JPS6441848A - Defect detector for object of continuity - Google Patents

Defect detector for object of continuity

Info

Publication number
JPS6441848A
JPS6441848A JP19842987A JP19842987A JPS6441848A JP S6441848 A JPS6441848 A JP S6441848A JP 19842987 A JP19842987 A JP 19842987A JP 19842987 A JP19842987 A JP 19842987A JP S6441848 A JPS6441848 A JP S6441848A
Authority
JP
Japan
Prior art keywords
continuity
along
length
defect
mean
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
JP19842987A
Other languages
Japanese (ja)
Other versions
JPH0781960B2 (en
Inventor
Masahiro Horie
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.)
Kurabo Industries Ltd
Kurashiki Spinning Co Ltd
Original Assignee
Kurabo Industries Ltd
Kurashiki Spinning 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 Kurabo Industries Ltd, Kurashiki Spinning Co Ltd filed Critical Kurabo Industries Ltd
Priority to JP19842987A priority Critical patent/JPH0781960B2/en
Publication of JPS6441848A publication Critical patent/JPS6441848A/en
Publication of JPH0781960B2 publication Critical patent/JPH0781960B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To achieve a detection of a defect in an object of continuity at a high accuracy, by making a beam-like light scan over the surface of the object of continuity and the reflected light thereof is detected to compare quantity of light data at sampling points with a mean thereof along the same length in the widthwise position. CONSTITUTION:The surface of an object 1 of continuity along the length thereof, even in the cross-section with a certain width, to store 8 quantity of light data at sampling points. A mean 8 of the quantity of light data at sampling points is determined along the length thereof the same in the widthwise position among those data. Then, it is judged whether a deviation 9 between the value at the corresponding sampling point and the mean is within a predetermined range 10. Thus, a defect is determined to exist at the sampling point in the quantity of light data having the deviation exceeding the predetermined range, thereby enabling discrimination of a defect from a groove, if any, along the length of the object.
JP19842987A 1987-08-07 1987-08-07 Defect detection device for continuous objects Expired - Lifetime JPH0781960B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19842987A JPH0781960B2 (en) 1987-08-07 1987-08-07 Defect detection device for continuous objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19842987A JPH0781960B2 (en) 1987-08-07 1987-08-07 Defect detection device for continuous objects

Publications (2)

Publication Number Publication Date
JPS6441848A true JPS6441848A (en) 1989-02-14
JPH0781960B2 JPH0781960B2 (en) 1995-09-06

Family

ID=16390941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19842987A Expired - Lifetime JPH0781960B2 (en) 1987-08-07 1987-08-07 Defect detection device for continuous objects

Country Status (1)

Country Link
JP (1) JPH0781960B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041742A (en) * 1990-04-19 1992-01-07 Fuji Photo Film Co Ltd Copying device
JP2001311693A (en) * 2000-04-28 2001-11-09 Nitto Kogyo Co Ltd Inspection apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041742A (en) * 1990-04-19 1992-01-07 Fuji Photo Film Co Ltd Copying device
JP2001311693A (en) * 2000-04-28 2001-11-09 Nitto Kogyo Co Ltd Inspection apparatus

Also Published As

Publication number Publication date
JPH0781960B2 (en) 1995-09-06

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