基于电磁波取能的GIS声学指纹传感系统

A GIS acoustic fingerprint sensing system based on electromagnetic power supply

针对气体绝缘开关设备需要有效的在线监测以及对监测设备具有安全要求,该文提出一种基于电磁波取能的GIS操动机构声学指纹无源传感系统方案。文章从课题需求入手,提出了该系统整体方案,在此方案基础上论述了GIS声学指纹传感器指标参数、设计思路、工作流程和电路设计;之后论文还分析了超高频(UHF)电磁波取能的理论和实验数据,给合信号特点设计出取能及低功耗处理通信电路架构,并给出了数据采集设备和取能低处理电路的协作流程。通过硬件实现及测试,最终系统实现了3 m外UHF电磁取能正常工作并且数据上传,其中传感器可存储9组采样率160 kSa/s、带宽20 kHz、采集时间175 ms的振动信号,达到课题设计预期。

Aiming at the need of effective online monitoring and the safety requirements of Gas Insulated Switchgear(GIS),a scheme of acoustic fingerprint passive sensing system based on GIS operating mechanism based on electromagnetic power supply is proposed in this paper.Based on the requirement of the subject,this paper puts forward the overall scheme of the system,and discusses the index parameters,design ideas,work flow and circuit design of GIS acoustic fingerprint sensor.After that,the thesis also analyzes the theoretical and experimental data of energy extraction of UHF electromagnetic wave,designs the communication circuit architecture of energy extraction and low power consumption processing for the characteristics of combined signals,and gives the cooperative flow of data acquisition equipment and energy extraction low processing circuit.Through hardware implementation and testing,the system finally realized the normal operation of UHF electromagnetic energy at a distance of 3 meters and uploaded data,in which the sensor could store 9 sets of vibration signals with a sampling rate of 160kSa/s,a bandwidth of 20 kHz,and a collection time of 175 ms,reaching the expectation of the project design.