In order to find and rescue in time when the elderly fall

an intelligent system for fall detection and positioning alarm and resuce is designed. STM32 F103 ZET6 is used as the microprocessor of the system

triaxial acceleration sensor ADXL345 is used to obtain acceleration data. And ATK—NEO—6 M is used to realize global positioning. When the elderly fall

SIM900 A sends a message containing location information for help to a specific person. An algorithm for fall detection is proposed. The resultant acceleration threshold and time threshold are used to determine whether the three processes of weightlessness

impact and rest occurred sequentially. The human attitude angle is judged by the set attitude angle threshold whether it exceeds normal range

and the system determines whether or not the person fell eventually. Test results show that the accuracy of fall detection is 97 %.The system has stable performance and meets the standard of human fall detection.