基于环境传感器和穿戴式传感器的行为异常检测

针对独居老人频繁出现行为异常的情况，提出了基于热释电红外传感器和穿戴式传感器的老人行为异常检测系 统。设计了行为异常检测的硬件环境，介绍了红外传感器和穿戴式传感器的工作原理，提出了依据重力加速度所在轴向 检测老人躺下位置是否发生异常的方法，并融合了红外传感器和穿戴式传感器的信息对躺下位置异常进行检测。在1 居室的家庭环境中对位置异常检测的方法进行验证，通过实验的方法验证了算法的可行性，并确定了检测躺下状态的阈 值。系统能有效实现对独居老人是否发生躺下位置异常进行检测。

Location Abnormal Detection Based on Environment Sensors and Wearable Sensors

According to the problem that old solitary people have displayed abnormal behavior in daily life frequently, abnormal behavior detection method was proposed in this paper based on the pyroelectric infrared sensors ( PIR) and wearable sensors. The hardware environment of abnormal behavior detection was designed, the working principle of PIR sensors and wearable sensors was introduced, and the method of detect whether the old men''s position was lying properly was proposed, which was based on what axis the acceleration of gravity the old men lied down, and the information of PIR sensors and wearable sensors were fused to detect anomalies lying position. In the " one room house" family environment, the anomaly detection method was validated, the feasibility of the algorithm and the threshold of the lying states were verified through the experiment. The system was effective to detect whether the elderly people have abnormal behaviors.