Abstract：In view of the problem that complicated fault diagnosis algorithm was not applicable due to the limitation of node system resources in the greenhouse wireless sensor network, a method based on the network framework was proposed to diagnose the fault type of sub-node by looking up the fault diagnosis decision-making table. The resource-rich sink node was taken as hinge to identify the sub-node fault sign online. The decision-making table was redundant due to the sub-node fault sign and fault types were con- structed from the point of view of system and module. The heuristic fault diagnosis reduction algorithm for consistent data of sub-node was designed on rough set to reduce the redundancy, and then a more concise fault diagnosis decision-making table of sub-node was established. The results show that the online simple fault diagnosis based on rough set is realized and the system resource of sub-node is saved.
2009, Vol. 30 
