JPS57119204A - Turbine rotor elongation detector - Google Patents

Turbine rotor elongation detector

Info

Publication number
JPS57119204A
JPS57119204A JP500081A JP500081A JPS57119204A JP S57119204 A JPS57119204 A JP S57119204A JP 500081 A JP500081 A JP 500081A JP 500081 A JP500081 A JP 500081A JP S57119204 A JPS57119204 A JP S57119204A
Authority
JP
Japan
Prior art keywords
rotor
wheel
reflected light
beam splitter
elongation
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
JP500081A
Other languages
Japanese (ja)
Inventor
Osamu Matsui
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 Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
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 Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP500081A priority Critical patent/JPS57119204A/en
Publication of JPS57119204A publication Critical patent/JPS57119204A/en
Pending 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
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Control Of Turbines (AREA)

Abstract

PURPOSE:To detect the elongation of a rotor at a high reliability by checking variations in the quantity of reflected light with a microlens arranged sandwiching a wheel to project and receive light through an optical fiber while the radially vertical surface of the wheel mounted on a turbine 6 is made flat mirror. CONSTITUTION:Light emitted from a LED8 driven by a LED driver circuit 9 is projected to a mirror surface 4 of a wheel 2 by way of an optical fiber 6, a beam splitter 7 and a rod lens 5, the reflected light returns to the beam splitter 7 and a rod lens 5, the reflected light returns to the beam splitter 7 and input into a PIN photodiode 10. As a turbine rotor 1 elongates, the wheel 2 moves in the radial direction of the rotor to cause a difference in the quantity of the reflected light which enters a pair of photodiodes 10. The outut of the photodiode 10 is input into an arithmetic device 13 via a light receiver 11 and an elongation signal of the rotor 1 is output to a recorder 15 and a alarm setter 16 thereby enabling th detection of the elongation of the rotor 1 at a high reliability.
JP500081A 1981-01-19 1981-01-19 Turbine rotor elongation detector Pending JPS57119204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP500081A JPS57119204A (en) 1981-01-19 1981-01-19 Turbine rotor elongation detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP500081A JPS57119204A (en) 1981-01-19 1981-01-19 Turbine rotor elongation detector

Publications (1)

Publication Number Publication Date
JPS57119204A true JPS57119204A (en) 1982-07-24

Family

ID=11599305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP500081A Pending JPS57119204A (en) 1981-01-19 1981-01-19 Turbine rotor elongation detector

Country Status (1)

Country Link
JP (1) JPS57119204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104457600A (en) * 2014-11-20 2015-03-25 华中科技大学 Testing device of optical fiber collimator array

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104457600A (en) * 2014-11-20 2015-03-25 华中科技大学 Testing device of optical fiber collimator array

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