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1. 发明申请

WO2015073584A1 THERMAL AGE TRACKING SYSTEM AND METHOD 审中-公开
标题翻译：热老化追踪系统及方法
公开(公告)号：WO2015073584A1
公开(公告)日：2015-05-21
申请号：PCT/US2014/065298
申请日：2014-11-12
申请人： PENTAIR THERMAL MANAGEMENT LLC
发明人： ZACH, Juergen, J. , BERES, James, F. , OLSON, Erik
IPC分类号： H02H3/00
CPC分类号： G01N27/00 , G01N25/00 , G01R31/003 , G01R31/021 , G01R31/1272
摘要： 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.
摘要翻译：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。

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