GB1486612A - Method of and an apparatus for inspecting a travelling sheet material to detect defects - Google Patents
Method of and an apparatus for inspecting a travelling sheet material to detect defectsInfo
- Publication number
- GB1486612A GB1486612A GB4784474A GB4784474A GB1486612A GB 1486612 A GB1486612 A GB 1486612A GB 4784474 A GB4784474 A GB 4784474A GB 4784474 A GB4784474 A GB 4784474A GB 1486612 A GB1486612 A GB 1486612A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- section
- depth
- detector
- quantified
- 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.)
- Expired
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
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- 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)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
1486612 Photo-electric detection of flaws KAWASAKI STEEL CORP and TOEI DENSHI KOGYO KK 5 Nov 1974 [13 Nov 1973] 47844/74 Heading G1A To analyze defects in a travelling strip 1, Fig. 1, it is scanned with light from a source 2, and light reflected (or transmitted) by the strip is received by detector 5; the detector signal is then pro- cessed to find the width, quantity, length and depth of the defects in the scan, and each of these factors is quantified to show whether it is small, medium or large. The factors are then combined to give an indication of the usability of the strip. The detector signal is amplified at 6 and differentiated at 7; the parts of the signal due to the edges of the strip are blanked out. The width is measured at A, the quantity at B, the length at C and the depth at D. These factors are stored in memories M1-M9 and gated together at AND 1- AND 27 for printing to indicate usability. Width: the detector output for dark and bright defects is shown in Fig. 3, and the differentiated signal from 7 is shown at (a). This latter produces a pulse from bi-stable 11a or 11b depending on the initial polarity of the signal from the detector; the bi-stable's output lasts whilst the defect is being scanned, and is used to gate pulses from an oscillator 13 in timing section E to a counter 15. The counter output is thus a measure of the defect width, and is quantified into small, medium or large at pre-set outputs 16, 17 and 18. Quantity: the signal from 7 activates a differential amplifier 19 in section B whenever the signal exceeds a reference voltage 20. The number of times this happens in a scan is counted at 21 and quantified into small, medium or large on lines N1, N2 or N3. Length: whenever the signal from 7 exceeds reference voltages 23 or 25 in section D, their associated differential amplifiers activate OR gate 26 in section C. This in turn activates bi-stable 27 and counter 28; these also receive a pulse every 5mm. of travel of the sheet, so that the number of 5mm. lengths of travel which contain a defect are counted at 28. This count is quantified at 29, 30, 31. Depth: by comparing the signal from 7 with reference voltages 23, 25 in section D it is possible to determine whether the signal lies below both references, between them, or above both, thus quantifying the depth. Combination: The first three factors above are stored at M1-M9 and combined at AND 1-AND 27 with a timing signal derived from OR gate 26 via inverter 32 and capacitor 33; these AND gates operate a printer (not shown) which indicates which of 27 categories the sheet is in. The timing signal also resets the stores via delay 34. The 27 categories are formed into two groups indicating how usable the sheet is, and are connected to OR gates 41, 42; these gates are connected to AND gates 43-46 which also receive depth signals from section D and produce a further three outputs for operating a sorter to sort tested sheets into piles of good, less good and unusable.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12677373A JPS5079379A (en) | 1973-11-13 | 1973-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1486612A true GB1486612A (en) | 1977-09-21 |
Family
ID=14943561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4784474A Expired GB1486612A (en) | 1973-11-13 | 1974-11-05 | Method of and an apparatus for inspecting a travelling sheet material to detect defects |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS5079379A (en) |
DE (1) | DE2453865A1 (en) |
GB (1) | GB1486612A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2164442A (en) * | 1984-09-11 | 1986-03-19 | De La Rue Syst | Sensing the condition of a document |
CN107345918A (en) * | 2017-08-16 | 2017-11-14 | 广西大学 | A kind of board quality testing apparatus and method |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2454236A1 (en) * | 1979-04-11 | 1980-11-07 | Seita | METHOD AND DEVICE FOR PROCESSING VIDEO SIGNALS |
DE3212438C2 (en) * | 1982-04-02 | 1984-10-25 | Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch | Method for evaluating the analog electrical output signals of a photoelectric light receiving device in optical path scanning devices |
US6600175B1 (en) | 1996-03-26 | 2003-07-29 | Advanced Technology Materials, Inc. | Solid state white light emitter and display using same |
TW383508B (en) | 1996-07-29 | 2000-03-01 | Nichia Kagaku Kogyo Kk | Light emitting device and display |
JP4271747B2 (en) * | 1997-07-07 | 2009-06-03 | 株式会社朝日ラバー | Translucent coating material for light emitting diode and fluorescent color light source |
US6504301B1 (en) * | 1999-09-03 | 2003-01-07 | Lumileds Lighting, U.S., Llc | Non-incandescent lightbulb package using light emitting diodes |
JP3995011B2 (en) * | 2005-10-31 | 2007-10-24 | 日亜化学工業株式会社 | Light emitting diode |
JP2007273562A (en) * | 2006-03-30 | 2007-10-18 | Toshiba Corp | Semiconductor light-emitting device |
US20080029720A1 (en) | 2006-08-03 | 2008-02-07 | Intematix Corporation | LED lighting arrangement including light emitting phosphor |
US7972030B2 (en) | 2007-03-05 | 2011-07-05 | Intematix Corporation | Light emitting diode (LED) based lighting systems |
US7915627B2 (en) | 2007-10-17 | 2011-03-29 | Intematix Corporation | Light emitting device with phosphor wavelength conversion |
US8651692B2 (en) | 2009-06-18 | 2014-02-18 | Intematix Corporation | LED based lamp and light emitting signage |
US9004705B2 (en) | 2011-04-13 | 2015-04-14 | Intematix Corporation | LED-based light sources for light emitting devices and lighting arrangements with photoluminescence wavelength conversion |
US20140185269A1 (en) | 2012-12-28 | 2014-07-03 | Intermatix Corporation | Solid-state lamps utilizing photoluminescence wavelength conversion components |
JP6511528B2 (en) | 2015-03-23 | 2019-05-15 | インテマティックス・コーポレーションIntematix Corporation | Photoluminescent color display |
-
1973
- 1973-11-13 JP JP12677373A patent/JPS5079379A/ja active Pending
-
1974
- 1974-11-05 GB GB4784474A patent/GB1486612A/en not_active Expired
- 1974-11-13 DE DE19742453865 patent/DE2453865A1/en not_active Ceased
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2164442A (en) * | 1984-09-11 | 1986-03-19 | De La Rue Syst | Sensing the condition of a document |
CN107345918A (en) * | 2017-08-16 | 2017-11-14 | 广西大学 | A kind of board quality testing apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
DE2453865A1 (en) | 1975-05-15 |
JPS5079379A (en) | 1975-06-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |