JPS5733365A - Phase meter - Google Patents

Phase meter

Info

Publication number
JPS5733365A
JPS5733365A JP10750980A JP10750980A JPS5733365A JP S5733365 A JPS5733365 A JP S5733365A JP 10750980 A JP10750980 A JP 10750980A JP 10750980 A JP10750980 A JP 10750980A JP S5733365 A JPS5733365 A JP S5733365A
Authority
JP
Japan
Prior art keywords
signal
zero cross
phase difference
time
time lag
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
JP10750980A
Other languages
Japanese (ja)
Inventor
Shigeru Abe
Shoichi Takeda
Masanobu Ito
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 JP10750980A priority Critical patent/JPS5733365A/en
Publication of JPS5733365A publication Critical patent/JPS5733365A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • G01R25/08—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents by counting of standard pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Phase Differences (AREA)

Abstract

PURPOSE:To measure a phase difference with virtually no time lag by using a circuit which digitally measures zero cross time difference at every cycle, and outputs the same after subjecting to the digital to analog conversion. CONSTITUTION:Period signals e1, e2 having the two same frequencies are applied respectively to a zero cross circuit 1 and an FF2, and the square wave e5 having the pulse width proportional to a zero cross time difference is formed. This is applied to a modulated wave generating circuit consisting of an AND gate 4 and a clock generating circuit 7, whereby a signal e8 is obtained. Next, a microprocessor 8 supplied with the signal e8 operates phase differences based on modulation quantity. It is next converted 9 from digital to analog to form a staircaselike signal e10 which is outputted. In this way, the phase difference between the period signals e1, e2 is outputted with a time lag of only the processing time TD. Hence, the phase difference is measured with virtually no time lag.
JP10750980A 1980-08-05 1980-08-05 Phase meter Pending JPS5733365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10750980A JPS5733365A (en) 1980-08-05 1980-08-05 Phase meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10750980A JPS5733365A (en) 1980-08-05 1980-08-05 Phase meter

Publications (1)

Publication Number Publication Date
JPS5733365A true JPS5733365A (en) 1982-02-23

Family

ID=14461003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10750980A Pending JPS5733365A (en) 1980-08-05 1980-08-05 Phase meter

Country Status (1)

Country Link
JP (1) JPS5733365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111722011A (en) * 2019-03-20 2020-09-29 阿自倍尔株式会社 Frequency detection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111722011A (en) * 2019-03-20 2020-09-29 阿自倍尔株式会社 Frequency detection circuit
CN111722011B (en) * 2019-03-20 2023-01-24 阿自倍尔株式会社 Frequency detection circuit

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