Research And Implementation Of Field Image Acquisition And Wireless Transmission System On SimpliciTI

Agronomic levels are in constant development due to infiltration and application of modern control technology and the microelectronics technology in agriculture.Agriculture has gradually evolved from traditional into modern agriculture which is still developing and expanding to cover large scale.Providing the most adapt environment for growing crops and increase the quantity and quality and improve the the region economy are the trend of intelligent agricultural development.To acquire information of farmland is the basis of agriculture research.Filed image information is one of the important filed fundamental information in analysis of agriculture situation.In view of shortcuts of farmland image acquisition and transmitting such as on-site installation difficulties,complex wiring,and monitoring angels problems.The topic researches and designs a set of farmland image acquisition and wireless transmission system based on simpliciTI network protocol,and the system consists of following three parts.Acquisition network of farmland image:the system uses MCU and RF hardware architecture to design.Transplanting simpliciTI protocol to STM32 hardware platform.Image nodes use lithium battery,and introduce mechanism of the sleep-wake up reducing sharply the node energy consumption.Stored the acquisition images into SD card,which is outside enlarged room of image nodes,and subcontract by the relay nodes,routing forward to gateway nodes.Farmland image manager equipment:gateway nodes and image nodes have the incompatible controller,transplanting uIP protocol,and using SPI interface with the Ethernet communication to realize wireless sensor network and the external network protocol conversation and physical connection.Gateway data and external wireless network bridge connect through network ports,transmitting image data to monitoring Indoor server for the storage management.Remote web server:Web server is primarily a remote access to the image information and the work of image management,consists of three parts,such as:Farmland image database,web system and application server software.The local server and gateway service communicate through direction Wi-Fi device.The farmland image database was developed,based on oraclelOg database version.Web system was designed based on hibernate framework,using JSP development,to complete remote web server released by tomcat tool.The overall test of system result is stable,reliable and would be able to collect images successfully,WSN by adding the relay nodes are to group mesh topology network,Meet the needs of wireless network acquisition field image information.The subject use directional Wi-Fi equipment to transmission futhest up to 500m,meeting the needs of Farmland,designing reasonable.Test image nodes parameters,including the bit rate error and packet error,and the total of image data is 153600 bytes,increasing BMP image header to recovery design.Image acquisition nodes for node to node from one jump and several jump are tested.The result shows that the wireless transmission in the process is decided by transmission rate,energy and network band width.The whole system design proved a new solution for the farmland image acquisition wireless and network.