EP1064624A1 - Verfahren zur überprüfung des zustandes einer vorrichtung zur prüfung von blattgut - Google Patents
Verfahren zur überprüfung des zustandes einer vorrichtung zur prüfung von blattgutInfo
- Publication number
- EP1064624A1 EP1064624A1 EP00902599A EP00902599A EP1064624A1 EP 1064624 A1 EP1064624 A1 EP 1064624A1 EP 00902599 A EP00902599 A EP 00902599A EP 00902599 A EP00902599 A EP 00902599A EP 1064624 A1 EP1064624 A1 EP 1064624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- measuring window
- filter
- detector
- window
- 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
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 239000004904 UV filter Substances 0.000 claims abstract description 9
- 238000005286 illumination Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 17
- 238000011109 contamination Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 238000011156 evaluation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
Definitions
- the invention relates to a method for checking the state of a device for checking sheet material, which has at least one lighting device, a translucent measuring window and a detector.
- a device of the type mentioned above is e.g. known from W098 / 26276.
- the light emitted by an illuminating device strikes the sheet material to be tested through a transparent measuring window.
- the light remitted by the sheet material is then detected and evaluated.
- the known test device for sheet material has the problem that the measuring window can become dirty during operation. If the measuring window is dirty, e.g. less light from the irradiation device to the sheet material to be tested, as a result of which the measurement signal drops.
- the sheet material it cannot be determined whether the weaker measurement signal is due to contamination of the measuring window or the condition of the sheet material to be checked. As a result, the sheet material to be tested can be incorrectly assessed due to the soiling of the measuring window. This affects the reliability when checking sheet material.
- the invention is based on the object of proposing a method and a device for checking the state of a testing device for sheet material, which enables the detection of contaminations affecting the measurement in a measuring window of the testing device with little technical effort.
- the object is achieved by the features specified in the independent claims.
- the invention in order to detect contamination in a measuring window, this is irradiated with UV light by an illuminating device, the UV light transmitted through the measuring window being filtered by a UV filter in such a way that only a small proportion passes through the filter and to a detector is let through. This portion of the UV light transmitted through the filter is detected and evaluated to determine the degree of contamination of the measuring window.
- the evaluation is preferably carried out in such a way that an illumination profile is recorded and stored for a clean measurement window, which is compared with the illumination profile currently obtained from the detected signal.
- the degree of contamination of the measurement window can be determined on the basis of the deviation of the lighting profile currently recorded from the stored lighting profile. Instead of lighting profiles, however, the integrated measured values can also be compared with one another. In both cases, a deviation indicates that the measuring window is dirty.
- the sensitivity of the detector is preferably increased, for example, by extending the integration time or also the light intensity of the lighting device or the signal amplification compared to normal operation when checking the sheet material.
- Figure 1 shows the functional principle of checking the state of a
- FIG. 2 shows an exemplary embodiment of a device with detectors on both sides.
- FIG. 1 shows an example in a schematic representation of the functional principle for the detection of contamination in a measuring window.
- the measurement window 2 is irradiated with UV light 5 by an illumination device, for example by two UV lamps 1.
- the UV light 5 transmitted through the measuring window is filtered by means of a UV filter 3 in such a way that only a small proportion 6 of the UV light 5 reaches a detector 4. Only this portion of the UV light is detected and evaluated to determine the degree of contamination of the measuring window.
- the current measured value is compared with a stored reference value which is obtained with a clean measuring window. The comparison can take place on the basis of the integrated measured values or also on the basis of the recorded lighting profiles in certain cycles which depend on the operating time.
- FIG. 2 shows a device for checking sheet material, in particular bank notes, in which, for example, two measuring windows 2 are provided, which are arranged at a distance from one another.
- An illumination device 1, for example in the form of two UV lamps 1, is assigned to each measurement window.
- the banknote transported between the measuring windows 2 and not shown here is excited, for example during the authenticity check, on both sides with UV light, the light reflected from the banknote on each side being detected by a detector 4 in each case.
- banknotes emit light in the visible wavelength range when excited by UV light, which among other things represents a criterion for the authenticity of the banknotes.
- a UV filter 3 is arranged in front of the detectors 4, by means of which the measurement signal of the banknote is not impaired, however, since the filters 3 transmit the light remitted by the banknote in the visible wavelength range.
- the status of the measuring windows is preferably checked by irradiating the measuring windows 2 on both sides by means of the UV light 5 emitted by the lighting devices 1 in each case.
- the UV light 5 transmitted through the measuring window 2 is filtered by the filters 3 such that only a small amount Part 6, which is for example a few percent, is passed to the detectors 4.
- the portion 6 of the UV light 5 transmitted through the filter 3 is detected and evaluated to determine the degree of contamination of the measuring window.
