Coverage is one of the hot research topics in wireless sensor networks

which indicates sensing QoS by wireless sensor networks.Motivated by the existing coverage-enhancing algorithm of wireless multimedia sensor network

a new three dimensional sensor perception model is established and a coverage-enhancing algorithm based this model (TDPCA) is proposed.This algorithm divided the three-dimensional perception model into pitch angle and deviation angle

thus the best optimal pitch angle is calculated according the location of monitoring area and nodes

and then deviation angle is optimized based on particle swarm optimization

which eliminate overlap and blind perception area effectively.Experimental results show that compared with the existing three-dimensional cover-enhancing algorithm in wireless sensor network

sensation overlap area and blind spots may be eliminated by TDPCA

and thus ultimate coverage performance of the wireless sensor network can be enhanced.