CN2399784Y

CN2399784Y - Discriminating tech. for concealed digits of RMB

Info

Publication number: CN2399784Y
Application number: CN99253974U
Authority: CN
Inventors: 张汉昭
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-13
Filing date: 1999-12-13
Publication date: 2000-10-04
Anticipated expiration: 2009-12-13

Abstract

The utility model relates to a falseness discrimination technology for discriminating a concealed number of RMB, which belongs to the technical field of the RMB falseness discrimination. The technology solves the problem that the concealed face value number '100' of the new edition RMB can not be discriminated with a current instrument. The utility model has the main technology characteristics that as a picture is shown, a main body is an image displaying observation system which is composed of five optical elements, and when the concealed number is positioned below a grating sheet 2, one side of the grating sheet can display out the concealed '100' sample. Parasitic light is leached by a polarizer, an observer can conveniently observe the clear '100' sample on the distance of distinct vision of a convex lens 5. The technology can be directly used for various bank note checking instruments and is added with a camera head and a simple computer image discrimination software to make a bank note counting machine have function of discriminating the concealed number.

Description

Can discern the authentication detection technology of the stealthy numeral of Renminbi

The utility model relates to a kind of authentication detection technology of discerning the stealthy denomination numeral of new edition Renminbi, belongs to Renminbi authentication detection technology field.

Relevant Renminbi authentication detection technology of announcing according to Chinese patent literature and commercially available various detect counterfeit money machine, paper money counter etc. are not all found the method for the stealthy numeral of available instrument identification.Played the standard GB 16999-1997 " Renminbi discriminating machine for fake RMB " of enforcement on July 1st, 1998, nine kinds of identification methods in distinguishing ability, stipulating, not useful instrument is differentiated the method for stealthy numeral.

Behind 99 editions note-issues, People's Bank of China is in the bulletin of " brief introduction of 100 yuan of volumes of the 5th cover Renminbi anti-counterfeiting characteristic ", recognition methods to stealthy denomination numeral is: " banknote being placed and the approaching parallel position of eyes; do rotation 45 degree or 90 ° of angles in the face of light source, can see denomination " 100 " printed words ".This method both had been subjected to the influence of light source direction, power, also was subjected to the restriction of observer individual eyesight quality, educational level height, through field test, had about 20 percent people erroneous judgement to occur.

The purpose of this utility model is exactly to solve the action complexity that exists in the artificial cognition, the problem of poor reliability, by certain optical systems, clear showing " 100 " printed words, can accurately assert having or not of " 100 " rapidly.

For achieving the above object, the axial section of main body such as accompanying drawing 1, the present technique main body constitutes the video picture recording geometry by other part of five optics, with have on the bank note stealthy numeral that when placing under the lenticular lenses 2, under the irradiation of EL sheet 3, the lenticular lenses another side can manifest stealth " 100 ", and this is the phenomenon that reflection of light, interference cause.By lenticular lenses 2, can become " 100 " that directly can face facing to the contrary just visible stealthy numeral " 100 " of looking of light source; But this only is preliminary imaging; Need polariscope 4 eliminations variegated, make imaging clear; For the ease of on the distance of distinct vision (about 25 centimeters) conveniently see " 100 ", special settle the convex lens 5 that amplify more than ten times at the lens barrel other end behind the polariscope, utilize this mirror, also can see microfilm of characters RMB, at one stroke two.

The utility model is compared with existing recognition methods, has to operate rapid, the reliable advantage of recognition result, and be after methods such as fluorescence, magnetic, watermark, the false distinguishing means that another is important.Present technique has the printed matter of stealthy literal (as bill, diploma etc.) that recognition capability is arranged equally to other.

The drawing of accompanying drawing is described as follows: as Fig. 1, lens barrel 1 is by the opaque-plastic compression molding, and about 3 centimetres of axial length is fixed with EL sheet 3 on the hydraucone inwall of one end, and light tiles is joined with the tube external circuit, and circuit theory as shown in Figure 3; The lens barrel hydraucone is sealed fixing by lenticular lenses 2, lenticular lenses is by the moulding of half transmitting plastic mould pressing, and one side is the plane, and another side then is made of the series of parallel curved surface, sectional drawing such as Fig. 2.Illustrate that lenticular lenses 2 is different from optic spectro-grating.Latter's groove gathers (every millimeter over thousands of), costs an arm and a leg the lenticular lenses in the utility model, the width of each little curved surface equates that according to the requirement of imaging definition, width range can be between 0.1 millimeter to 0.5 millimeter, such grating is made easily, and cost is extremely low; As Fig. 1, polariscope 4 and convex lens 5 all are fixed on the lens barrel, minute surface and lens barrel axis normal.Mirror-making material does not have specific (special) requirements, polariscope in addition than commercially available quality lower more also can, the common magnifier of magnifier.

Device described in the utility model can be placed in easily on existing portable, the desk-top cash inspecting machine, and not take twists and turns; As being used for paper money counter, then before camera, add lenticular lenses, polariscope, form a photoelectric probe, utilize image recognition software again, can judge having or not of " 100 ".Because of identification only has or not " 100 ", image is very simple, and software is just fairly simple, in thousand yuan, can make paper money counter possess the new function of the stealthy denomination numeral of identification, improves false distinguishing reliability and technical grade.

Claims

1, the authentication detection technology that can discern the stealthy numeral of Renminbi is characterized in that: main body is formed the video picture recording geometry by other part of five optics, and lenticular lenses is to the positive surface imaging of stealthy numeral; Polariscope elimination veiling glare; Magnifier is convenient to distance of distinct vision observation; EL sheet provides illumination, and this system has the function of the stealthy numeral of direct observation.

2, video picture recording geometry according to claim 1, it is characterized in that: lenticular lenses has given shape, it simultaneously is the plane, another side is rearranged by the series of parallel curved surface, each little curved surface width is identical, numerical range is at 0.1mm～0.5mm, and lenticular lenses is by the moulding of half transmitting plastic mould pressing, and the special lenticular lenses of this kind can make the positive video picture of the invisible symbol of printed matter.