JPS53172A - Frequency detection method - Google Patents

Frequency detection method

Info

Publication number
JPS53172A
JPS53172A JP7326676A JP7326676A JPS53172A JP S53172 A JPS53172 A JP S53172A JP 7326676 A JP7326676 A JP 7326676A JP 7326676 A JP7326676 A JP 7326676A JP S53172 A JPS53172 A JP S53172A
Authority
JP
Japan
Prior art keywords
detection method
frequency detection
promote
accuracy
changing
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
JP7326676A
Other languages
English (en)
Inventor
Terunobu Miyazaki
Kazuo Seo
Yoshiteru Miki
Junichi Makino
Masuo Goto
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 JP7326676A priority Critical patent/JPS53172A/ja
Publication of JPS53172A publication Critical patent/JPS53172A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)
JP7326676A 1976-06-23 1976-06-23 Frequency detection method Pending JPS53172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7326676A JPS53172A (en) 1976-06-23 1976-06-23 Frequency detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7326676A JPS53172A (en) 1976-06-23 1976-06-23 Frequency detection method

Publications (1)

Publication Number Publication Date
JPS53172A true JPS53172A (en) 1978-01-05

Family

ID=13513186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7326676A Pending JPS53172A (en) 1976-06-23 1976-06-23 Frequency detection method

Country Status (1)

Country Link
JP (1) JPS53172A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622182U (ja) * 1979-07-31 1981-02-27
JPS59200521A (ja) * 1983-04-27 1984-11-13 Yaskawa Electric Mfg Co Ltd 正弦波信号の零交差点検出方法
JPS61186865A (ja) * 1985-02-14 1986-08-20 Meidensha Electric Mfg Co Ltd 周波数継電器
JPS63228076A (ja) * 1986-08-20 1988-09-22 Matsushita Electric Ind Co Ltd デイジタル周期測定装置
JPS63285472A (ja) * 1987-05-19 1988-11-22 Hitachi Ltd 周波数検出装置
US5184044A (en) * 1990-08-13 1993-02-02 Welch Allyn, Inc. Dental curing lamp
JP2012167971A (ja) * 2011-02-14 2012-09-06 Synthesize Ltd 受信時間の検出方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50126277A (ja) * 1974-03-22 1975-10-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50126277A (ja) * 1974-03-22 1975-10-03

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622182U (ja) * 1979-07-31 1981-02-27
JPS59200521A (ja) * 1983-04-27 1984-11-13 Yaskawa Electric Mfg Co Ltd 正弦波信号の零交差点検出方法
JPS61186865A (ja) * 1985-02-14 1986-08-20 Meidensha Electric Mfg Co Ltd 周波数継電器
JPH0740051B2 (ja) * 1985-02-14 1995-05-01 株式会社明電舍 周波数継電器
JPS63228076A (ja) * 1986-08-20 1988-09-22 Matsushita Electric Ind Co Ltd デイジタル周期測定装置
JPS63285472A (ja) * 1987-05-19 1988-11-22 Hitachi Ltd 周波数検出装置
US5184044A (en) * 1990-08-13 1993-02-02 Welch Allyn, Inc. Dental curing lamp
JP2012167971A (ja) * 2011-02-14 2012-09-06 Synthesize Ltd 受信時間の検出方法

Similar Documents

Publication Publication Date Title
JPS5228365A (en) Amplitude value calculating appartus
JPS53172A (en) Frequency detection method
JPS5311A (en) S/n ratio enhancing unit
JPS5337472A (en) Frequency comparator
JPS52154055A (en) Fault point locator
JPS52103654A (en) Amplitude calculator
JPS5316544A (en) Recording method of program processing time
JPS5395676A (en) Speed measuring system
JPS5313962A (en) Frequency detecting method
JPS5415784A (en) Phase detecting method
JPS5373056A (en) Analog-digital converter
JPS5441783A (en) Method and apparatus for detection of ultrasonic wave receiving signals
JPS52100150A (en) Failure section detecting method of cable line
JPS5424567A (en) Reproducing method of carrier
JPS525580A (en) Reversibee stop-watch
JPS5363083A (en) Detecting circuit for minute changing quantity
JPS5367320A (en) Input/output device
JPS5210795A (en) Sampling method
JPS5316840A (en) Stepout detection and protection method for power system
JPS5315168A (en) Pulse separation measuring system
JPS5290053A (en) Making instruction system colosure of synchroneous generator
JPS5345856A (en) Method of detecting overload by strain gauge of crane
JPS52130675A (en) Measuring apparatus for carrier wave signal power
JPS5456481A (en) Phase detection method
JPS5351853A (en) Position detector