DE1917877B2 - Device for determining surface defects on a continuous web of material - Google Patents
Device for determining surface defects on a continuous web of materialInfo
- Publication number
- DE1917877B2 DE1917877B2 DE1917877A DE1917877A DE1917877B2 DE 1917877 B2 DE1917877 B2 DE 1917877B2 DE 1917877 A DE1917877 A DE 1917877A DE 1917877 A DE1917877 A DE 1917877A DE 1917877 B2 DE1917877 B2 DE 1917877B2
- Authority
- DE
- Germany
- Prior art keywords
- web
- light
- narrow
- reflected
- photoelectric
- 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
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
- G01N21/8901—Optical details; Scanning details
- G01N21/8903—Optical details; Scanning details using a multiple detector array
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
-
- 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)
Description
bahn so dicht wie möglich nebeneinander und so dicht wie möglich an der Oberfläche dieser Materialbahn über diese gestrahlt werden. Wenn diese Lichtstrahlen LW und LW durch Fehlerstellen 8 bzw. 8' ganz oder teilweise abgefangen und das Licht reflektiert wird, trifft dieses auf die benachbarten Wandler der Wandlerreihe 9, so daß diese entsprechende Ausgangssignale abgeben.web as close as possible next to each other and as close as possible to the surface of this material web are blasted over them. When these light beams LW and LW are wholly or partially intercepted by defects 8 and 8 'and the light is reflected, it strikes the neighboring transducers of the transducer row 9, so that they emit corresponding output signals.
Bei .diesem Ausführungsbeispiel werden die Lichtstrahlen LW und LW' in entgegengesetzte Richtungen und in sehr dicht benachbarten Linien von den jeweils nur etwas von den Längskanten des Bandmaterials 1 entfernt vorgesehenen Lichtquellen ausgestrahlt; auch wenn die Oberfläche der Rolle 2 nicht genau gerade ist, reichen deshalb die Lichtstrahlen LW und LW' sehr dicht an der Oberfläche des Bandmaterials 1 auf der Rolle soweit in die gegenüberliigende Richtung, daß zumindest jeweils die halbe Breite des Bandmaterials 1 einer genauen Prüfung unterworfen ist. Eine solche Ausführungsform ist in dem Fall nützlich, wo der Mittelteil der Rolle aus Gründen der Stabilisierung etwas dicker als die beiden Enden gemacht ist oder in dem Fall, wo die Rolle mehrere Meter lang ist und deshalb leicht durchhängt.In this exemplary embodiment, the light beams LW and LW ' are emitted in opposite directions and in very closely spaced lines from the light sources provided only slightly away from the longitudinal edges of the strip material 1; Even if the surface of the roll 2 is not exactly straight, the light rays LW and LW ' therefore extend very close to the surface of the strip material 1 on the roll so far in the opposite direction that at least half the width of the strip material 1 is subjected to a precise examination is. Such an embodiment is useful in the case where the central part of the roller is made somewhat thicker than the two ends for reasons of stabilization or in the case where the roller is several meters long and therefore sags slightly.
Bei dem in Fig. 3 gezeigten Ausführungsbeispiel wird ein modulierter Lichtstrahl LWM verwendet. Hierzu wird der von der Lichtquelle 6 ausgesandte Lichtstrahl durch eine umlaufende Lochkarte 61, die mit mehreren Löchern 62 versehen ist und über einen Riemen 63 von einem Motor 64 angetrieben ist, periodisch unterbrochen, d.h. moduliert. Damit ist auch das von einer Fehlerstelle 8 reflektierte Licht moduliert und der dieses Licht empfangende Wandler gibt damit ein Wechselstromausgangssignal ab, auch wenn die Fehlerstelle 8 in Längsrichtung relativ laug ist Dieses Modulafionsprinzip kann uuch bei einer Anordnung mit zwei Lichtstrahlen im SinneIn the embodiment shown in FIG. 3, a modulated light beam LWM is used. For this purpose, the light beam emitted by the light source 6 is periodically interrupted, ie modulated, by a circumferential punch card 61 which is provided with several holes 62 and is driven by a motor 64 via a belt 63. This modulates the light reflected by a fault location 8 and the converter receiving this light emits an alternating current output signal, even if the fault location 8 is relatively long in the longitudinal direction
der Fig. 2 angewendet werden.of Fig. 2 can be applied.
