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In the monitoring region, through the deployment of a large number of inexpensive sensor nodes, you can build a wireless sensor network. Sensor nodes in the network can be self-organized manner in cooperation or monitoring the various environmental objects for real-time monitoring, sensing, collecting and processing operations. No support infrastructure, wireless sensor networks have arranged for simple, strong invulnerability, etc., can be severe in people inaccessible environments or special monitoring tasks to complete, so it has a very broad application prospects, causing the world Many countries military, academia and industry attention, has become a hot research field emerging frontier. In traditional ironmaking process, using hot metal torpedo tanker shipment. Molten iron loading required before torpedo cars parked casthouse swing chute to the lower position by iron and reported torpedo tank number. China to use manual management, on-site observation scheduling positioning Torpedo tanker operation and control, and the use of artificial means to read engraved number on the torpedo tank. Due to the different amount of residue torpedo tank tanker differences, each iron water tank can be loaded, these automatic monitoring device also requires the ability to automatically obtain the tanker number to determine the full tank of molten iron endpoint control objectives, to prevent overflow tank failure. Given the uncertainty manual mode operation, this paper uses triangulation integration with centroid localization algorithm to achieve automatic positioning torpedo tank and tank number automatically recognition. To ensure the torpedo tank into ironworks casthouse iron swing chute position by lower accuracy and reliability, the use of radio frequency identification technology, set up a redundant positioning. But also for the aforementioned positioning systems distance calculation, the corrected basis. This major work completed as follows: (a) to read and analyze information about the large number of wireless sensor network literature, summarized and presented history of the development of wireless sensor networks, network structure, the sensor node structure, protocol stack structure, characteristics, performance evaluation criteria , key technologies and applications. (2) information on the wireless sensor network node positioning itself in the basics, including node localization mechanism nodes ranging method, the basic method of computing nodes position and positioning performance evaluation. Then it reviews the recent field representative algorithms and systems principles and characteristics. (3) proposed a triangulation with centroid fusion of node localization algorithm, the positioning algorithm process is described in detail, and use NS2 simulation tool of the algorithm in the average error aspects of the simulation results show that when the beacon nodes When the number reaches 22, can greatly reduce the average error. (4) studied the functional requirements of the hardware design, hardware selection of relevant knowledge; went on MSP430, CC2430 is described in detail; Finally, node design, redundant design, and the torpedo tank positioned on the application are described.
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