1. Design requirements
1.1 Summary of Design Requirements
With the deepening of the aging population in our country, the health and safety of the elderly has increasingly become the focus of social attention. The physical ability of the elderly is declining, and the safety and hazards caused by falls are becoming more and more prominent. In order to solve the problems caused by the fall of the elderly, a device for detecting the fall of the elderly is currently designed, using STM32 as the main control chip. The system includes three parts: a fall detection module, a GPS positioning module and a communication module. By detecting the daily status of the elderly, you can know the status of the elderly. If the old man gets lost outside, he can send a text message to notify the family through the corresponding button, and the family can see the old man's location on the mobile phone APP. There is also an LCD display on the device, and the elderly can switch between the time display page, the GPS latitude and longitude display page, and the WeChat payment code display page by pressing the button, which improves the convenience when shopping and paying outside.
Function summary:
(1) Use STM32 single-chip microcomputer as the main control chip, and cooperate with other modules to complete the functional design
(2) The communication module adopts SIM800C, which supports uploading the collected GPS latitude and longitude data to the cloud server, and the cloud adopts the OneNet Internet of Things platform.
(3) Elderly fall detection adopts MPU6050 gyroscope detection. When an elderly fall is detected, a text message will be sent to the emergency contact through SIM800C. The buzzer on the device will sound an alarm, and pedestrians around can also help if they hear it; and the GPS data will be uploaded to the cloud, and the location of the elderly will be displayed on the map. After the family members know the elderly fell through text messages, they can quickly rush to the elderly through the location displayed on the cloud map, or call the police for help and report the position