设计了一种基于物联网的煤矿井下电力谐波在线监测节点方案,以ARM11 S3C6410为核心控制器,移植嵌入式linux操作系统,采用插值加窗函数快速傅里叶变换的检测算法,设计的电力谐波检测模块和Zigbee无线传输模块,可实现检测节点谐波参数的精确采集和无线传感器网络系统的组建,具有装置结构简单、布点灵活、成本低等特点。 A scheme of on-line monitoring of coal mine power harmonics based on Internet of things is designed. ARM11 S3C6410 is used as the core controller and the embedded Linux operating system is transplanted. The detection algorithm of fast Fourier transform of interpolation window function is adopted. The designed power Harmonic detection module and Zigbee wireless transmission module, which can realize the accurate collection of detecting node harmonic parameters and the establishment of wireless sensor network system. It has the advantages of simple device structure, flexible distribution and low cost.