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JPS54123978A - Selection measuring apparatus - Google Patents

Selection measuring apparatus

Info

Publication number
JPS54123978A
JPS54123978A JP3128178A JP3128178A JPS54123978A JP S54123978 A JPS54123978 A JP S54123978A JP 3128178 A JP3128178 A JP 3128178A JP 3128178 A JP3128178 A JP 3128178A JP S54123978 A JPS54123978 A JP S54123978A
Authority
JP
Japan
Prior art keywords
quantities
supplied
measurement
thru
transducer
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
JP3128178A
Other languages
Japanese (ja)
Other versions
JPS641746B2 (en
Inventor
Tsuneo Yano
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP3128178A priority Critical patent/JPS54123978A/en
Publication of JPS54123978A publication Critical patent/JPS54123978A/en
Publication of JPS641746B2 publication Critical patent/JPS641746B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To eliminate the need for any transducer and achieve lower cost and higher reliability by extracting the quantities being measured and performing maximum value detection through insulating transformers in measurement of the quantities of AC electricity.
CONSTITUTION: The quantities of AC electricities being measured 1a thru 1n are extracted with insulating transformers 3a thru 3n and are supplied to a measurement selecting circuit 4, the outputs selected by which are then 90° phase shifted 5 and are detected 6 of zero point, after which they are supplied as clock pulses to a sample holding circuit 7. Hence, the selected outputs are sample held 7 in the position of maximum values of their instantaneous values, thence they are supplied to a data processing unit 9 after having been A/D converted 8. As a result, data measurement is accomplished without using any transducer.
COPYRIGHT: (C)1979,JPO&Japio
JP3128178A 1978-03-17 1978-03-17 Selection measuring apparatus Granted JPS54123978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3128178A JPS54123978A (en) 1978-03-17 1978-03-17 Selection measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3128178A JPS54123978A (en) 1978-03-17 1978-03-17 Selection measuring apparatus

Publications (2)

Publication Number Publication Date
JPS54123978A true JPS54123978A (en) 1979-09-26
JPS641746B2 JPS641746B2 (en) 1989-01-12

Family

ID=12326926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3128178A Granted JPS54123978A (en) 1978-03-17 1978-03-17 Selection measuring apparatus

Country Status (1)

Country Link
JP (1) JPS54123978A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61266963A (en) * 1985-05-21 1986-11-26 Horiba Ltd Rectifying circuit
JPS62162970A (en) * 1986-01-13 1987-07-18 Nippon Denso Co Ltd Output device for alternating current signal varying in amplitude
DE10135924B4 (en) * 2000-07-25 2014-03-13 Mitutoyo Corp. Amplitude detection method and circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61266963A (en) * 1985-05-21 1986-11-26 Horiba Ltd Rectifying circuit
JPS62162970A (en) * 1986-01-13 1987-07-18 Nippon Denso Co Ltd Output device for alternating current signal varying in amplitude
DE10135924B4 (en) * 2000-07-25 2014-03-13 Mitutoyo Corp. Amplitude detection method and circuit

Also Published As

Publication number Publication date
JPS641746B2 (en) 1989-01-12

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