Research And Implementation Of Data Collection Platform In Opportunistic Mobile Sensor Networks

With the development of embedded system,network and wireless communication technology,sensors with computation,perception and communication capabilities as well as the wireless sensor network is entering people's lives.Using of mobile nodes,deployed little sensor nodes in the sparse area,the moving sink node can establishing a communication link to sensing area by a certain probability.It can provide higher reliability and greater awareness.However,the general wireless sensor networks need a special sink node to communicate with the normal network,and to use the movable sink node need professional equipment or people.Based on the reality condition of above,this paper consider to use the smart phone as the movable sink node.When the phone installed specific software passing the sensing area,it can collect the date automatically.To use the sensor,network,Bluetooth and other functions of smart phones to collect,integrate,report of the sensing data.Based on the background of intelligent storage system,this paper develops a data collection platform,including environment sensing,storage management and access control system.The main research contents are as follows:(1)A universal wireless sensor network node is designed.The interface of the node expands rich functions.users can easily connect a variety of sensors and communication modules.Common sensor node can connect to a Bluetooth module to interact with smart phone.Smart phones can be used to facilitate the collection of perceived data.(2)Designed and implemented a universal Bluetooth module with control and operation function.Module can be used as a common Bluetooth for communication,while the board integrate the ARM-core CPU also has a strong computing and processing capabilities.The module is used as the core control module of the access control system and the communication module in other systems.(3)Designed and implemented the ultra-high frequency RFID reader and reserved kinds of interfaces.Users can connect it with USB interface to interact with computer to do things like storage management and others.Can also be connected to the Bluetooth module,Using mobile phone to realize storage management and data reporting function.(4)A data collection algorithm of access control and storage environment with high security is studied.The algorithm based on MD5 encryption and dynamic password mechanism,effectively improve the security of access control system and the convenience of management.At the same time using the Contact-Perception technology,can automatically realize the storage data,environmental data collection and reporting function.(5)The design and development of data collection platform in opportunistic mobile sensor networks is realized.In this paper,the hardware design of wireless sensor network node,ultra high frequency RFID reader,access control system Bluetooth control board,and the control algorithm are designed.Completed the customization and development of the mobile terminal software,and completed the design and implementation of the server data storage,Web query management function.