摘要
现实生活中针对居家老人的安全防护主要是通过固定通讯设备被动询问,危险发生时难以及时获得老人的状况,造成不可预知的严重后果。室内人员预警系统的设计依据信号到达时差(Time Difference of Arrival,TDOA)和基于球面的空间定位组合(Sphere-Based Localization Scheme,SBLS)原理对定位节点(老人)实施三维定位,采用实时主动跟踪被定位节点的三维位置信息,通过动态对空间信息和时间信息的综合比对判断定位节点是否处在设定的"危险状态"并进行实时预警,经过实际测试15m2面积上4个测量节点基本能够监测到定位节点的位置变化情况。当定位节点处在"危险状态"时系统通过所携带设备发出震动和响声提示此刻是"危险状态";实时预警是对外部(如:子女,医院等)进行电话预警。整套系统不需要被动查询老人状态,通过全方位监测和实时预警使居家老人的安全防护得到改善和提高。
Security protection for elderly people is now mainly through passive inquiry with fixed communication equipment. This may cause unpredictable and serious consequences because it is dif- ficult to know exactly what the situation of the elderly person is when a dangerous situation arises. Based on the Time Difference of Arrival （TDOA） of a signal and the principle of the Sphere-Based Localization Scheme （SBLS）, an Interior Personnel Warning System was designed to show, in three-dimensions the position and location of the elderly person. This system can actively track in real time and provide location information, with three-dimensional positioning of the node location, and estimate whether the node location is in a ＂dangerous state＂ by comparing the dynamic informa- tion of space and time and then producing a real-time warning. This is achieved by monitoring the changing situation of the node location through actually measuring the node location in an area of 15 m2. When the node location is in a ＂dangerous state＂, the system produces a ＂dangerous state＂ a- larm through the sound and vibration of the node （equipment carried by the elderly person）. The real-time warning is then delivered externally （e. g. children, hospital, etc. ） by telephone. This system improves the security protection of elderly people through comprehensive monitoring and re- al-time warning without passively inquiring the state of the elderly person.
出处
《西安邮电学院学报》
2013年第1期104-108,共5页
Journal of Xi'an Institute of Posts and Telecommunications
关键词
室内定位
信号到达时差
基于球面空间定位组合
预警
三维定位
Interior Location, Time Difference of Arrival （TDOA）, Sphere-Based Localization Scheme（SBLS）, warning, three-dimensional positioning