Fig 4 zeigt die Kombination eines modulierten Lichtstrahles LWM und eines nicht modulierten Lichtstrahles LW', jeweils ausgesandt von Lichtquellen 6 bzw. 6', die entgegengesetzt zueinander4 shows the combination of a modulated light beam LWM and a non-modulated light beam LW ', each emitted by light sources 6 and 6' which are opposite to one another
!0 dicht nebeneinander über die Oberfläche des Bandmaterials 1 verlaufen. Der Lichtstrahl LWM wird wieder wie in Fig. 3 durch eine Lochblende^moduliert. Bei einer solchen Vorrichtung werden über eine in Längsrichtung verlaufende Fehlerstelle 81 beispiels- ! 0 run close to one another over the surface of the strip material 1. The light beam LWM is again modulated as in Fig. 3 by a pinhole ^. In such a device, for example, a flaw 81 running in the longitudinal direction
X5 weise eine Falte od.dgl., die Lichtstrahlen LWM und LW' ganz oder teilweise abgefangen und so das Licht zu dem nächstgelegenen Wandler der Wandlerreihe 9 reflektiert. Wegen des modulierten Lichtstrahles kann der zugeordnete Wandler dieses LichtX 5 has a fold or the like. The light beams LWM and LW 'are wholly or partially intercepted and the light is thus reflected to the closest transducer in the transducer row 9. Because of the modulated light beam, the assigned converter can produce this light
so auch dann empfangen, wenn die Fehlerstelle 81 relativ lang ist, da er ein Wechselstromsignal abgibt, solange die Fehlerstelle 81 durch den Lichtstrahl LWM läuft. Andererseits wird eine kurze m Längsrichtung liegende Fehlerstelle 82, beispielsweiseso received even if the fault location 81 is relatively long, since it emits an alternating current signal as long as the fault location 81 runs through the light beam LWM. On the other hand, a short flaw 82 lying in the longitudinal direction, for example
ebenfalls eine Falte od. dgl., durch den nicht modulierten Lichtstrahl LW' mit Sicherheit festgestellt und zwar auch dann, wenn der modulierte Lichtstrahl LWM unterbrochen ist und dadurch wird dann ein Ausgangsimpuls an den zugeordneten Wandler er-also a fold or the like, detected with certainty by the non-modulated light beam LW ' , even if the modulated light beam LWM is interrupted and an output pulse is then sent to the associated transducer.
