Skin-contact sensor for automatic fall detection
Skin-contact sensor for automatic fall detection
复制标题
用于自动跌倒检测的皮肤接触传感器
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Ravi Narasimhan
中科院分区：
文献类型：
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作者：
Ravi Narasimhan
本文描述了一种佩戴在皮肤上的粘性传感器系统，可自动检测人体跌倒情况。该传感器由三轴加速度计、微控制器和蓝牙低功耗收发器组成，可以以任何方向佩戴在受试者躯干的任何位置。为了轻松地区分跌倒和日常生活活动 (ADL)，只有在检测到撞击并且对象随后不久处于水平状态时，才会检测到可能的跌倒。作为减少误报的附加标准，如果可能跌倒后几秒钟的用户活动水平低于阈值，则确认跌倒。 10 名志愿者在体操垫上故意摔倒（总共 297 次摔倒）； ADL 由 15 名老年志愿者（总共 315 名 ADL）进行。跌倒检测算法的灵敏度为 99%，特异性为 100%。
This paper describes an adhesive sensor system worn on the skin that automatically detects human falls. The sensor, which consists of a tri-axial accelerometer, a microcontroller and a Bluetooth Low Energy transceiver, can be worn anywhere on a subject's torso and in any orientation. In order to distinguish easily between falls and activities of daily living (ADL), a possible fall is detected only if an impact is detected and if the subject is horizontal shortly afterwards. As an additional criterion to reduce false positives, a fall is confirmed if the user activity level several seconds after a possible fall is below a threshold. Intentional falls onto a gymnastics mat were performed by 10 volunteers (total of 297 falls); ADL were performed by 15 elderly volunteers (total of 315 ADL). The fall detection algorithm provided a sensitivity of 99% and a specificity of 100%.