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    • 5. 发明申请
    • Thermal Age Tracking System and Method
    • 热年龄跟踪系统和方法
    • US20150142343A1
    • 2015-05-21
    • US14081722
    • 2013-11-15
    • Juergen J. ZachJim BeresErik Olson
    • Juergen J. ZachJim BeresErik Olson
    • G01N27/00G01R31/02G01N25/00
    • G01N27/00G01N25/00G01R31/003G01R31/021G01R31/1272
    • Embodiments of the invention provide systems and methods for tracking the thermal age of a self-regulating heating cable. Over a time period, current and voltage data for a cable signal are collected, from which spectral information is extracted. The spectral information has a frequency component and an amplitude component. The cable signal is processed to extract a line frequency signature that includes the electrical system's line current frequency and at least some of its harmonics. A ratio of the amplitudes of at least two of the odd harmonics of the line current frequency is calculated. The ratio is compared to an aging curve indicating the thermal age of the cable as a function of the odd-harmonic ratios. The curve may be obtained in a laboratory setting or in the field by characterizing a cable with zero hours of use. The characterizing may include aging the cable to determine the curve.
    • 本发明的实施例提供了用于跟踪自调节加热电缆的热寿命的系统和方法。 在一段时间内,收集电缆信号的电流和电压数据,从中提取光谱信息。 频谱信息具有频率分量和振幅分量。 处理电缆信号以提取包括电气系统的线路电流频率和其至少一些谐波的线路频率特征。 计算线路电流频率的至少两个奇次谐波的振幅比。 将该比率与表示电缆的热寿命作为奇次谐波比的函数的老化曲线进行比较。 曲线可以在实验室设置中或在现场通过使用零小时的电缆进行表征来获得。 特征可能包括老化电缆以确定曲线。
    • 6. 发明授权
    • Network access control
    • 网络访问控制
    • US08438619B2
    • 2013-05-07
    • US11859336
    • 2007-09-21
    • Erik Olson
    • Erik Olson
    • G06F7/00
    • H04L63/1416G06F21/577
    • An system for controlling access to a network by a user device. The system includes a criteria engine that generates a plurality of criteria to be monitored on the user device and a checker that generates at least one check for each of the plurality of criteria. The system further includes a profiler that retrieves a profile for the user device, the profile including the plurality of criteria and the at least one check for each of the plurality of criteria, a comparator that compares a summary of the retrieved profile to a summary of a profile received from the user device and a communicator that communicates a message to the user device based on the comparison.
    • 用于由用户设备控制对网络的访问的系统。 系统包括标准引擎,其生成要在用户设备上监视的多个准则;以及检查器,其生成针对多个标准中的每一个的至少一个检查。 所述系统还包括分析器,所述分析器检索所述用户设备的简档,所述简档包括所述多个标准和所述多个标准中的每一个的所述至少一个检查;比较器,将所检索的简档的摘要与 从用户设备接收的简档和基于该比较将消息传达到用户设备的通信器。