JPS649589A - Sheet paper detector - Google Patents
Sheet paper detectorInfo
- Publication number
- JPS649589A JPS649589A JP62165856A JP16585687A JPS649589A JP S649589 A JPS649589 A JP S649589A JP 62165856 A JP62165856 A JP 62165856A JP 16585687 A JP16585687 A JP 16585687A JP S649589 A JPS649589 A JP S649589A
- Authority
- JP
- Japan
- Prior art keywords
- slice
- infrared
- infrared ray
- coarseness
- fineness
- 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
- Conveying Record Carriers (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
PURPOSE: To exactly and surely recognize a watermark prepared by the coarseness and fineness of fibers by automatically slicing transmitted light with slice data corresponding to change in the transmitted light of infrared rays caused by the coarseness/fineness of fibers consisting of paper sheets. CONSTITUTION: This device has an infrared ray radiating mean 1 for irradiating paper sheets P with infrared rays, an infrared ray detecting means 2 for detecting light transmitted from the papery sheets P by this infrared ray radiating means 1, a slice data preparing means 10 for preparing the slice data from the output signal of this infrared light detecting means and a slice means 10 for slicing the output signal of the infrared ray detecting means corresponding to the slice date prepared by this slide data preparing means. Namely, when the paper money P is conveyed between the radiator 1 and the infrared sensor 2, a CPU 10 generates a timing signal corresponding to the section of bar watermark part and slices normalized data according to a slice level. From the sliced result of this slice means, the watermark prepared by the coarseness/fineness of fibers can be exactly and surely recognized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62165856A JPS649589A (en) | 1987-07-02 | 1987-07-02 | Sheet paper detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62165856A JPS649589A (en) | 1987-07-02 | 1987-07-02 | Sheet paper detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS649589A true JPS649589A (en) | 1989-01-12 |
Family
ID=15820295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62165856A Pending JPS649589A (en) | 1987-07-02 | 1987-07-02 | Sheet paper detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS649589A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0480893A (en) * | 1990-07-24 | 1992-03-13 | Kiwa Ishiwatari | Counterfeit paper money discriminating device |
WO2003077187A1 (en) | 2002-03-11 | 2003-09-18 | Digital Verification Ltd. | Currency verification |
-
1987
- 1987-07-02 JP JP62165856A patent/JPS649589A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0480893A (en) * | 1990-07-24 | 1992-03-13 | Kiwa Ishiwatari | Counterfeit paper money discriminating device |
WO2003077187A1 (en) | 2002-03-11 | 2003-09-18 | Digital Verification Ltd. | Currency verification |
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