JPS57142505A - Measuring device for inner diameter of fine tube - Google Patents

Measuring device for inner diameter of fine tube

Info

Publication number
JPS57142505A
JPS57142505A JP2909981A JP2909981A JPS57142505A JP S57142505 A JPS57142505 A JP S57142505A JP 2909981 A JP2909981 A JP 2909981A JP 2909981 A JP2909981 A JP 2909981A JP S57142505 A JPS57142505 A JP S57142505A
Authority
JP
Japan
Prior art keywords
fine tube
inner diameter
passing
laser light
detected
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
JP2909981A
Other languages
Japanese (ja)
Inventor
Norio Takahashi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2909981A priority Critical patent/JPS57142505A/en
Publication of JPS57142505A publication Critical patent/JPS57142505A/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
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
    • G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters

Landscapes

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

Abstract

PURPOSE:To perform reliable measurement of an inner diameter of fine tubes without adjustment, by a method wherein laser light passing through a fine tube is detected by a photo detector, meanwhile, laser light from a beam splitter is detected to produce a reference voltage, and the measurement of the inner diameter is obtained by a fine tube inner diameter detecting signal processor through a comparision amplifier. CONSTITUTION:A part 24 of a laser light bundle, radiated from a laser tube 2, is fetched by a beam splitter 21, and a part 6, advancing in a beeline, forms a parallel light beam 6' after passing through a lens 12. A transparent fine tube 11 to be measured is irradiated with light 6''' passing through a polarizing mirror 8 and a collecting lens 10. Light beam passing through the fine tube is collected by a lens 10' and is detected by a photo detector 13. A detecting voltage Vo produces an input of a comparision amplifier 15. Meanwhile, laser light 24, so fetched, is detected by a photo detector 22 to produce a reference voltage V's via an amplifier 23. Irradiated light to fine tube is scanned by a polarizing mirror 8, and this obtains a signal passing through both the thick wall part and inner diameter part of the fine tube. As a result, simply through a change in a laser light source, both the reference voltage V's and the detecting voltage Vo fluctuate to perform a compensation.
JP2909981A 1981-02-27 1981-02-27 Measuring device for inner diameter of fine tube Pending JPS57142505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2909981A JPS57142505A (en) 1981-02-27 1981-02-27 Measuring device for inner diameter of fine tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2909981A JPS57142505A (en) 1981-02-27 1981-02-27 Measuring device for inner diameter of fine tube

Publications (1)

Publication Number Publication Date
JPS57142505A true JPS57142505A (en) 1982-09-03

Family

ID=12266894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2909981A Pending JPS57142505A (en) 1981-02-27 1981-02-27 Measuring device for inner diameter of fine tube

Country Status (1)

Country Link
JP (1) JPS57142505A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978223A (en) * 1989-03-08 1990-12-18 Westinghouse Electric Corp. Determination of dimensions of tubes
WO2006075832A1 (en) * 2005-01-13 2006-07-20 Ls Cable Ltd. Outer and inner diameter measuring apparatus and method for transparent tube
WO2013021137A1 (en) 2011-08-08 2013-02-14 Msc & Sgcc Optoelectronic method and device for measuring the inner diameter of a hollow body
EP4443103A1 (en) 2023-04-04 2024-10-09 Vetreria Etrusca S.r.l Optical method for nondestructive measurement of the thickness of a hollow container

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978223A (en) * 1989-03-08 1990-12-18 Westinghouse Electric Corp. Determination of dimensions of tubes
WO2006075832A1 (en) * 2005-01-13 2006-07-20 Ls Cable Ltd. Outer and inner diameter measuring apparatus and method for transparent tube
WO2013021137A1 (en) 2011-08-08 2013-02-14 Msc & Sgcc Optoelectronic method and device for measuring the inner diameter of a hollow body
FR2979011A1 (en) * 2011-08-08 2013-02-15 Msc & Sgcc OPTOELECTRONIC METHOD AND APPARATUS FOR MEASURING THE INTERNAL DIAMETER OF A HOLLOW BODY
US9243893B2 (en) 2011-08-08 2016-01-26 Msc & Sgcc Optoelectronic method and appliance for measuring the inside diameter of a hollow body
EP4443103A1 (en) 2023-04-04 2024-10-09 Vetreria Etrusca S.r.l Optical method for nondestructive measurement of the thickness of a hollow container

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