发明名称 |
Process and apparatus for identifying coins. |
摘要 |
<p>When an electrically conducting material is subjected to an alternating magnetic field local changes in the magnetic field adjacent to the conducting material are detected by a detector comprising a magnetoresistor or Hall crystal which generate an electrical signal when subjected to the magnetic field. The process and apparatus can be used to identify, classify and locate electrically conducting material.</p><p>The detectors can be of the order of a few millimeters in size and so can be used to detect local changes in the magnetic field over correspondingly small areas of the material.</p><p>The invention is particularly useful in identifying coins used in coin operated machines.</p> |
申请公布号 |
EP0076617(A2) |
申请公布日期 |
1983.04.13 |
申请号 |
EP19820305086 |
申请日期 |
1982.09.27 |
申请人 |
UNIVERSITY COLLEGE CARDIFF CONSULTANTS LTD. |
发明人 |
COLLINS, ALAN JOHN, DR.;HUSNI, MAZEN RASEKH |
分类号 |
G07D5/08;G01N27/72;G01R33/12;(IPC1-7):07F3/02;07D5/08 |
主分类号 |
G07D5/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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