在基于ZigBee的无线传感器网络中使用无芯霍尔效应传感器实现精确的电流测量

Kun-Long Chen, Yuan-Pin Tsai, N. Chen, S. Korkua, Weijen Lee
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引用次数: 11

摘要

本研究将无芯霍尔效应电流互感器(hct)、ZigBee通信和静态电压调整相结合,开发了一种新的非直导线电流测量方法。提出的设计包括低成本、低功耗和无线通信能力的独特特点,使其能够灵活地在不同环境下进行电流测量。此外,静态电压调节功能可以调节直流电压水平,消除每个霍尔传感器的直流2.5±0.05 V静态电压要求,方便后端监控系统的信号转换。仿真和测量结果表明,hct可以消除导线非直线结构或截面不对称引起的导线外磁通密度分布不对称的问题。采用hct测量电流的精度等级可达到IEC标准的0.5级,电流波形不受传统ct的饱和影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Using coreless hall effect sensor for accurate current measurement in ZigBee based wireless sensor network
This study combines coreless Hall effect current transformers (HCTs), ZigBee communication, and a quiescent voltage adjustment to develops a new current measurement method for non-straight conducting wires. The proposed design includes the unique characteristics of low cost, low power consumption, and wireless communication capability that makes it flexible for current measurement at different environments. In addition, the quiescent voltage adjustment enable the adjustment of DC voltage level to eliminate the DC 2.5±0.05 V quiescent voltage requirement in each Hall sensor for an easy signal transformation in back-end monitoring systems. Simulation and measurement results show that HCTs can eliminate the problems of asymmetric magnetic flux density distributions outside the conducting wire which originated from its non-straight structure or its asymmetric cross-section. The accuracy class of the current measurements using HCTs can meet the 0,5 class according to IEC standard and their current waveforms do not suffer the saturation from using traditional CTs.
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