JPS57211563A - Approximating method for input wave form - Google Patents

Approximating method for input wave form

Info

Publication number
JPS57211563A
JPS57211563A JP9764481A JP9764481A JPS57211563A JP S57211563 A JPS57211563 A JP S57211563A JP 9764481 A JP9764481 A JP 9764481A JP 9764481 A JP9764481 A JP 9764481A JP S57211563 A JPS57211563 A JP S57211563A
Authority
JP
Japan
Prior art keywords
wave form
input wave
polynominal
point
sampling
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
JP9764481A
Other languages
Japanese (ja)
Inventor
Koichiro Shimizu
Kazuo Ito
Yoshio Yoshida
Arihiro Hosoku
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP9764481A priority Critical patent/JPS57211563A/en
Publication of JPS57211563A publication Critical patent/JPS57211563A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/04—Arrangements for displaying electric variables or waveforms for producing permanent records

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To obtain a point, other than a sampling point, of an input wave form, smoothly changing, as an output being near to the input wave form, by computing and processing a given defined polynominal of degree N based on sampling values found N+1 times. CONSTITUTION:A smooth input signal, freed from a noise component by a filter 1, is inputted to a memory 3 which is sampled by an A/D converter 2. In a computing circuit 4 controlled by a control circuit 5 based on sampling values (XM, YM), (XM+1, YM+1)...(XM+N+1 YM+N+1) found N+1 times N+1 pieces of simultaneous equations, satisfying an approximate polynominal of degree N shown by formulaI, are formed and the coefficient of the polynominal formulaIis decided to record a wave form value, satisfying the formulaI, in a plotter 6. This permits outputting of an input wave form value approximating an input wave form which smoothly changes against also a point other than a sampling point.
JP9764481A 1981-06-24 1981-06-24 Approximating method for input wave form Pending JPS57211563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9764481A JPS57211563A (en) 1981-06-24 1981-06-24 Approximating method for input wave form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9764481A JPS57211563A (en) 1981-06-24 1981-06-24 Approximating method for input wave form

Publications (1)

Publication Number Publication Date
JPS57211563A true JPS57211563A (en) 1982-12-25

Family

ID=14197824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9764481A Pending JPS57211563A (en) 1981-06-24 1981-06-24 Approximating method for input wave form

Country Status (1)

Country Link
JP (1) JPS57211563A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082868A (en) * 1983-10-03 1985-05-11 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Method and device for regenerating analog signal
US5515457A (en) * 1990-09-07 1996-05-07 Kikusui Electronics Corporation Apparatus and method for interpolating sampled signals

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630653A (en) * 1979-08-20 1981-03-27 Tektronix Inc Digital oscilloscope

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630653A (en) * 1979-08-20 1981-03-27 Tektronix Inc Digital oscilloscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082868A (en) * 1983-10-03 1985-05-11 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Method and device for regenerating analog signal
US5515457A (en) * 1990-09-07 1996-05-07 Kikusui Electronics Corporation Apparatus and method for interpolating sampled signals

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