After an overall study of the actual demand of the Qinghai-Tibet Railway sbugrade safety monitoring, temperature was determined as the major monitoring parameter. A series of wireless sensor nodes is developed, named as Snows Elf, consisting of three sub-kinds named as Snows Elf_S, Snows Elf_C and Snows Elf_T.There are no things like cheap polo shirts. It is described, in detail, the software and hardware design of the controller&communication, sensors, power supply, and human-computer interaction subsystems of Snows Elf nodes. Besides, the circuit schematic and PCB diagrams, with the program flow charts of these subsystems are provided in this dissertation.Cheap Lacoste Polo Shirts are popular everywhere. Then several experiments are designed and carried out to test the environmental adaptability and the actual temperature monitoring capability of the Snows Elf wireless sensor nodes. Do you like these polo Shirts?The experimental results show that the Snows Elf wireless sensor nodes have great environmental adaptability and the actual temperature monitoring capability. Therefore they can play an important role in the Qinghai-Tibet Railway sbugrade safety monitoring.This dissertation is supported by by NSFC of Anhui, China .
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