JPS57199972A - Detector for metallic piece present in paper or the like - Google Patents
Detector for metallic piece present in paper or the likeInfo
- Publication number
- JPS57199972A JPS57199972A JP56084314A JP8431481A JPS57199972A JP S57199972 A JPS57199972 A JP S57199972A JP 56084314 A JP56084314 A JP 56084314A JP 8431481 A JP8431481 A JP 8431481A JP S57199972 A JPS57199972 A JP S57199972A
- Authority
- JP
- Japan
- Prior art keywords
- metallic piece
- paper
- magnetic
- detector
- present
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
-
- 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
- G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Environmental & Geological Engineering (AREA)
- Electromagnetism (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
PURPOSE:To detect a metallic piece effectively used to discriminate between the truth and fasehood of paper, etc., by detecting variation in resistance value of a magnetic resistance element with a magnetic field which varies when the metallic piece present in the paper, etc., passes in magnetic flux. CONSTITUTION:When paper currency P wherein a metallic piece 2 is present is carried and passed between detection heads 41 and 42, the distribution of a magnetic field 7 by permanent magnets 51 and 52 varies and the resistance values of magnetic resistance elements 61 and 62 also vary. Consequently, even when the metallic piece 2 is a magnetic material, its presence is detected securely.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56084314A JPS57199972A (en) | 1981-06-03 | 1981-06-03 | Detector for metallic piece present in paper or the like |
US06/336,684 US4518919A (en) | 1981-01-16 | 1982-01-04 | Detecting device for detecting a magnetic strip embedded in a sheet |
AT82300197T ATE26353T1 (en) | 1981-01-16 | 1982-01-14 | DEVICE FOR DETECTING A MAGNETIC STRIP INSERTED IN PAPER. |
EP82300197A EP0057520B1 (en) | 1981-01-16 | 1982-01-14 | A device for detecting a magnetic strip embedded in paper |
DE8282300197T DE3275957D1 (en) | 1981-01-16 | 1982-01-14 | A device for detecting a magnetic strip embedded in paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56084314A JPS57199972A (en) | 1981-06-03 | 1981-06-03 | Detector for metallic piece present in paper or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57199972A true JPS57199972A (en) | 1982-12-08 |
Family
ID=13827039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56084314A Pending JPS57199972A (en) | 1981-01-16 | 1981-06-03 | Detector for metallic piece present in paper or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57199972A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017036984A (en) * | 2015-08-10 | 2017-02-16 | セイコーNpc株式会社 | Magnetic sensor device |
-
1981
- 1981-06-03 JP JP56084314A patent/JPS57199972A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017036984A (en) * | 2015-08-10 | 2017-02-16 | セイコーNpc株式会社 | Magnetic sensor device |
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