公开(公告)号：US06317049B1

公开(公告)日：2001-11-13

申请号：US09227624

申请日：1999-01-08

申请人： Souhail Toubia ,  John S. Browning

发明人： Souhail Toubia ,  John S. Browning

IPC分类号： G08B2300

CPC分类号： G08B21/0211 ,  G01S5/10 ,  G01S13/878 ,  G08B21/023 ,  G08B21/028 ,  G08B21/0288 ,  G08B21/0294

摘要： A micropower transponder operates in conjunction with a constellation of low-to-medium Earth-orbiting communication satellites. The transponder is attached to a person, animal, or object. The location of a missing person, animal, or lost object is ascertained by locating the transponder associated with that person, animal, or object. The transponder may be hidden in the individual's hair, timepiece, jewelry, or article of clothing; may be swallowed by the individual; may be implanted under the individual's skin; or incorporated into an inconspicuous hand-held device such as a cellular telephone, pager, or calculator. The transponder includes a receiver for receiving an interrogation radio signal and a transmitter for transmitting a response radio signal. The transponder transmits the response radio signal in response to the interrogation radio signal if the interrogation radio signal includes a code matching the access code stored in the transponder. The Doppler shift in frequency of the response radio signal is measured and the Doppler shift is used to determine the location of the transponder.

摘要翻译： 微功率转发器与低到中等地球轨道通信卫星的星座一起运行。 转发器附着在人，动物或物体上。 通过找到与该人，动物或物体相关联的应答器来确定失物人，动物或遗失物体的位置。 转发器可能隐藏在个人的头发，钟表，首饰或衣物上; 可能被个体吞噬; 可以植入人的皮肤下; 或者并入到诸如蜂窝电话，寻呼机或计算器之类的不显眼的手持设备中。 应答器包括用于接收询问无线电信号的接收机和用于发送响应无线电信号的发射机。 如果询问无线电信号包括与存储在应答器中的访问码匹配的代码，则应答器响应于询问无线电信号而发送响应无线电信号。 测量响应无线电信号的频率的多普勒频移，并使用多普勒频移来确定应答器的位置。