JPS54119966A - Method of measuring pulse density - Google Patents

Method of measuring pulse density

Info

Publication number
JPS54119966A
JPS54119966A JP2661378A JP2661378A JPS54119966A JP S54119966 A JPS54119966 A JP S54119966A JP 2661378 A JP2661378 A JP 2661378A JP 2661378 A JP2661378 A JP 2661378A JP S54119966 A JPS54119966 A JP S54119966A
Authority
JP
Japan
Prior art keywords
pulse
measured
interval
pulses
pulse density
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
JP2661378A
Other languages
Japanese (ja)
Inventor
Masahiro Ueno
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 JP2661378A priority Critical patent/JPS54119966A/en
Publication of JPS54119966A publication Critical patent/JPS54119966A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)

Abstract

PURPOSE: To enable to measure accurately pulse density over all speed range by extracting a pulse having interval near predetermined interval from pulse train to be measured and using pulse repetition number of the pulse to be measured within the interval and that of the interval.
CONSTITUTION: The frequency of first clock pulse PC1 is divided to form second clock pulse PC2 to extract the pulses PV1, PV3 of the inrerval near the pulse PC2 of the pulse train PV to be measured and immediately before that. The intervals of these two pulses are counted by the pulse PC1 to obtain the counted value NCO1 and the pulse repetition number NV11 of the pulse to be measured within the pulses PV1, PV3. Thus, the pulse density NV=NV1/NC0 is obtained. Thus, the accuracy becomes ε=±1/NC0. When the frequency division ratio of the pulse PC2 is set to 1/m, it becomes εS≈1/m. Accordingly, it can measure accurately the pulse density over the all speed range.
COPYRIGHT: (C)1979,JPO&Japio
JP2661378A 1978-03-10 1978-03-10 Method of measuring pulse density Pending JPS54119966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2661378A JPS54119966A (en) 1978-03-10 1978-03-10 Method of measuring pulse density

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2661378A JPS54119966A (en) 1978-03-10 1978-03-10 Method of measuring pulse density

Publications (1)

Publication Number Publication Date
JPS54119966A true JPS54119966A (en) 1979-09-18

Family

ID=12198333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2661378A Pending JPS54119966A (en) 1978-03-10 1978-03-10 Method of measuring pulse density

Country Status (1)

Country Link
JP (1) JPS54119966A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025828A (en) * 1973-07-10 1975-03-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025828A (en) * 1973-07-10 1975-03-18

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