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JPS568562A - Measuring device for reactance change - Google Patents

Measuring device for reactance change

Info

Publication number
JPS568562A
JPS568562A JP8261279A JP8261279A JPS568562A JP S568562 A JPS568562 A JP S568562A JP 8261279 A JP8261279 A JP 8261279A JP 8261279 A JP8261279 A JP 8261279A JP S568562 A JPS568562 A JP S568562A
Authority
JP
Japan
Prior art keywords
circuit
resistance
constant
current
control
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
JP8261279A
Other languages
Japanese (ja)
Inventor
Seishiro Aitsu
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8261279A priority Critical patent/JPS568562A/en
Publication of JPS568562A publication Critical patent/JPS568562A/en
Pending legal-status Critical Current

Links

Landscapes

  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To increase the measuring accuracy by giving the control to the serial variable resistance so that the DC resistance of the circuit may be constant at all times and thus preventing the change of the DC resistance.
CONSTITUTION: Detecting coil 20 is connected in series to variable resistance element 21, current detecting element 22, DC power source 23, AC power source 24 and the primary winding circuit of output transformer 25. Element 22 is connected to control circuit 26, and circuit 26 gives control to the value of element 21 so that the whole DC resistance component of the circuit may be constant at all times. Thus AC and DC voltage Eac and Edc are piled on each other to be flowed. Then the DC current is detected via element 22 and circuit 26 each, and element 21 is controlled so that the DC current, i.e., the full resistance component becomes constant. In such constitution, the DC resistance component which will be affected by the temperature and other factors can be kept constant at all times, thus increasing the measuring accuracy.
COPYRIGHT: (C)1981,JPO&Japio
JP8261279A 1979-07-02 1979-07-02 Measuring device for reactance change Pending JPS568562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8261279A JPS568562A (en) 1979-07-02 1979-07-02 Measuring device for reactance change

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8261279A JPS568562A (en) 1979-07-02 1979-07-02 Measuring device for reactance change

Publications (1)

Publication Number Publication Date
JPS568562A true JPS568562A (en) 1981-01-28

Family

ID=13779289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8261279A Pending JPS568562A (en) 1979-07-02 1979-07-02 Measuring device for reactance change

Country Status (1)

Country Link
JP (1) JPS568562A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59118018A (en) * 1982-12-23 1984-07-07 亘　重信 Mushroom culture medium
JPH02273124A (en) * 1983-08-04 1990-11-07 Yojigen Soshiki Noukousanshiya:Kk Culture medium for mushroom
US5334932A (en) * 1991-02-22 1994-08-02 Vickers Incorporated Temperature compensated electrical sensor system for measuring ferrous particles in a fluid using a series resonant oscillator and microprocessor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59118018A (en) * 1982-12-23 1984-07-07 亘　重信 Mushroom culture medium
JPH02273124A (en) * 1983-08-04 1990-11-07 Yojigen Soshiki Noukousanshiya:Kk Culture medium for mushroom
US5334932A (en) * 1991-02-22 1994-08-02 Vickers Incorporated Temperature compensated electrical sensor system for measuring ferrous particles in a fluid using a series resonant oscillator and microprocessor

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