JPS5629147A - Automatic physical appearance inspection unit for cylindrical object - Google Patents

Automatic physical appearance inspection unit for cylindrical object

Info

Publication number
JPS5629147A
JPS5629147A JP10506579A JP10506579A JPS5629147A JP S5629147 A JPS5629147 A JP S5629147A JP 10506579 A JP10506579 A JP 10506579A JP 10506579 A JP10506579 A JP 10506579A JP S5629147 A JPS5629147 A JP S5629147A
Authority
JP
Japan
Prior art keywords
cylindrical object
leading
picture element
sequentially
circuit
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
JP10506579A
Other versions
JPS6226417B2 (en
Inventor
Toshimitsu Hamada
Hiroshi Makihira
Yasuo Nakagawa
Makoto Uko
Original Assignee
Hitachi Ltd
Nuclear Fuel 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 Hitachi Ltd, Nuclear Fuel Co Ltd filed Critical Hitachi Ltd
Priority to JP54105065A priority Critical patent/JPS6226417B2/ja
Priority claimed from DE19803027373 external-priority patent/DE3027373C2/de
Publication of JPS5629147A publication Critical patent/JPS5629147A/en
Publication of JPS6226417B2 publication Critical patent/JPS6226417B2/ja
Application status is Expired legal-status Critical

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 infra-red, visible or ultra-violet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination

Abstract

PURPOSE:To sequentially inspect the external surface of cylindrical object in a row, by processing the binary picture element signal output from the binary circuit based on the coordinate set with the coordinate setting means. CONSTITUTION:The edge detection circuit 27 differentiates the binary picture element signal, and stores it in the respective counters for leading and trailing, and when the picture element signal of scanning line includes the leading of the edge, the count is started and the distribution frequency is obtained, it is sequentially compared at the comparators and the address showing a maximum is output respectively. The threshold set circuit 37 stores the bightness of digital video signal at the leading of each edge to the address of memory corresponding to the level to obtain the distribution of frequency and the bright level showing the maximum value is set as new threshold value. This newly binarized signal is input to the processing decision circuit 44, and it is compared with the criteria for propriety. Thus, the external circumference of cylindrical object in a row can accurately and efficiently be inspected sequentially.
JP54105065A 1979-08-20 1979-08-20 Expired JPS6226417B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54105065A JPS6226417B2 (en) 1979-08-20 1979-08-20

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP54105065A JPS6226417B2 (en) 1979-08-20 1979-08-20
DE19803027373 DE3027373C2 (en) 1979-07-20 1980-07-18
FR8015979A FR2461944B1 (en) 1979-07-20 1980-07-18
US06/170,181 US4410278A (en) 1979-07-20 1980-07-18 Method and apparatus for appearance inspection
GB8023661A GB2057675B (en) 1979-07-20 1980-07-18 Photoelectric detection of surface defects

Publications (2)

Publication Number Publication Date
JPS5629147A true JPS5629147A (en) 1981-03-23
JPS6226417B2 JPS6226417B2 (en) 1987-06-09

Family

ID=14397551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54105065A Expired JPS6226417B2 (en) 1979-08-20 1979-08-20

Country Status (1)

Country Link
JP (1) JPS6226417B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235786A (en) * 1989-11-06 1993-08-17 Mitsubishi Jukogyo Kabushiki Kaisha Hourglass worm gear
JPH06138053A (en) * 1992-05-25 1994-05-20 Nec Corp Ic case visual inspector
US5325634A (en) * 1989-11-06 1994-07-05 Mitsubishi Jukogyo Kabushiki Kaisha Hourglass worm gear
US5652432A (en) * 1994-06-28 1997-07-29 Mitsubishi Nuclear Fuel Co. Cylindrical body inspection apparatus utilizing displacement information and reflected light information
JP2006208371A (en) * 2004-12-28 2006-08-10 Showa Denko Kk Cylinder inspecting apparatus and cylinder inspecting method
JP2007285869A (en) * 2006-04-17 2007-11-01 Denso Corp Surface inspection system and surface inspection method
US7798033B2 (en) 2002-11-14 2010-09-21 Ims Gear Gmbh Power-assisted steering having a gear mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04122722U (en) * 1991-04-19 1992-11-05

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53125057A (en) * 1977-04-08 1978-11-01 Hitachi Ltd Inspection apparatus for appearance of cylindrical object

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53125057A (en) * 1977-04-08 1978-11-01 Hitachi Ltd Inspection apparatus for appearance of cylindrical object

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235786A (en) * 1989-11-06 1993-08-17 Mitsubishi Jukogyo Kabushiki Kaisha Hourglass worm gear
US5325634A (en) * 1989-11-06 1994-07-05 Mitsubishi Jukogyo Kabushiki Kaisha Hourglass worm gear
JPH06138053A (en) * 1992-05-25 1994-05-20 Nec Corp Ic case visual inspector
US5652432A (en) * 1994-06-28 1997-07-29 Mitsubishi Nuclear Fuel Co. Cylindrical body inspection apparatus utilizing displacement information and reflected light information
US7798033B2 (en) 2002-11-14 2010-09-21 Ims Gear Gmbh Power-assisted steering having a gear mechanism
JP2006208371A (en) * 2004-12-28 2006-08-10 Showa Denko Kk Cylinder inspecting apparatus and cylinder inspecting method
JP2007285869A (en) * 2006-04-17 2007-11-01 Denso Corp Surface inspection system and surface inspection method

Also Published As

Publication number Publication date
JPS6226417B2 (en) 1987-06-09

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