JPS5670466A - Detector for change in impedance - Google Patents
Detector for change in impedanceInfo
- 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
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
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)
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 |
-
1979
- 1979-11-13 JP JP14670079A patent/JPS5670466A/en active Granted
Cited By (3)
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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