22 2013-02-04 Murata Mach Ltd Magnetic displacement sensor and displacement detection method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107707U (en) * 1983-12-26 1985-07-22 東信電気株式会社 angle detector
JPH059603Y2 (en) * 1983-12-26 1993-03-10
JP2013024779A (en) * 2011-07-22 2013-02-04 Murata Mach Ltd Magnetic displacement sensor and displacement detection method

Also Published As

Publication number Publication date
JPH0549946B2 (en) 1993-07-27

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