JPS56129867A - Measuring circuit - Google Patents

Measuring circuit

Info

Publication number
JPS56129867A
JPS56129867A JP3374080A JP3374080A JPS56129867A JP S56129867 A JPS56129867 A JP S56129867A JP 3374080 A JP3374080 A JP 3374080A JP 3374080 A JP3374080 A JP 3374080A JP S56129867 A JPS56129867 A JP S56129867A
Authority
JP
Japan
Prior art keywords
level
power
expanded
indication
tidal current
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
JP3374080A
Other languages
Japanese (ja)
Inventor
Shigeto Oyabu
Hideo Takenaka
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 Engineering Corp
Toshiba Corp
Original Assignee
Toshiba Engineering Corp
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 Engineering Corp, Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Engineering Corp
Priority to JP3374080A priority Critical patent/JPS56129867A/en
Publication of JPS56129867A publication Critical patent/JPS56129867A/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
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To accomplish a power indication with limited errors regardless of the volume of tidal current by a digital indication of power level with expanded input AC level according to the lowering detected in the AC level to be measured. CONSTITUTION:When the power transmission tidal current is below a specified value, a drop in the output voltage of an arithmetric amplifier 8 makes negative the sum with a negative voltage from a constant current source 22, the output of an arithmetric amplifier composing a comparator turns to a higher level. This switches on or off transistors 18 and 19 to change-over electronic switches 13 and 12. Therefore, a relay switch 21a works with the excitation of a relay 20 thereby preventing any expansion of the output from an amplifier 8 even when the AC level to be measured from the secondary winding of an auxiliary rectifier 7 becomes a pseudo AC level expanded 10 times. As a result, the power is expanded at a specified rate on an indicator with an A/D converter 5 or the like and digitally indicated after adjusted in the decimal point position with a relay contact 21b. This indication can be made with limited errors even under a less tidal current as is done under a larger one.
JP3374080A 1980-03-17 1980-03-17 Measuring circuit Pending JPS56129867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3374080A JPS56129867A (en) 1980-03-17 1980-03-17 Measuring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3374080A JPS56129867A (en) 1980-03-17 1980-03-17 Measuring circuit

Publications (1)

Publication Number Publication Date
JPS56129867A true JPS56129867A (en) 1981-10-12

Family

ID=12394801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3374080A Pending JPS56129867A (en) 1980-03-17 1980-03-17 Measuring circuit

Country Status (1)

Country Link
JP (1) JPS56129867A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63171666A (en) * 1986-12-29 1988-07-15 Dainippon Printing Co Ltd Flat plate coater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63171666A (en) * 1986-12-29 1988-07-15 Dainippon Printing Co Ltd Flat plate coater

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