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公开(公告)号：US06611198B1
公开(公告)日：2003-08-26
申请号：US09411141
申请日：1999-10-01
IPC分类号： H04Q522
CPC分类号： G06K7/0008
摘要： An object identification system and method detects the presence of a target object in a field of inspection and in one aspect of the invention, generates a first signal if the object is left in the field of inspection for more than a minimum threshold period of time. In a second aspect a second signal is generated if the object is introduced to the field of inspection more than a minimum threshold number of times (having been withdrawn from the field of inspection in the interim) within a minimum threshold period of time.
摘要翻译： 对象识别系统和方法在检查领域中检测目标对象的存在，并且在本发明的一个方面中，如果对象在检查领域中留下超过最小阈值时间段，则产生第一信号。 在第二方面，如果在最小阈值时间段内将对象引入检查领域超过最小阈值次数（已经从中期的检查领域中撤出），则产生第二信号。
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公开(公告)号：US06411199B1
公开(公告)日：2002-06-25
申请号：US09138589
申请日：1998-08-21
IPC分类号： H04Q522
CPC分类号： G06K7/0008
摘要： A radio frequency identification system includes a transponder and a transponder reader. The transponder, responsive to an interrogation signal continuously transmitted by the transponder reader, generates a transponder signal modulated by an identification signal readable by the transponder reader. The identification signal includes a synchronization portion, a data portion, an output format identification portion, and an error detection portion. The output format identification portion is used by the reader to configure itself for communication with an attached controller. In another aspect of the invention, the transponder reader may be configured to read FSK as well as PSK encoded signals from the transponder.
摘要翻译： 射频识别系统包括应答器和应答器读取器。 应答器响应于由应答器读取器连续发送的询问信号，生成由应答器读取器可读取的识别信号调制的应答器信号。 识别信号包括同步部分，数据部分，输出格式识别部分和错误检测部分。 读取器使用输出格式识别部分来配置自身以与附接的控制器进行通信。 在本发明的另一方面，应答器读取器可以被配置为从应答器读取FSK以及PSK编码的信号。
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