基于三点插值FFT的电力电缆缺陷反射系数估计方法
By using a three-point interpolation FFT method, the spectral peaks and adjacent points in the frequency domain are accurately analyzed, solving the problem of difficulty in estimating the reflection coefficient of defects in long power cables. This method achieves accurate estimation of defect location and reflection coefficient with an error of less than 10%.
CN117310368BActive Publication Date: 2026-07-17SICHUAN UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN UNIV
- Filing Date
- 2023-09-10
- Publication Date
- 2026-07-17
Smart Images
Figure CN117310368B_ABST
Abstract
本发明属于电力电缆检测技术领域，公开了基于三点插值FFT的电力电缆缺陷反射系数估计方法，首先提取被测电缆传递函数的实部，并转换至频域；搜索所有畸变处谱峰；提取频域下各谱峰幅值、左右两侧相邻点的幅值，并计算得到频率偏移量和衰减因子；然后估计时域下各谱峰的幅值和相位；最后确定缺陷位置及其反射系数。本发明能够实现对幅值和相位的解耦，以消除各缺陷之间反射系数的相互影响，有效估计缺陷位置的反射系数。
Need to check novelty before this filing date? Find Prior Art