摘要
由于老年人身体机能下降,导致老人在行走中存在易跌倒的问题。设计了基于三轴加速度传感器、AVR单片机和灯光、蜂鸣器报警设备的跌倒探测器。利用三轴加速度传感器采集人体的三维加速度值,并由单片机进行分析,当探测到有异常跌倒发生时,通过蜂鸣器和灯光进行报警。通过实际检测实验,设定合理的阈值和算法来判定是否发生跌倒。另外,系统设置了复位功能来消除误报。实验结果发现,当发生跌倒时,能在1 s内判断出是否发生异常跌倒,其平均准确率为95%,可以满足实际需要。
Due to the decline of the physical function of the elderly, the elderly are prone to fall in walking. This paper designs a fall detector based on three-axis acceleration sensor, AVR single-chip computer and light, buzzer alarm equipment. Three-axis accelerometer is used to collect the three-dimensional acceleration value of human body, which is analyzed by single chip computer. When abnormal falls are detected, alarm is given by buzzer and light. Through actual detection experiments, reasonable threshold and algorithm are set to determine whether a fall occurs. In addition, the system has reset function to eliminate false alarm. The experimental results show that when a fall occurs, it can judge whether an abnormal fall occurs within one second. The average accuracy is 95%, which can meet the actual needs.
作者
徐瑞超
常丽园
XU Ruichao;CHANG Liyuan(School of Mechanical Engineering,Shaanxi Defence Vocational & Technical College,Xi’an 710300,China)
出处
《东莞理工学院学报》
2019年第5期110-114,共5页
Journal of Dongguan University of Technology
