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CN107942198A 一种基于阻抗频谱分析的电缆局部缺陷评估的装置和方法 无效 - 驳回

一种基于阻抗频谱分析的电缆局部缺陷评估的装置和方法
摘要：
本发明涉及传输线阻抗频谱的测量与分析技术领域，具体涉及一种基于阻抗频谱分析的电缆局部缺陷评估的装置和方法，所述装置至少包括信号发生单元、信号采集单元、分析控制单元和数据存储单元，信号发生单元用于向被测电缆的一端发射入射信号以及用于发射参考信号，所述入射信号和所述参考信号具有相同的幅值和相位；所述信号采集单元用于同步的采集所述入射信号和反射信号，所述反射信号为由所述入射信号经过被测电缆后反射的信号，本发明通过扫频方法测量并计算扫频段内被测电缆阻抗的频谱，并在频域内对谱函数进行变换，在变换后的新域中实现对缺陷的定位并评估其严重程度，本发明与现有的电缆故障定位技术相比，抗噪性强、适用性广、可实现定量评估。
摘要（英）：

The invention relates to the technical field of measurement and analysis of a transmission line impedance spectrum, and particularly relates to a device and a method for evaluating a local defect of acable based on impedance spectrum analysis. The device at least includes a signal generation unit, a signal acquisition unit, an analysis control unit and a data storage unit. The signal generation unit is for transmitting an incident signal to one end of a cable being tested and for transmitting a reference signal, the incident signal and the reference signal are the same in amplitude and phase,the signal acquisition unit is used for synchronous acquisition of the incident signal and a reflected signal, and the reflected signal is a signal which is generated when the incident signal is reflected after passing through the cable being tested. According to the method, the impedance spectrum of the cable being tested in a frequency sweeping band is measured and calculated via a frequency sweeping method, a spectrum function is transformed in a frequency domain, defects can be located in a new transformed domain, and evaluate severity of the defects can be evaluated. Compared with conventional cable fault positioning technologies, the device and the method disclosed in the present invention are advantaged by strong noise immunity, wide range of application, and capability of quantitative evaluation.

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