zeugt. Mit dieser Vorrichtung können damit sowohl kurze als auch relativ lange in Längsrichtung verlaufende Fehlerstellen mit Sicherheit festgestellt werden.testifies. With this device, both short and relatively long ones can run in the longitudinal direction Defects can be determined with certainty.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (4)
beleuchtenden Lichtquelle, mit einer quer über Es ist Aufgabe des Erfindungsgegenstandes, eine die Bahnbreite sich erstreckenden Reihe von Vorrichtung zum Feststellen von Oberflächenfehlern photoelektrischen Wandlern, die von der Ma- an einer fortlaufenden Materialbahn zu schaffen, die terialbabn reflektiertes Licht aufnehmen, und io mit Sicherheit die Feststellung sehr feiner und in mit mindestens einem Verstärker zum Verstärken Längsrichtung der Materialbahn-Laufrichtung verder von den photoelektrischen Wandlern korn- laufender erhabener Fehlstellen, wie schmale Falten, menden elektrischen Signale, dadurch ge- aufliegende Materialfasern od. dgl. erlaubt,
kennzeichnet, daß die Lichtquelle (6, 6') Diese Aufgabe wird erfindungsgemäß ausgehend derart neben dem Rand der Materialbahn (1) 15 von einer Vorrichtung der eingangs erwähnten Art angeordnet ist, daß sie einen schmalen Licht- gelöst durch die Merkmale nach dem Hauptanspruch, strahl (LW, LW, LWM) quer zur Bahnbreite Weitere vorteilhafte Ausgestaltungen dieser erfin- und parallel zur Bahnoberfläche zwischen dieser dungsgemäßen Vorrichtung ergeben sich aus den und der Wandlerreihe (9) ausstrahlt. Unteransprüchen.1. Device for determining overflexion working device is only suitable for surface defects on a continuous material 5 detection of coarse and relatively far from the web with at least one the web surface protruding defects,
It is the object of the invention to create a series of devices for detecting surface defects, photoelectric transducers that extend across the width of the web, which from the Ma- on a continuous web of material that absorb materialbabn reflected light, and io with certainty the detection of very fine and raised imperfections running through the grain of the photoelectric converters, such as narrow folds, electrical signals, thereby overlying material fibers or the like, allowed in at least one amplifier for amplifying the longitudinal direction of the material web running direction,
indicates that the light source (6, 6 ') This object is arranged according to the invention in such a way next to the edge of the material web (1) 15 of a device of the type mentioned that it a narrow light is achieved by the features according to the main claim, beam (LW, LW, LWM) transversely to the web width. Further advantageous configurations of this inventively and parallel to the web surface between this device according to the invention result from the and the transducer row (9) emits. Subclaims.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2810968 | 1968-04-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1917877A1 DE1917877A1 (en) | 1969-11-06 |
DE1917877B2 true DE1917877B2 (en) | 1973-09-27 |
DE1917877C3 DE1917877C3 (en) | 1974-04-18 |
Family
ID=12239627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1917877A Expired DE1917877C3 (en) | 1968-04-08 | 1969-04-08 | Device for determining surface defects on a continuous web of material |
Country Status (4)
Country | Link |
---|---|
US (1) | US3588513A (en) |
DE (1) | DE1917877C3 (en) |
FR (1) | FR2005765A1 (en) |
GB (1) | GB1217642A (en) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3736063A (en) * | 1970-08-07 | 1973-05-29 | Mitsubishi Electric Corp | Comparison system for determining shape and intensity of illumination of luminous objects |
US3910124A (en) * | 1971-07-14 | 1975-10-07 | George H Halsey | Non-destructive testing procedures |
DE2141741C3 (en) * | 1971-08-20 | 1980-04-03 | Krauss-Maffei Ag, 8000 Muenchen | Device for detecting the thickness of the kneading at the nip of calender rolls |
US3755674A (en) * | 1972-03-09 | 1973-08-28 | Columbia Res Corp | Method of detecting pinhole defects in sheet material |
