The Allan variance analysis method is used to identify the stochastic noise in the stray current sensor. The stray current characteristic is firstly introduced. Then the optical configuration and the signal processing...The Allan variance analysis method is used to identify the stochastic noise in the stray current sensor. The stray current characteristic is firstly introduced. Then the optical configuration and the signal processing method of the stray current sensor are illustrated. Moreover, the cause of the stochastic noise in the stray current sensor is analyzed. The calculation method of the stochastic noise coefficient is presented in detail. And the feasibility of the stochastic noise identification with the Allan variance analysis method is evaluated. Furthermore, the zero-drift signal acquisition experiment is conducted to identify the stochastic noise in the stray current sensor. According to the experimental result, the bias instability noise, the quantization noise and the white noise are identified as the major stochastic noise. Finally, the experiment on the direct-current signal acquisitions is conducted, whose results indicate that the signal drift of the measured direct-current is mainly caused by the major stochastic noise. And the suppression methods of the major stochastic noise are proposed.展开更多
工业铁塔广泛应用于电力高压输电线、通信天线等领域,但塔身高度和结构特点易使其成为雷击目标。雷击现象具有突发性和强破坏性,其危害与雷电信号的冲击特性相关,如电流强度大、持续时间短等。针对当前雷电监测现状,利用无源雷电流传感...工业铁塔广泛应用于电力高压输电线、通信天线等领域,但塔身高度和结构特点易使其成为雷击目标。雷击现象具有突发性和强破坏性,其危害与雷电信号的冲击特性相关,如电流强度大、持续时间短等。针对当前雷电监测现状,利用无源雷电流传感器采集雷电流信号,设计了一种新型红外光纤调制解调器处理雷电信号,通过S/PDIF(Sony/Philips Digital Interconnect Format)光纤稳定传送至检测终端,实现在复杂工业环境下雷电信号的检测处理。应用5G技术将测量数据传输到云服务器进行分析,用户可通过手机App或Web界面访问云服务器,实现雷电远程在线监测。实验结果表明,工业铁塔发生雷击事件时,该监测系统能够准确记录雷击时间、次数和雷电流强度。这为广泛开展雷电活动监测工作提供了一种稳定、可靠的技术手段。展开更多
基金Project(2017QNA13)supported by Fundamental Research Funds for the Central Universities,ChinaProject(PAPD)supported by Priority Academic Program Development of Jiangsu Higher Education Institutions,China
文摘The Allan variance analysis method is used to identify the stochastic noise in the stray current sensor. The stray current characteristic is firstly introduced. Then the optical configuration and the signal processing method of the stray current sensor are illustrated. Moreover, the cause of the stochastic noise in the stray current sensor is analyzed. The calculation method of the stochastic noise coefficient is presented in detail. And the feasibility of the stochastic noise identification with the Allan variance analysis method is evaluated. Furthermore, the zero-drift signal acquisition experiment is conducted to identify the stochastic noise in the stray current sensor. According to the experimental result, the bias instability noise, the quantization noise and the white noise are identified as the major stochastic noise. Finally, the experiment on the direct-current signal acquisitions is conducted, whose results indicate that the signal drift of the measured direct-current is mainly caused by the major stochastic noise. And the suppression methods of the major stochastic noise are proposed.
文摘工业铁塔广泛应用于电力高压输电线、通信天线等领域,但塔身高度和结构特点易使其成为雷击目标。雷击现象具有突发性和强破坏性,其危害与雷电信号的冲击特性相关,如电流强度大、持续时间短等。针对当前雷电监测现状,利用无源雷电流传感器采集雷电流信号,设计了一种新型红外光纤调制解调器处理雷电信号,通过S/PDIF(Sony/Philips Digital Interconnect Format)光纤稳定传送至检测终端,实现在复杂工业环境下雷电信号的检测处理。应用5G技术将测量数据传输到云服务器进行分析,用户可通过手机App或Web界面访问云服务器,实现雷电远程在线监测。实验结果表明,工业铁塔发生雷击事件时,该监测系统能够准确记录雷击时间、次数和雷电流强度。这为广泛开展雷电活动监测工作提供了一种稳定、可靠的技术手段。
