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11.发明授权Method and apparatus for detecting leaks in buried pipes by using a selected combination of geophysical instruments 失效通过使用地球物理仪器的选定组合来检测埋管中的泄漏的方法和装置公开(公告)号：US06667709B1
公开(公告)日：2003-12-23
申请号：US10341638
申请日：2003-01-14
IPC分类号： G01S302
CPC分类号： G01S13/88 , G01S13/86 , G01S13/885
摘要： A method and apparatus for detecting and locating leaks in buried pipes is disclosed in which ground penetrating radar, induction, acoustic, and vacuum excavation systems are selected based on soil conditions and then employed in selected combinations. The conductivity and wave speed of the soil are used in the selection process and in the process of detecting and locating a leak based on the measurements obtained from the selected combination of detection systems.
摘要翻译： 公开了一种用于检测和定位埋管中泄漏的方法和装置，其中基于土壤条件选择地面穿透雷达，感应，声学和真空挖掘系统，然后以选定的组合使用。 土壤的电导率和波速基于从选定的检测系统组合获得的测量结果在选择过程中和在检测和定位泄漏过程中使用。
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公开(公告)号：US20120322372A1
公开(公告)日：2012-12-20
申请号：US13483241
申请日：2012-05-30
IPC分类号： H04B5/00
CPC分类号： H04B5/0031 , H04B5/0081 , H04K1/02 , H04K3/43 , H04K3/68 , H04K3/825 , H04K2203/34
摘要： Security in inductively coupled communications systems, such as near field communications (NFC), may be improved by restricting signals carrying user data to an authorized data transmission region. Security may be particularly important when the NFC carries financial transaction information or authorization credentials. Scramble signals may be transmitted along with data signals carrying the user data and designed to overshadow the data signals outside of the authorized data transmission region. The scramble signal transceiver may be designed to have a slower decay rate with distance from the transceiver than the data signal. By adjusting the power levels of the scramble signal and the data signal, the authorized data transmission region may be adjusted. Scramble signals may not be required if the data signal strength outside the authorized data transmission region is below the minimum threshold value required by eavesdropping receivers.
摘要翻译： 电感耦合通信系统（例如近场通信（NFC））中的安全性可以通过将承载用户数据的信号限制到授权的数据传输区域来改进。 当NFC携带金融交易信息或授权凭证时，安全性可能尤为重要。 扰频信号可以与携带用户数据的数据信号一起传输，并被设计为遮蔽授权数据传输区域外部的数据信号。 加扰信号收发器可以被设计为具有比数据信号具有比收发器更远的衰减速率。 通过调整加扰信号和数据信号的功率电平，可以调整授权数据传输区域。 如果授权数据传输区域外的数据信号强度低于窃听接收机所需的最小阈值，则可能不需要扰频信号。
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13.发明申请METHOD AND APPARATUS FOR IMPROVING THE EFFICIENCY AND ACCURACY OF RFID SYSTEMS 审中-公开提高RFID系统效率和准确度的方法和装置公开(公告)号：US20090066481A1
公开(公告)日：2009-03-12
申请号：US12270045
申请日：2008-11-13
CPC分类号： G06K7/0008 , G06K7/10079 , H04K3/43 , H04K3/825 , H04K2203/20 , H04K2203/32
摘要： The present invention relates to a method and apparatus for transmitting a narrow signal beam that allows the precise location of RFID tags to be determined and reduces tag collisions. The present invention further relates to a method and apparatus for combing an RFID reader with an optical source to visualize the interrogation zone of the reader. The present invention also relates to a method and apparatus for improving the efficiency of RFID systems.
摘要翻译： 本发明涉及一种用于发送窄信号光束的方法和装置，其允许确定RFID标签的精确定位并减少标签冲突。 本发明还涉及一种用于将RFID读取器与光源组合以使读取器的询问区域可视化的方法和装置。 本发明还涉及一种提高RFID系统效率的方法和装置。
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14.发明授权Time domain induction method and apparatus for locating buried objects in a medium by inducing and measuring transient eddy currents 失效用于通过诱导和测量瞬态涡流来定位介质中的埋藏物体的时域感应方法和装置公开(公告)号：US06949930B2
公开(公告)日：2005-09-27
申请号：US10117133
申请日：2002-04-08
CPC分类号： G01V3/15
摘要： A method and apparatus locates buried objects in conductive soil by creating a direct current in a transmitting loop, periodically terminating the direct current in the transmitting loop to create an eddy current in the conductive soil using time domain induction, receiving a magnetic field resulting from the eddy current running through the conductive soil, and locating the buried object using the received magnetic field.
摘要翻译： 一种方法和装置通过在传输环路中产生直流电而将埋藏物体定位在导电土壤中，周期性地终止传输环路中的直流电流，以便在导电土壤中使用时域感应产生涡流，从而接收由 涡电流穿过导电土壤，并使用接收到的磁场定位被埋物体。
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