JPS649589A - Sheet paper detector - Google Patents

Sheet paper detector

Info

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
Application number
JP62165856A
Other languages
Japanese (ja)
Inventor
Hidekatsu Uchida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
Original Assignee
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Intelligent Technology Co Ltd filed Critical Toshiba Corp
Priority to JP62165856A priority Critical patent/JPS649589A/en
Publication of JPS649589A publication Critical patent/JPS649589A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Conveying Record Carriers (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.
JP62165856A 1987-07-02 1987-07-02 Sheet paper detector Pending JPS649589A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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