摘要
传感器的性能对准确高效地获取故障行波信号具有重要影响,为研究不同材质非接触式电压传感器的传变特性,首先对采集的信号用小波包能量谱法进行小波包分解,利用MATLAB软件拟合得到不同材质传感器采集信号的能量在相同频段的不同衰减规律,分析传感器传变特性;其次使用MATLAB工具编写入射波脉宽计算程序,根据脉宽值判断采集波形的明显程度以及原始信号幅值衰减速度判断信号采集的难易;最后从定位误差的角度分析定位的准确度;结果表明,镁材质金属片在行波测距中传变特性较好,可为传感器材质的选择及设计提供重要参考。
Sensor performance has an important impact on accurate and efficient acquisition of traveling wave fault signals,to study the transmission characteristics of non-contact voltage sensors of different materials,Firstly,wavelet packet decomposition is performed on the acquired signal by wavelet packet energy spectrum method,Using matlab software to fit the different attenuation laws of the energy collected by different material sensors in the same frequency band to analyze sensor transfer characteristics;Secondly, using the matlab tool to write the calculation program of the incoming wave pulse width, judging the obvious degree of the acquired waveform according to the pulse width value and the attenuation of the original signal amplitude to judge the difficulty of signal acquisition;Finally, the accuracy of the positioning is analyzed from the perspective of positioning error;In summary, the magnesium metal sheet has good transfer characteristics in traveling wave ranging. This can provide an important reference for the selection and design of sensor materials.
作者
廖芳
汪志成
Liao Fang;Wang Zhicheng(Department of Mechanical and Electronic Engineering,East China University of Technology,Nanchang 330013,China)
出处
《电子测量技术》
2019年第1期68-72,共5页
Electronic Measurement Technology
关键词
非接触
行波传感器
不同材料
故障测距
传变特性
non-contact
travel wave sensor
different materials
fault location
transmission characteristics
