1. Design requirements
1.1 Summary of Design Requirements
my country's only child, as well as the aging of the population, are gradually becoming a major social problem. The decline in the physical ability of the elderly, and the safety and hazards caused by falls are becoming more and more prominent. The country and society are paying more and more attention to the health of the elderly. And safety, it is of great practical significance to develop a fall detection and alarm system that can detect whether the elderly have fallen in real time and can inform the guardian in time.
Currently, a device for detecting the travel safety of the elderly is 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, the status of the elderly can be known. If it is detected that an elderly person has fallen, the current location on the network will be uploaded to the OneNet IoT cloud platform in real time at this time. Send text messages to notify family members. 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 APP. There is also an LCD display on the device. The elderly can press the button to open the health code, and the payment code will be displayed on the screen. They can scan the health code in public places to improve convenience when shopping.
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) MPU6050 gyroscope is used to detect the fall of the elderly. When the fall of the elderly 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 elderly will be displayed on the map