JPS6484147A - Internal quality inspecting method for metal piece - Google Patents
Internal quality inspecting method for metal pieceInfo
- Publication number
- JPS6484147A JPS6484147A JP62243517A JP24351787A JPS6484147A JP S6484147 A JPS6484147 A JP S6484147A JP 62243517 A JP62243517 A JP 62243517A JP 24351787 A JP24351787 A JP 24351787A JP S6484147 A JPS6484147 A JP S6484147A
- Authority
- JP
- Japan
- Prior art keywords
- metal piece
- image signals
- light
- image
- picture elements
- 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
Links
Landscapes
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
PURPOSE:To inspect the internal quality of the metal piece accurately and automatically in a short time without requiring skillfulness by finding a light-shade degree histogram as to an image signal of one stored screen of the metal piece. CONSTITUTION:A TV camera 3 picks up an image of the metal piece 1 to be inspected and outputs its image signal to an A/D converter 4. The A/D converter 4 divides one screen of the image signal into previously frictionized picture element units and image signals of respective picture elements are converted into digital image signals of plural stages corresponding to the light-shade level of the image. Then the image signals are stored in a storage part 6 in the frictionized picture element units. Then an arithmetic part 7 counts picture elements having the same light-shade degree as to the digital image signals of one stored screen to find the light-shade degree histogram. Further, the arithmetic part 7 uses the minimum light-shade degree of the histogram as a threshold value to convert the image signals of one stored screen into binary signals, picture elements having the same value and adjoin to each other among the binary image signals are put in connection areas, and the internal quality of the metal piece is inspected by using the umber of picture elements and shape of the connection areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62243517A JPS6484147A (en) | 1987-09-28 | 1987-09-28 | Internal quality inspecting method for metal piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62243517A JPS6484147A (en) | 1987-09-28 | 1987-09-28 | Internal quality inspecting method for metal piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6484147A true JPS6484147A (en) | 1989-03-29 |
Family
ID=17105085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62243517A Pending JPS6484147A (en) | 1987-09-28 | 1987-09-28 | Internal quality inspecting method for metal piece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6484147A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03269241A (en) * | 1990-03-19 | 1991-11-29 | Toshiba Eng Co Ltd | Nonmetallic inclusion testing method and nonmetallic inclusion testing device |
| JPH04110643A (en) * | 1990-08-30 | 1992-04-13 | Nippon Steel Corp | Plate-material inspecting method |
| JPH0599860A (en) * | 1991-10-09 | 1993-04-23 | Nippon Steel Corp | Apparatus and method for evaluating surface quality and internal quality of metallic material |
| JPH05332950A (en) * | 1992-05-26 | 1993-12-17 | Mitsubishi Rayon Co Ltd | Defect inspection instrument |
| JPH0611458A (en) * | 1992-06-25 | 1994-01-21 | Mitsubishi Rayon Co Ltd | Defect inspection equipment |
| JPH0682385A (en) * | 1992-09-01 | 1994-03-22 | Mitsubishi Rayon Co Ltd | Defect inspection device |
| JPH06102192A (en) * | 1992-09-17 | 1994-04-15 | Sumitomo Wiring Syst Ltd | Pressure bonding inspection method for pressure bonded terminal |
| JPH095056A (en) * | 1995-06-19 | 1997-01-10 | Nireco Corp | Surface deformation inspection device |
| JP2004317431A (en) * | 2003-04-18 | 2004-11-11 | Denso Corp | Foreign matter inspection method and foreign matter inspection device |
| JP2005010008A (en) * | 2003-06-19 | 2005-01-13 | Nippon Steel Corp | Surface flaw inspection method and apparatus |
| JP2007155405A (en) * | 2005-12-01 | 2007-06-21 | Tdk Corp | Appearance inspection method and appearance inspection apparatus |
| JP2019533140A (en) * | 2016-09-12 | 2019-11-14 | ポスコＰｏｓｃｏ | Segregation analyzer and method |
| JP2022166369A (en) * | 2021-04-21 | 2022-11-02 | 株式会社ジェイテクト | Device and method for determining state of corrosion and quality evaluation device |
-
1987
- 1987-09-28 JP JP62243517A patent/JPS6484147A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03269241A (en) * | 1990-03-19 | 1991-11-29 | Toshiba Eng Co Ltd | Nonmetallic inclusion testing method and nonmetallic inclusion testing device |
| JPH04110643A (en) * | 1990-08-30 | 1992-04-13 | Nippon Steel Corp | Plate-material inspecting method |
| JPH0599860A (en) * | 1991-10-09 | 1993-04-23 | Nippon Steel Corp | Apparatus and method for evaluating surface quality and internal quality of metallic material |
| JPH05332950A (en) * | 1992-05-26 | 1993-12-17 | Mitsubishi Rayon Co Ltd | Defect inspection instrument |
| JPH0611458A (en) * | 1992-06-25 | 1994-01-21 | Mitsubishi Rayon Co Ltd | Defect inspection equipment |
| JPH0682385A (en) * | 1992-09-01 | 1994-03-22 | Mitsubishi Rayon Co Ltd | Defect inspection device |
| JPH06102192A (en) * | 1992-09-17 | 1994-04-15 | Sumitomo Wiring Syst Ltd | Pressure bonding inspection method for pressure bonded terminal |
| JPH095056A (en) * | 1995-06-19 | 1997-01-10 | Nireco Corp | Surface deformation inspection device |
| JP2004317431A (en) * | 2003-04-18 | 2004-11-11 | Denso Corp | Foreign matter inspection method and foreign matter inspection device |
| JP2005010008A (en) * | 2003-06-19 | 2005-01-13 | Nippon Steel Corp | Surface flaw inspection method and apparatus |
| JP2007155405A (en) * | 2005-12-01 | 2007-06-21 | Tdk Corp | Appearance inspection method and appearance inspection apparatus |
| JP2019533140A (en) * | 2016-09-12 | 2019-11-14 | ポスコＰｏｓｃｏ | Segregation analyzer and method |
| JP2022166369A (en) * | 2021-04-21 | 2022-11-02 | 株式会社ジェイテクト | Device and method for determining state of corrosion and quality evaluation device |
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