FIELD: radio engineering. SUBSTANCE: given verifier includes winding which is fed with alternating current to create uniform magnetic field within bounds of spatial zone determined beforehand. When document is passed in close proximity of excitation winding applied magnetic field saturates zones of magnetic material on protective strip. Magnetic zones form responding magnetic field that is magnetic field with nonlinear characteristics having component with basic frequency and various harmonic frequency components. Reading winding detects responding magnetic field. Signal processor coupled to reading winding uses responding signals with basic frequency and frequencies of harmonics to determine merits of document. EFFECT: verification of authenticity and/or merits of monetary documents. 17 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PROTECTIVE FIBER, DOCUMENT PROTECTED BY SUCH FIBER, PROTECTED DOCUMENT MANUFACTURE METHOD AND METHOD FOR CONTROLLING AUTHENTICITY AND READ-OUT OF CODED INFORMATION OF PROTECTED DOCUMENT | 1995 |
|
RU2114743C1 |
| MEANS OF PROTECTION AND FORGERY-PROTECTED OBJECTS USING IT | 2005 |
|
RU2349698C2 |
| IMPROVED PROTECTION DEVICE | 2004 |
|
RU2316050C2 |
| IMAGES PROTECTED AGAINST FORGERY AND SHAPED WITH METAL, AND ALSO PROTECTION DEVICES AND DOCUMENTS PROTECTED WITH THEIR HELP | 2005 |
|
RU2341379C2 |
| DURABLE DEVICES FOR ENSURING PROTECTION FROM FALSIFICATION AND VALUABLE PRODUCTS, PROTECTED FROM FALSIFICATION, WHICH USE SUCH DEVICES | 2003 |
|
RU2322357C2 |
| MICROOPTICAL FILM STRUCTURE, WHICH INDIVIDUALLY OR JOINTLY WITH SECURED DOCUMENT OR LABEL PROJECTS IMAGES, WHICH ARE SPATIALLY COORDINATED WITH STATIC IMAGES AND/OR OTHER PROJECTED IMAGES | 2007 |
|
RU2420411C2 |
| PROTECTIVE DEVICE HAVING MULTIPLE DETECTABLE PROTECTIVE ELEMENTS | 2002 |
|
RU2271575C2 |
| METHOD FOR CONTROLLING DOCUMENTS COUNTING PROCEDURE, METHOD FOR CHECKING DOCUMENTS, DEVICE FOR SEPARATION OF DOCUMENTS, DEVICE FOR CHECKING DOCUMENTS AND CONTROL METHOD | 1993 |
|
RU2144697C1 |
| METHOD FOR PROTECTION FROM FORGERY AND AUTHENTICITY CONTROL OF VALUABLE PRODUCTS | 2004 |
|
RU2276409C2 |
| PROTECTIVE ELEMENT FOR AUTHENTICATING SECURITY OBJECT AND AUTHENTICATION METHOD | 2009 |
|
RU2406152C1 |
