JPH01284742A - Surface defect detecting device - Google Patents

Surface defect detecting device

Info

Publication number
JPH01284742A
JPH01284742A JP11411088A JP11411088A JPH01284742A JP H01284742 A JPH01284742 A JP H01284742A JP 11411088 A JP11411088 A JP 11411088A JP 11411088 A JP11411088 A JP 11411088A JP H01284742 A JPH01284742 A JP H01284742A
Authority
JP
Japan
Prior art keywords
optical fiber
reflection type
type optical
roller component
distance
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
JP11411088A
Other languages
Japanese (ja)
Inventor
Kazumi Haga
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP11411088A priority Critical patent/JPH01284742A/en
Publication of JPH01284742A publication Critical patent/JPH01284742A/en
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/95Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/952Inspecting the exterior surface of cylindrical bodies or wires

Abstract

PURPOSE:To accurately detect a defect part in the surface of a body to be inspected by setting the distance between an end surface part of a reflection type optical fiber sensor and the surface of the body to be inspected within such a range that the output characteristics of the reflection type optical fiber sensor are saturated to enter a peak area. CONSTITUTION:Light from a projection lamp 34 in the reflection type optical fiber sensor 3 is projected on the surface of a roller component 1 which is rotated from a head part 33 through a projection optical fiber 31. Reflected light from the surface of the roller component 1 is projected on a photodetector through a photodetection fiber 32 and converted photoelectrically. In this case, if there is a defect such as a projection or recess in the surface of the roller component 1, the output signal of a photodetector 35 varies in level, which is judged by a processing part 36 to detect the defect position. Since the distance between the roller component 1 and head part 33 is set initially to the center value of the distance range corresponding to the saturation peak area of the output characteristics of the reflection type optical fiber 3, an error based upon shape accuracy is eliminated and accurate detection is possible.
JP11411088A 1988-05-11 1988-05-11 Surface defect detecting device Granted JPH01284742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11411088A JPH01284742A (en) 1988-05-11 1988-05-11 Surface defect detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11411088A JPH01284742A (en) 1988-05-11 1988-05-11 Surface defect detecting device

Publications (1)

Publication Number Publication Date
JPH01284742A true JPH01284742A (en) 1989-11-16

Family

ID=14629378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11411088A Granted JPH01284742A (en) 1988-05-11 1988-05-11 Surface defect detecting device

Country Status (1)

Country Link
JP (1) JPH01284742A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100791170B1 (en) * 2006-04-14 2008-01-02 엘에스전선 주식회사 Apparatus and method for detecting scratches on metal surface using machine vision
JP2011214982A (en) * 2010-03-31 2011-10-27 Sumitomo Chemical Co Ltd Die unevenness inspection device and die unevenness inspection method
CN103091336A (en) * 2013-02-05 2013-05-08 济南大学 Optical fiber sensor system for detecting defect on surface of steel ball
CN103776843A (en) * 2014-01-26 2014-05-07 济南大学 Compensation method of steel ball surface detect measuring system based on optical fiber sensing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100791170B1 (en) * 2006-04-14 2008-01-02 엘에스전선 주식회사 Apparatus and method for detecting scratches on metal surface using machine vision
JP2011214982A (en) * 2010-03-31 2011-10-27 Sumitomo Chemical Co Ltd Die unevenness inspection device and die unevenness inspection method
CN103091336A (en) * 2013-02-05 2013-05-08 济南大学 Optical fiber sensor system for detecting defect on surface of steel ball
CN103776843A (en) * 2014-01-26 2014-05-07 济南大学 Compensation method of steel ball surface detect measuring system based on optical fiber sensing

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