JPS57171271A - Measuring device for quantity of electricity - Google Patents

Measuring device for quantity of electricity

Info

Publication number
JPS57171271A
JPS57171271A JP56056849A JP5684981A JPS57171271A JP S57171271 A JPS57171271 A JP S57171271A JP 56056849 A JP56056849 A JP 56056849A JP 5684981 A JP5684981 A JP 5684981A JP S57171271 A JPS57171271 A JP S57171271A
Authority
JP
Japan
Prior art keywords
signal
fsig
optical intensity
optical
intensity signals
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
JP56056849A
Other languages
Japanese (ja)
Inventor
Toshiaki Tsukada
Yoichi Fujii
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
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP56056849A priority Critical patent/JPS57171271A/en
Publication of JPS57171271A publication Critical patent/JPS57171271A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor

Abstract

PURPOSE:To make it possible to execute highly stable measurement of quantity of electricity of a low noise level, by dividing two optical intensity signals by an addition signal of the two optical intensity signals taken out from an optical application sensor. CONSTITUTION:From an optical application sensor 20 in which light from a light source 10 enters, polarizing component in the direction of the optical axis of the electrooptical effect element is given to a light detectors 31 and 32. The detector 31 outputs an optical intensity signal which is expressed by (1+fsig), and the detector 32 outputs an optical intensity signal represented by (1+fsig). An adding device 50 adds up these two optical intensity signals and puts out a signal I. A subtracting device 40 subtracts these two optical intensity signals and puts out a signal Fsig. A dividing device 60 divides the signal Fsig by the signal I and puts out a signal Fsig. Since this division output is free from a term containing noise and loss rate, by measuring a value of the signal fsig, it is possible to execute a stable measurement of quantity of electricity without being affected by noise, etc.
JP56056849A 1981-04-15 1981-04-15 Measuring device for quantity of electricity Pending JPS57171271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56056849A JPS57171271A (en) 1981-04-15 1981-04-15 Measuring device for quantity of electricity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56056849A JPS57171271A (en) 1981-04-15 1981-04-15 Measuring device for quantity of electricity

Publications (1)

Publication Number Publication Date
JPS57171271A true JPS57171271A (en) 1982-10-21

Family

ID=13038860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56056849A Pending JPS57171271A (en) 1981-04-15 1981-04-15 Measuring device for quantity of electricity

Country Status (1)

Country Link
JP (1) JPS57171271A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59218964A (en) * 1983-05-27 1984-12-10 Yokogawa Hokushin Electric Corp Magneto-optics device
JPS60159385U (en) * 1984-03-31 1985-10-23 住友電気工業株式会社 optical power measurement device
US5126661A (en) * 1990-10-18 1992-06-30 At&T Bell Laboratories Optical probing method and apparatus
WO1995002194A1 (en) * 1993-07-07 1995-01-19 Tokin Corporation Electric field sensor
JP2818300B2 (en) * 1993-04-14 1998-10-30 シーメンス アクチエンゲゼルシヤフト Optical AC measurement method with temperature compensation and apparatus for implementing the method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5483461A (en) * 1977-11-23 1979-07-03 Asea Ab Optical measuring device
JPS5629174A (en) * 1979-08-17 1981-03-23 Matsushita Electric Ind Co Ltd Electric current measuring device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5483461A (en) * 1977-11-23 1979-07-03 Asea Ab Optical measuring device
JPS5629174A (en) * 1979-08-17 1981-03-23 Matsushita Electric Ind Co Ltd Electric current measuring device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59218964A (en) * 1983-05-27 1984-12-10 Yokogawa Hokushin Electric Corp Magneto-optics device
JPS60159385U (en) * 1984-03-31 1985-10-23 住友電気工業株式会社 optical power measurement device
US5126661A (en) * 1990-10-18 1992-06-30 At&T Bell Laboratories Optical probing method and apparatus
JP2818300B2 (en) * 1993-04-14 1998-10-30 シーメンス アクチエンゲゼルシヤフト Optical AC measurement method with temperature compensation and apparatus for implementing the method
WO1995002194A1 (en) * 1993-07-07 1995-01-19 Tokin Corporation Electric field sensor
US5781003A (en) * 1993-07-07 1998-07-14 Tokin Corporation Electric field sensor

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