US3856414A (en) * | 1973-01-18 | 1974-12-24 | Paulmar Inc | Apparatus for inspecting strip material |
JPS51113783A (en) * | 1975-03-31 | 1976-10-07 | Asahi Chem Ind Co Ltd | Defects detector of nonwoven fabric |
JPS5254484A (en) * | 1975-10-28 | 1977-05-02 | Omron Tateisi Electronics Co | Defect inspecting apparatus |
DE2700004A1 (en) * | 1977-01-03 | 1978-07-06 | Sick Optik Elektronik Erwin | ELECTRO-OPTICAL FOLDING MONITORING DEVICE |
US4170419A (en) * | 1977-02-23 | 1979-10-09 | Camsco, Inc. | Optical web inspection system |
JPS55113491A (en) * | 1979-02-23 | 1980-09-02 | Paanitsuku Kk | Detector for defective seam in toe automatic sewing machine of stocking |
JPS5698634A (en) * | 1980-01-09 | 1981-08-08 | Dainippon Printing Co Ltd | Printed matter testing device |
DE3043849A1 (en) * | 1980-11-21 | 1982-07-08 | Koninklijke Textielfabrieken Nijverdal-Ten Gate N.V., Almelo | METHOD FOR VIEWING A REFLECTIVE AND / OR TRANSPARENT, MOVING TRAIN AND FOAMING MACHINE FOR CARRYING OUT THE METHOD |
JPS57125805A (en) * | 1981-01-30 | 1982-08-05 | Bridgestone Corp | Method and device for measuring width of rubber border of coating sheet |
US4563095A (en) * | 1982-12-20 | 1986-01-07 | Essex Group, Inc. | Method and apparatus for monitoring the surface of elongated objects |
US4877323A (en) * | 1984-11-23 | 1989-10-31 | Stillwagon W C | Method and apparatus for inspecting a high speed web |
US4704603A (en) * | 1986-04-24 | 1987-11-03 | Journey Electronics Corp. | Glue detection system |
DE3703449C2 (en) * | 1987-02-05 | 1998-07-23 | Truetzschler Gmbh & Co Kg | Device for determining foreign bodies, such as metal parts, wires or the like, within or between textile fiber flakes |
GB8916033D0 (en) * | 1989-07-13 | 1989-08-31 | De La Rue Syst | Sheet inspection apparatus |
DE4130677C2 (en) * | 1991-09-14 | 1995-11-23 | Roland Man Druckmasch | Device for photoelectric monitoring of the run of webs in rotary printing machines |
US5373365A (en) * | 1992-12-23 | 1994-12-13 | Eastman Kodak Company | Apparatus and method for measuring particle contamination |
US5497235A (en) * | 1995-01-12 | 1996-03-05 | Monarch Knitting Machinery Corporation | Inspecting and grading apparatus for hosiery and method of inspecting same |
JP3413310B2 (en) * | 1995-06-09 | 2003-06-03 | 富士写真フイルム株式会社 | Inspection method and apparatus for flexible disk of photographic film cartridge |
US5798531A (en) * | 1996-06-10 | 1998-08-25 | Harris Instrument Corporation | System for detecting small holes in moving articles |
US6075882A (en) * | 1997-06-18 | 2000-06-13 | Philip Morris Incorporated | System and method for optically inspecting cigarettes by detecting the lengths of cigarette sections |
US5966218A (en) * | 1997-07-11 | 1999-10-12 | Philip Morris Incorporated | Bobbin optical inspection system |
US6020969A (en) * | 1997-07-11 | 2000-02-01 | Philip Morris Incorporated | Cigarette making machine including band inspection |
US6198537B1 (en) | 1997-07-11 | 2001-03-06 | Philip Morris Incorporated | Optical inspection system for the manufacture of banded cigarette paper |
DE10233011B4 (en) | 2002-07-20 | 2020-03-19 | Trützschler GmbH & Co Kommanditgesellschaft | Device on a spinning machine for the detection and assessment of textile fiber material |
EP3523634B1 (en) * | 2016-10-06 | 2024-05-15 | Canon Production Printing Holding B.V. | Defect detection for print media |
FI128235B (en) * | 2018-12-10 | 2020-01-15 | Procemex Oy Ltd | Overhead sidelight |
CN112718522B (en) * | 2020-12-03 | 2022-07-12 | 常熟理工学院 | Nickel-titanium wire counting, detecting and laser marking all-in-one machine |
-
1969
- 1969-03-24 GB GB05268/69A patent/GB1217642A/en not_active Expired
- 1969-04-04 FR FR6910542A patent/FR2005765A1/fr not_active Withdrawn
- 1969-04-08 DE DE1917877A patent/DE1917877C3/en not_active Expired
- 1969-04-08 US US814309A patent/US3588513A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3588513A (en) | 1971-06-28 |
FR2005765A1 (en) | 1969-12-19 |
DE1917877C3 (en) | 1974-04-18 |
DE1917877A1 (en) | 1969-11-06 |
GB1217642A (en) | 1970-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
EHJ | Ceased/non-payment of the annual fee |