FR2721712B1 - Circuit for calculating the slip of the frequency of an absorption peak. - Google Patents

Circuit for calculating the slip of the frequency of an absorption peak.

Info

Publication number
FR2721712B1
FR2721712B1 FR9407808A FR9407808A FR2721712B1 FR 2721712 B1 FR2721712 B1 FR 2721712B1 FR 9407808 A FR9407808 A FR 9407808A FR 9407808 A FR9407808 A FR 9407808A FR 2721712 B1 FR2721712 B1 FR 2721712B1
Authority
FR
France
Prior art keywords
slip
calculating
frequency
circuit
absorption peak
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.)
Expired - Fee Related
Application number
FR9407808A
Other languages
French (fr)
Other versions
FR2721712A1 (en
Inventor
Jacques Barbot
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.)
Alstom Power Boiler SA
Original Assignee
GEC Alsthom Stein Industrie
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 GEC Alsthom Stein Industrie filed Critical GEC Alsthom Stein Industrie
Priority to FR9407808A priority Critical patent/FR2721712B1/en
Publication of FR2721712A1 publication Critical patent/FR2721712A1/en
Application granted granted Critical
Publication of FR2721712B1 publication Critical patent/FR2721712B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/01—Indexing codes associated with the measuring variable
    • G01N2291/014—Resonance or resonant frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/021—Gases
    • G01N2291/0217—Smoke, combustion gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02408—Solids in gases, e.g. particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02818—Density, viscosity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02854—Length, thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/103—Number of transducers one emitter, two or more receivers
FR9407808A 1994-06-24 1994-06-24 Circuit for calculating the slip of the frequency of an absorption peak. Expired - Fee Related FR2721712B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9407808A FR2721712B1 (en) 1994-06-24 1994-06-24 Circuit for calculating the slip of the frequency of an absorption peak.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9407808A FR2721712B1 (en) 1994-06-24 1994-06-24 Circuit for calculating the slip of the frequency of an absorption peak.

Publications (2)

Publication Number Publication Date
FR2721712A1 FR2721712A1 (en) 1995-12-29
FR2721712B1 true FR2721712B1 (en) 1996-07-26

Family

ID=9464639

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9407808A Expired - Fee Related FR2721712B1 (en) 1994-06-24 1994-06-24 Circuit for calculating the slip of the frequency of an absorption peak.

Country Status (1)

Country Link
FR (1) FR2721712B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4429578A (en) * 1982-03-22 1984-02-07 General Electric Company Acoustical defect detection system
US4581935A (en) * 1984-12-27 1986-04-15 University Of Tennessee Research Corporation Method and apparatus for grading fibers
ATE76972T1 (en) * 1987-03-31 1992-06-15 Benjamin Gavish METHOD AND DEVICE FOR MONITORING SMALL PEAK SHIFTS IN A FREQUENCY SPECTRUM.
US5235844A (en) * 1991-10-23 1993-08-17 Niagara Mohawk Power Corporation Multiple gas property sensor

Also Published As

Publication number Publication date
FR2721712A1 (en) 1995-12-29

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Legal Events

Date Code Title Description
ST Notification of lapse