...
首页> 外文期刊>Building and Environment >Device-free occupant activity recognition in smart offices using intrinsic Wi-Fi components
【24h】

Device-free occupant activity recognition in smart offices using intrinsic Wi-Fi components

机译:使用固有Wi-Fi组件的智能办公室中的无设备占用者活动识别

获取原文
获取原文并翻译 | 示例
           

摘要

Occupant activity recognition (OAR) is essential for building management systems (BMS) to provide occupants with intelligent and comfort environments. Conventional sensing methodologies rely on burdensome wearables, privacy-risking cameras or specialized wireless devices. Pervasive existing Wi-Fi signals are a promising alternative and enable ubiquitous occupant sensing. In this paper, we propose a Wi-Fi-based OAR system called Wi-OAR that enables energy-efficient and user-centric services in smart offices. Its technical novelties are twofold. First, to recover activity-induced information, we innovatively present the fast and robust target component separation (FRTCS) algorithm regarding both time efficiency and high accuracy. Second, noting that handcrafted features can be inefficient and redundant, we develop an efficient feature selection algorithm based on class differences and information entropy. We prototyped the Wi-OAR system with only a pair of commercial Wi-Fi devices and implemented it in diverse office environments. The experimental results illustrate a consistent accuracy of over 96% in the different scenarios with considerable time cost savings. Further studies compare the system performance with prior approaches and discuss the influences of variables, which demonstrate the superiority of Wi-OAR.
机译:乘员活动识别(OAR)对于建筑物管理系统(BMS)来说是必不可少的,它可以为乘员提供智能,舒适的环境。传统的传感方法依赖于笨重的可穿戴设备,具有隐私风险的相机或专用无线设备。普遍存在的现有Wi-Fi信号是一种有前途的替代方案,可实现无处不在的乘员感知。在本文中,我们提出了一种称为Wi-OAR的基于Wi-Fi的OAR系统,该系统可在智能办公室中实现节能和以用户为中心的服务。它的技术新颖性是双重的。首先,为了恢复活动引起的信息,我们创新地提出了一种既快速又可靠的目标时间间隔和准确性高的目标成分分离(FRTCS)算法。其次,注意到手工制作的功能可能效率低下且冗余,我们基于类差异和信息熵开发了一种有效的功能选择算法。我们仅使用一对商用Wi-Fi设备对Wi-OAR系统进行了原型设计,并在各种办公环境中进行了实现。实验结果表明,在不同情况下的一致精度超过96%,可节省大量时间成本。进一步的研究将系统性能与现有方法进行了比较,并讨论了变量的影响,从而证明了Wi-OAR的优越性。

著录项

  • 来源
    《Building and Environment》 |2020年第4期|106737.1-106737.13|共13页
  • 作者

  • 作者单位

    Army Engn Univ PLA Coll Def Engn 1 Haifu Xiang Nanjing 210007 Peoples R China|Nanjing Univ Sci & Technol Sch Comp Sci & Engn 200 Xiaolingwei Rd Nanjing 210094 Peoples R China;

    Army Engn Univ PLA Coll Def Engn 1 Haifu Xiang Nanjing 210007 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Occupant activity recognition; Wi-fi; Smart offices; Signal separation; Feature engineering;

    机译:乘员活动识别;无线上网;智能办公室;信号分离特征工程;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号