The Design Of Wireless Image Acquisition System Based On WIFI

With the development of embedded systems,combined the embedded monitoring system with WIFI transmission mode,renders the monitoring system becomes more flexible and do not consider limiting the wiring,so that monitoring system has been leap development.In this thesis,the main research of wireless monitoring system is to make the monitoring system from wired connection to wireless connection,in line with the development of society, and has a broad prospects.This thesis designs the image information acquisition system based on WIFI,the design is divided into hardware and software program.The hardware design mainly includes the microprocessor minimum system design,the WIFI module design,camera module design and the design of display module.The microprocessor minimum system includes a reset circuit,oscillator circuit,debug circuit and so on.The system selects Cortes-M3 kernel as the microprocessor chip based on STM32,0.96 inch OLED display module,WM-G-MR-09 WIFI module and CMOS image sensor module OV7670 with CAM interface.MR-09 select Marvell 88W8686 wireless chip, support IEEE802.11g/b standards,so the board can be extended to support WIFI communications devices.After the system is built,the data realize transmission between the intelligent terminal and the image acquisition terminal through the WIFI network.Software design mainly adopts the modular program design,each module in the system are a separate subroutine,the software design includes camera module software flow design,LwIP protocol stack.According to the design requirements of each module configuration, realize the function of each module.This thesis has completed the design of hardware and software, and through the test of the system,the image acquisition function can be realized.The experimental results show that the real-time image acquisition can be achieved stably under different WIFI intensities,which show the system design is feasible.The system has many advantages,such as simple hardware circuit connection,low power consumption,small size,cost-effective and stable system.The realization of the system function provides the research direction for the future development of the monitoring system.