发明名称 |
Reader system for waste bin pickup vehicles |
摘要 |
A reader for radio frequency identification tags having at least one magnetic field transmitting and receiving coil which is oriented in a given plane and which is responsive to a received magnetic exciter field of a first frequency to produce and radiate an identifying magnetic field comprised of a carrier at a second different frequency modulated by an identifying code. The reader comprises a first circuit for producing a radio frequency signal of the first frequency; a first magnetic field coupling arrangement connected to the output of said first circuit for producing a corresponding exciter field at the first frequency to be magnetically coupled to the receiving coil of the tag, with the first magnetic field coupling arrangement including a solenoidal exciter coil having at least one wound exciter winding and a longitudinal axis disposed substantially perpendicular to the plane of the tag coil; a second magnetic field coupling arrangement for receiving a magnetic field of the second frequency produced by the tag and providing a corresponding electrical signal, with the second magnetic field coupling arrangement including at least one receiver coil disposed adjacent one end of the solenoidal coil; and circuitry connected to the receiver coil for decoding the received electrical signal. Preferably the tag is disposed on the lid of a trash or waste bin with the tag coil being substantially horizontal and the axis of the exciter coil is disposed substantially vertically.
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申请公布号 |
US5565846(A) |
申请公布日期 |
1996.10.15 |
申请号 |
US19940312199 |
申请日期 |
1994.09.26 |
申请人 |
INDALA CORPORATION |
发明人 |
GEISZLER, THEODORE D.;EBERHARDT, NOEL H.;WALKER, RUSSEL E.;RADDING, HERBERT P. |
分类号 |
B65F1/14;B65F3/02;G06K7/08;(IPC1-7):G08G13/14 |
主分类号 |
B65F1/14 |
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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