- they can also be irradiated with UV light from only one side, as has already been described in connection with FIG. 1.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Continuous Casting (AREA)
- Manufacture Of Motors, Generators (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19901702A DE19901702A1 (de) | 1999-01-18 | 1999-01-18 | Verfahren zur Überprüfung des Zustandes einer Vorrichtung zur Prüfung von Blattgut |
DE19901702 | 1999-01-18 | ||
PCT/EP2000/000315 WO2000042578A1 (de) | 1999-01-18 | 2000-01-17 | Verfahren zur überprüfung des zustandes einer vorrichtung zur prüfung von blattgut |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1064624A1 true EP1064624A1 (de) | 2001-01-03 |
EP1064624B1 EP1064624B1 (de) | 2002-10-09 |
Family
ID=7894573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00902599A Expired - Lifetime EP1064624B1 (de) | 1999-01-18 | 2000-01-17 | Verfahren zur überprüfung des zustandes einer vorrichtung zur prüfung von blattgut |
Country Status (7)
Country | Link |
---|---|
US (1) | US6472670B1 (de) |
EP (1) | EP1064624B1 (de) |
AT (1) | ATE225971T1 (de) |
AU (1) | AU2437700A (de) |
DE (2) | DE19901702A1 (de) |
ES (1) | ES2180510T3 (de) |
WO (1) | WO2000042578A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0028263D0 (en) * | 2000-11-20 | 2001-01-03 | Rue De Int Ltd | Document handling apparatus |
DE10160578A1 (de) * | 2001-12-10 | 2004-02-12 | Giesecke & Devrient Gmbh | Verfahren und Vorrichtung für die Überprüfung der Echtheit von Blattgut |
DE102010055428A1 (de) * | 2010-12-21 | 2012-06-21 | Giesecke & Devrient Gmbh | Verschmutzungsprüfung des Fensters einer Messvorrichtung zur Prüfung von Blattgut |
DE102011109400B4 (de) | 2011-08-04 | 2015-12-24 | Giesecke & Devrient Gmbh | Banknotenbearbeitungsmaschine |
DE102011116487A1 (de) * | 2011-10-20 | 2013-04-25 | Giesecke & Devrient Gmbh | Verschmutzungsprüfung des Fensters einer Messvorrichtung |
WO2024020305A2 (en) * | 2022-07-18 | 2024-01-25 | Siemens Healthcare Diagnostics Inc. | Analyzer having a transparent shield for protecting an imaging system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3755674A (en) * | 1972-03-09 | 1973-08-28 | Columbia Res Corp | Method of detecting pinhole defects in sheet material |
US4114804A (en) | 1976-08-04 | 1978-09-19 | Brandt-Pra, Inc. | Counterfeit detection means for paper counting |
CH622369A5 (de) * | 1978-04-18 | 1981-03-31 | Radioelectrique Comp Ind | |
JPS57113351A (en) * | 1980-11-19 | 1982-07-14 | Apuraido Kuromatogurafuii Syst | Detector for compounds separated with chromatography apparatus |
US4560874A (en) * | 1981-06-02 | 1985-12-24 | Santa Barbara Research Center | Reference channel for sensing optical contamination |
AU556102B2 (en) * | 1981-10-22 | 1986-10-23 | Cubic Western Data | Currency note validator |
GB2109923B (en) | 1981-11-13 | 1985-05-22 | De La Rue Syst | Optical scanner |
DE3816943A1 (de) * | 1988-05-18 | 1989-11-30 | Nixdorf Computer Ag | Verfahren zum pruefen von blattmaterial |
DE4022020A1 (de) * | 1990-07-11 | 1992-01-16 | Gao Ges Automation Org | Vorrichtung und verfahren zur pruefung von dokumenten |
US5578828A (en) * | 1994-11-15 | 1996-11-26 | General Electric Company | Flame sensor window coating compensation |
DE19651101A1 (de) * | 1996-12-09 | 1998-06-10 | Giesecke & Devrient Gmbh | Vorrichtung und Verfahren zur Detektion von fluoreszentem und phosphoreszentem Licht |
US5812270A (en) * | 1997-09-17 | 1998-09-22 | Ircon, Inc. | Window contamination detector |
-
1999
- 1999-01-18 DE DE19901702A patent/DE19901702A1/de not_active Withdrawn
-
2000
- 2000-01-17 ES ES00902599T patent/ES2180510T3/es not_active Expired - Lifetime
- 2000-01-17 AT AT00902599T patent/ATE225971T1/de not_active IP Right Cessation
- 2000-01-17 EP EP00902599A patent/EP1064624B1/de not_active Expired - Lifetime
- 2000-01-17 AU AU24377/00A patent/AU2437700A/en not_active Abandoned
- 2000-01-17 US US09/623,492 patent/US6472670B1/en not_active Expired - Lifetime
- 2000-01-17 WO PCT/EP2000/000315 patent/WO2000042578A1/de active IP Right Grant
- 2000-01-17 DE DE50000614T patent/DE50000614D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0042578A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6472670B1 (en) | 2002-10-29 |
DE50000614D1 (de) | 2002-11-14 |
ES2180510T3 (es) | 2003-02-16 |
EP1064624B1 (de) | 2002-10-09 |
ATE225971T1 (de) | 2002-10-15 |
AU2437700A (en) | 2000-08-01 |
DE19901702A1 (de) | 2000-07-20 |
WO2000042578A1 (de) | 2000-07-20 |
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