| Today,with the rapid development of society,people’s quality of life is steadily rising.There is an inseparable relationship between people’s health and the quality of indoor environment.people pay more and more attention to home environment monitoring.With the aggravation of the aging population,the situation of children not around has become widespread.Older people’s lives are facing more threats,such as indoor environment temperature and humidity,falls problems in home.These problems need to be solved in a more intelligent way.Firstly,this paper studies the current environment monitoring technology and its development status.By comparing different short-distance wireless communication technologies,Zig Bee technology is the wireless communication technology of the whole system because of its low cost,flexible networking and reliable communication.This paper analyses the actual needs of the elderly,and refers to the design specifications of the national old-age residential system.A environment monitoring system for the elderly has been developed.In the whole process,I participate in the design of the overall framework of the system,and complete the specific work of the system hardware.In the aspect of system hardware,the selection of hardware devices is introduced,the MCU,Zig Bee module,temperature and humidity sensor,three-axis accelerometer used in hardware are selected.The hardware composition of the home environment monitoring system is drawn.In the hardware design process,the circuit diagrams of MCU and Zig Bee modules are studied,and the circuit diagrams of the connection between sensor and MCU are completed.RS232 port is used to connect wireless module and MCU.The communication module consists of two Zig Bee router and one Zig Bee coordinator.In order to achieve wireless networking.In terms of software program,DHT11 module,three-axis accelerometer ADXL345 module are programmed.Use PC to read the stored data of MCU.The hardware is connected by asynchronous serial port.Connect the hardware module of the system,formulate the debugging content and process.After the connection,debug the system.After debugging,it meets some problems.Through the analysis of the problems,the program is modified repeatedly until the system runs steadily.After the system is running normally,test the function of the system,focusing on the environmental temperature and humidity monitoring experiment and the fall prevention experiment of the old people.By comparing the experimental data,we can verify the function of the system.Summarize the problems encountered in testing.In the test,the system runs normally and achieves the expected results.After using the system,it can timely monitor the home environmental and the action status of the elderly.The system can guarantee the living environment requirements of the elderly,shorten the delay time of the elderly in unexpected situations,and protect the safety of the elderly. |
