JPS5313962A - Frequency detecting method - Google Patents

Frequency detecting method

Info

Publication number
JPS5313962A
JPS5313962A JP8836176A JP8836176A JPS5313962A JP S5313962 A JPS5313962 A JP S5313962A JP 8836176 A JP8836176 A JP 8836176A JP 8836176 A JP8836176 A JP 8836176A JP S5313962 A JPS5313962 A JP S5313962A
Authority
JP
Japan
Prior art keywords
detecting method
frequency detecting
data
twofold
dividing
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
JP8836176A
Other languages
Japanese (ja)
Inventor
Iwao Madori
Junichi Makino
Yoshiteru Miki
Masuo Goto
Terunobu Miyazaki
Kazuo Seo
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8836176A priority Critical patent/JPS5313962A/en
Publication of JPS5313962A publication Critical patent/JPS5313962A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

PURPOSE: To perform frequency detection with high accuracy at high speed in accordance with information extracted from AC input quantity by dividing the addition of the both terminals' data of three points extracted for a fixed period by the twofold of the data of a central point.
COPYRIGHT: (C)1978,JPO&Japio
JP8836176A 1976-07-24 1976-07-24 Frequency detecting method Pending JPS5313962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8836176A JPS5313962A (en) 1976-07-24 1976-07-24 Frequency detecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8836176A JPS5313962A (en) 1976-07-24 1976-07-24 Frequency detecting method

Publications (1)

Publication Number Publication Date
JPS5313962A true JPS5313962A (en) 1978-02-08

Family

ID=13940661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8836176A Pending JPS5313962A (en) 1976-07-24 1976-07-24 Frequency detecting method

Country Status (1)

Country Link
JP (1) JPS5313962A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531940A (en) * 1978-08-29 1980-03-06 Canon Inc Frequency versus voltage conversion system
JPS59104564A (en) * 1982-10-29 1984-06-16 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Digital circuit for measuring instantaneous frequency of signal
JPH01298916A (en) * 1988-05-26 1989-12-01 Meidensha Corp Digital frequency relay

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112166A (en) * 1974-07-22 1976-01-30 Tokyo Electric Power Co SHUHASUKEN SHUTSUHOSHIKI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112166A (en) * 1974-07-22 1976-01-30 Tokyo Electric Power Co SHUHASUKEN SHUTSUHOSHIKI

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5531940A (en) * 1978-08-29 1980-03-06 Canon Inc Frequency versus voltage conversion system
JPS59104564A (en) * 1982-10-29 1984-06-16 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Digital circuit for measuring instantaneous frequency of signal
JPH01298916A (en) * 1988-05-26 1989-12-01 Meidensha Corp Digital frequency relay

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