基于加速度的低成本 CW 雷达系统用于实时检测老年人跌倒情况

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Dimitrios G. Arnaoutoglou;Dimitrios Dedemadis;Antigone-Aikaterini Kyriakou;Sotirios Katsimentes;Athanasios Grekidis;Dimitrios Menychtas;Nikolaos Aggelousis;Georgios Ch. Sirakoulis;George A. Kyriacou
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引用次数: 0

摘要

跌倒可能是老年人一生中可能经历的最具伤害性的事件之一,尤其是当他们独自生活时。跌倒造成的影响可能是轻微的擦伤,也可能是改变生命的骨折,甚至是致命的。本研究的目的是建立一种新颖的非接触式雷达方法,用于检测老人在家中跌倒的情况。所提出的检测技术的新颖之处在于利用了从短时傅立叶变换(STFT)中得到的一维有效加速度。该技术利用 2.45 GHz 连续波 (CW) 雷达进行了测试,该雷达由软件定义无线电 (SDR) 和低成本的现成组件实现。在此,我们介绍了在视线范围内将事件划分为坠落或非坠落的测试结果。首先,我们将测试结果与基于商业标记的光电运动捕捉多摄像头系统(VICON)测得的相应值进行了比较,结果显示两者具有很高的相似性。此外,还进行了实时情景模拟,以估算所提方法的准确性和误报率。事实证明,所提出的算法能够利用功率突发曲线(PBC)作为初步因素,根据有效加速度生成高效的跌倒事件分类器,同时最大限度地减少所需的处理资源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Acceleration-Based Low-Cost CW Radar System for Real-Time Elderly Fall Detection
Falls can be one of the most damaging events that elders may experience in their lives, especially when they live alone. The impact of a fall can vary from minor bruises, to life altering fractures and even become fatal. The purpose of this study is to establish a novel non-contact radar method of detecting an elderly fall when occurred in home staying. The novelty of the proposed detection technique is the exploitation of a 1D effective acceleration derived from Short Time Fourier Transform (STFT). This technique was tested utilizing a 2.45 GHz Continuous Wave (CW) Radar implemented with a Software Defined Radio (SDR) and low-cost, off-the-shelf components. Herein, we present test results that classify incidents as either falls or non-falls in line-of-sight cases. Firstly, the results are compared with the corresponding values measured with a commercial marker-based optoelectronic motion capture multi-camera system (VICON) showing high similarity. Furthermore, real-time scenarios were conducted to estimate the accuracy and the number of false alarms of the proposed method. The proposed algorithm is proved capable of exploiting the Power Burst Curve (PBC) as a preliminary factor to yield an efficient fall incident classifier based on the effective acceleration, while minimizing the required processing resources.
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来源期刊
CiteScore
5.80
自引率
9.40%
发文量
58
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