GB2009414A - Thickness measuring device and method - Google Patents

Thickness measuring device and method

Info

Publication number
GB2009414A
GB2009414A GB7843026A GB7843026A GB2009414A GB 2009414 A GB2009414 A GB 2009414A GB 7843026 A GB7843026 A GB 7843026A GB 7843026 A GB7843026 A GB 7843026A GB 2009414 A GB2009414 A GB 2009414A
Authority
GB
United Kingdom
Prior art keywords
blade
measuring device
passageways
coil
changes
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.)
Granted
Application number
GB7843026A
Other versions
GB2009414B (en
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA, SNECMA SAS filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of GB2009414A publication Critical patent/GB2009414A/en
Application granted granted Critical
Publication of GB2009414B publication Critical patent/GB2009414B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/003—Arrangements for testing or measuring
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The thickness of the walls of a hollow gas turbine blade 1 and/or the volume of the passageways 2 in the blade 1 is measured by introducing a ferromagnetic liquid into the passageways 2 by means of a cylinder 7 and piston 8 arrangements and scanning the outer surface of the blade 1 with an electromagnetic probe 11 which includes a coil. Changes in the impedance of the coil, connected in an A.C. bridge circuit, are recorded and the record compared with changes in impedance caused by moving the probe 11 over a standard blade of known dimensions. <IMAGE>
GB7843026A 1977-11-04 1978-11-02 Thickness measuring device and method Expired GB2009414B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7733679A FR2408116A1 (en) 1977-11-04 1977-11-04 METHOD OF MEASURING THE THICKNESS OF HOLLOW ROOM WALLS AND THE VOLUME OF CELLARS

Publications (2)

Publication Number Publication Date
GB2009414A true GB2009414A (en) 1979-06-13
GB2009414B GB2009414B (en) 1982-03-10

Family

ID=9197420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7843026A Expired GB2009414B (en) 1977-11-04 1978-11-02 Thickness measuring device and method

Country Status (3)

Country Link
DE (1) DE2847763A1 (en)
FR (1) FR2408116A1 (en)
GB (1) GB2009414B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012265A (en) * 1983-07-01 1985-01-22 Nippon Kokan Kk <Nkk> Method for measuring thickness of solidified layer
CN112361929B (en) * 2020-10-30 2022-04-08 海南方能测试技术有限公司 Building major structure protective layer thickness verifying attachment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB547714A (en) * 1941-05-12 1942-09-08 Alan Marsh Armour Improvements in or relating to the detection of variation in wall thickness of tubes of magnetic material
DE1009400B (en) * 1956-04-04 1957-05-29 Karl Deutsch Arrangement and probe for measuring the thickness of non-ferromagnetic layers on a ferromagnetic base
NL6403501A (en) * 1964-04-02 1965-10-04

Also Published As

Publication number Publication date
FR2408116B1 (en) 1980-04-25
DE2847763A1 (en) 1979-05-10
FR2408116A1 (en) 1979-06-01
DE2847763C2 (en) 1987-01-22
GB2009414B (en) 1982-03-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19971102