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
In order to suppress the influence of temperature changes on the performance of accelerometers,a digital quartz resonant accelerometer with low temperature drift is developed using a quartz resonator cluster as a tran...In order to suppress the influence of temperature changes on the performance of accelerometers,a digital quartz resonant accelerometer with low temperature drift is developed using a quartz resonator cluster as a transducer element.In addition,a digital intellectual property(IP) is designed in FPGA to achieve signal processing and fusion of integrated resonators.A testing system for digital quartz resonant accelerometers is established to characterize the performance under different conditions.The scale factor of the accelerometer prototype reaches 3561.63 Hz/g in the range of -1 g to +1 g,and 3542.5 Hz/g in the range of-10 g to+10 g.In different measurement ranges,the linear correlation coefficient R~2 of the accelerometer achieves greater than 0.998.The temperature drift of the accelerometer prototype is tested using a constant temperature test chamber,with a temperature change from -20℃ to 80℃.After temperature-drift compensation,the zero bias temperature coefficient falls to 0.08 mg/℃,and the scale factor temperature coefficient is 65.43 ppm/℃.The experimental results show that the digital quartz resonant accelerometer exhibits excellent sensitivity and low temperature drift.展开更多
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。
文摘In order to suppress the influence of temperature changes on the performance of accelerometers,a digital quartz resonant accelerometer with low temperature drift is developed using a quartz resonator cluster as a transducer element.In addition,a digital intellectual property(IP) is designed in FPGA to achieve signal processing and fusion of integrated resonators.A testing system for digital quartz resonant accelerometers is established to characterize the performance under different conditions.The scale factor of the accelerometer prototype reaches 3561.63 Hz/g in the range of -1 g to +1 g,and 3542.5 Hz/g in the range of-10 g to+10 g.In different measurement ranges,the linear correlation coefficient R~2 of the accelerometer achieves greater than 0.998.The temperature drift of the accelerometer prototype is tested using a constant temperature test chamber,with a temperature change from -20℃ to 80℃.After temperature-drift compensation,the zero bias temperature coefficient falls to 0.08 mg/℃,and the scale factor temperature coefficient is 65.43 ppm/℃.The experimental results show that the digital quartz resonant accelerometer exhibits excellent sensitivity and low temperature drift.
