JPS54134680A - Alternating current voltmeter - Google Patents

Alternating current voltmeter

Info

Publication number
JPS54134680A
JPS54134680A JP4295578A JP4295578A JPS54134680A JP S54134680 A JPS54134680 A JP S54134680A JP 4295578 A JP4295578 A JP 4295578A JP 4295578 A JP4295578 A JP 4295578A JP S54134680 A JPS54134680 A JP S54134680A
Authority
JP
Japan
Prior art keywords
circuit
square
gate
input
alternating 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
JP4295578A
Other languages
Japanese (ja)
Inventor
Naoyuki Konishi
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 JP4295578A priority Critical patent/JPS54134680A/en
Publication of JPS54134680A publication Critical patent/JPS54134680A/en
Pending legal-status Critical Current

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  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To obtain effective values or mean values of high response by providing a period counter which measures the time of 1 cycle or several cycles of AC voltage.
CONSTITUTION: The AC input voltage input-matched by an input matching circuit 1 is let to be e. This e is high speed A/D converted by an A/D converter 5 and the result thereof is let to be et. The et passes through a synchronizing detecting circuit 6 and a gate 8 which is opened by the count time T of a period counter 7 and the sum of the square of the instantaneous value is obtained by a square integration circuit 9. After the gate 8 is closed, operation is carried out from the period T and square integration output P by an arithmetic circuit 10. The results of the operation are displayed and outputted to a display circuit 4.
COPYRIGHT: (C)1979,JPO&Japio
JP4295578A 1978-04-11 1978-04-11 Alternating current voltmeter Pending JPS54134680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4295578A JPS54134680A (en) 1978-04-11 1978-04-11 Alternating current voltmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4295578A JPS54134680A (en) 1978-04-11 1978-04-11 Alternating current voltmeter

Publications (1)

Publication Number Publication Date
JPS54134680A true JPS54134680A (en) 1979-10-19

Family

ID=12650435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4295578A Pending JPS54134680A (en) 1978-04-11 1978-04-11 Alternating current voltmeter

Country Status (1)

Country Link
JP (1) JPS54134680A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256866A (en) * 1987-04-15 1988-10-24 Fuji Electric Co Ltd Measurement system for alternating current quantity
JP2014025705A (en) * 2012-07-24 2014-02-06 Mitsubishi Electric Corp Input signal level detector
CN103777057A (en) * 2012-10-17 2014-05-07 天津市电力公司 True-root-mean-square capacitive current tester

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256866A (en) * 1987-04-15 1988-10-24 Fuji Electric Co Ltd Measurement system for alternating current quantity
JP2014025705A (en) * 2012-07-24 2014-02-06 Mitsubishi Electric Corp Input signal level detector
CN103777057A (en) * 2012-10-17 2014-05-07 天津市电力公司 True-root-mean-square capacitive current tester

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