摘要
为满足养老院老人监护系统成本低、响应快速等要求,将无线传感器网络(WSN)技术应用到老人监护系统中,提出了一种基于接收信号强度(RSSI)测距的无线定位方案。对养老院具体环境和定位要求进行了分析,以Micaz节点构建了系统平台,并结合RSSI测距的特点,提出了在不同环境下的锚节点部署方案;设计了适应性强的区域三边定位算法,以实时监测老人的位置信息,当老人身体出现异常时,能快速确定老人位置,确保老人的人身安全;最后,通过实验验证了该定位算法的正确性。研究结果表明,基于RSSI测距的老人监护系统定位方案能够较好地完成定位功能,帮助医护人员及时准确地到达出事地点,加快救援速度。
In order to meet the low-cost and fast-response demands of the monitoring system,a wireless location scheme for the elderly based on received signal strength indicator（RSSI） range was proposed with wireless sensor network（WSN） applied to the monitoring system.With the analysis of specific environment and location requirements,the system platform was established with Micaz nodes,and combined with the characteristics of RSSI location,a deployment scheme of micaz nodes under different environment was put forward.In the meantime,an adaptable regional trilateral positioning algorithm was devised.In this scheme,the real-time monitoring of the location of the elderly was achieved.When a physical disorder occurs to an elderly,the location will be rapidly determined to guarantee the safety of the elderly.The validity of the location algorithm was verified through experiments.Research result shows the RSSI based location scheme does make for the timely arrival at the spot of health care workers and the rapid rescue of the elderly.
出处
《机电工程》
CAS
2012年第7期861-864,共4页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(60974017)
浙江省自然科学基金资助项目(Y1110484)
浙江省新苗人才计划资助项目(2010R403009)
关键词
老人监护系统
接收信号强度
定位算法
无线传感器网络
monitoring system of elderly
received signal strength indicator（RSSI）
location algorithm
wireless sensor network（WSN）
