Research and design of elderly health monitoring and anti-fall positioning alarm device based on STM32

With the economic development and the improvement of living standards, the aging problem has become more and more serious, and the health and safety of the elderly have also attracted much attention. In order to detect and rescue the elderly when they fall and monitor the vital signs of the elderly in real time, this paper designs an elderly health monitoring and fall prevention positioning alarm device. The device is based on STM32 single chip microcomputer system and adopts modular design. It is equipped with SIM800 C mobile communication module and GPS positioning module. When the old man falls unexpectedly and does not stand up in a certain period of time, the device automatically calls the bound guardian's cell phone and sends SMS to display the location and state of the old man. Sensors such as body temperature, heart rate and step number are integrated to detect the health data of the elderly in real time, and alarm quickly when the data are abnormal. At the same time, cloud monitoring app is developed based on E4A platform to monitor the physical state of the elderly in real time. The experimental results show that the device can correctly identify most fall states, and the false alarm rate and missed alarm rate are low. It can effectively distinguish fall and daily life behavior. The test accuracy reaches 92 %, and has high stability and reliability.