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.)
Granted
Application number
JP10506579A
Other languages
Japanese (ja)
Other versions
JPS6226417B2 (en
Inventor
Hiroshi Makihira
Toshimitsu Hamada
Yasuo Nakagawa
Makoto Uko
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.)
NIPPON NUCLEAR FUELS
NUCLEAR FUEL CO Ltd
Hitachi Ltd
Original Assignee
NIPPON NUCLEAR FUELS
NUCLEAR FUEL 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 NIPPON NUCLEAR FUELS, NUCLEAR FUEL CO Ltd, Hitachi Ltd filed Critical NIPPON NUCLEAR FUELS
Priority to JP10506579A priority Critical patent/JPS5629147A/en
Priority to FR8015979A priority patent/FR2461944A1/en
Priority to GB8023661A priority patent/GB2057675B/en
Priority to US06/170,181 priority patent/US4410278A/en
Priority to DE19803027373 priority patent/DE3027373A1/en
Publication of JPS5629147A publication Critical patent/JPS5629147A/en
Publication of JPS6226417B2 publication Critical patent/JPS6226417B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

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.
JP10506579A 1979-07-20 1979-08-20 Automatic physical appearance inspection unit for cylindrical object Granted JPS5629147A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP10506579A JPS5629147A (en) 1979-08-20 1979-08-20 Automatic physical appearance inspection unit for cylindrical object
FR8015979A FR2461944A1 (en) 1979-07-20 1980-07-18 METHOD AND APPARATUS FOR EXAMINING THE OUTER ASPECT OF A FULL CYLINDRICAL OBJECT
GB8023661A GB2057675B (en) 1979-07-20 1980-07-18 Photoelectric detection of surface defects
US06/170,181 US4410278A (en) 1979-07-20 1980-07-18 Method and apparatus for appearance inspection
DE19803027373 DE3027373A1 (en) 1979-07-20 1980-07-18 METHOD AND DEVICE FOR SURFACE TESTING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10506579A JPS5629147A (en) 1979-08-20 1979-08-20 Automatic physical appearance inspection unit for cylindrical object

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
JP10506579A Granted JPS5629147A (en) 1979-07-20 1979-08-20 Automatic physical appearance inspection unit for cylindrical object

Country Status (1)

Country Link
JP (1) JPS5629147A (en)

Cited By (8)

* 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
JP2019132668A (en) * 2018-01-30 2019-08-08 株式会社椿本チエイン Elongation determination device, elongation determination method, and computer program

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 川崎製鉄株式会社 protective fence

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 (8)

* 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
JP2019132668A (en) * 2018-01-30 2019-08-08 株式会社椿本チエイン Elongation determination device, elongation determination method, and computer program

Also Published As

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

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