Abstract
Target sensing and information monitoring using wireless sensor networks have become an important research field. Based on two-dimensional plane research, information monitoring, and transmission for three-dimensional curved target events, due to the uneven deployment of nodes and failures in sensor networks, there are a lot of coverage loopholes in the network. In this paper, a method of detecting and repairing loopholes in monitoring the coverage of three-dimensional surface targets with hybrid nodes is proposed. In the target monitoring area where the hybrid nodes are randomly deployed, the three-dimensional surface cube is meshed, and the coverage loopholes are gradually detected according to the method of computational geometry, and then, the redundant mobile nodes around the coverage loopholes are selected. According to the calculated distance to cover the moving direction and distance of the loophole, the virtual force is used to adjust the mobile nodes to repair the coverage loopholes. Simulation results show that compared with other algorithms, this algorithm has a higher utilization rate of mobile nodes, uses fewer nodes to complete coverage, reduces network coverage costs, meets the overall network coverage requirements, and has lower mobile energy consumption and longer network life. The actual scene further verifies the good connectivity and high coverage of the whole network.
Highlights
Wireless sensor networks (WSNs) that are coordinated and communicated with each other and consist of multiple microsensor nodes are wireless coverage networks
We present a novel coverage control algorithm based on Particle Swarm Optimization (PSO)
The second is to analyze the relationship between the coverage loophole repair rate and the number of sensor nodes with different proportions of mobile nodes
Summary
Wireless sensor networks (WSNs) that are coordinated and communicated with each other and consist of multiple microsensor nodes are wireless coverage networks. (1) The coverage of the 2D plane is extended to the 3D surface, a probabilistic coverage model of the 3D surface is proposed, and the coverage and connectivity of the 3D surface are detected (2) Using the method of computational geometric graph theory to detect the coverage loopholes of the 3D surface, the algorithm is executed to calculate the repair path and direction, and the redundant nodes are moved to repair the coverage loopholes according to the effect of the virtual force (3) Verified by simulation experiments, the effectiveness and coverage of the algorithm in this paper are verified, and compared with the 3D-DVFA algorithm and the 3DSD algorithm, the algorithm in this paper has higher coverage loophole detection rate and repair rate and actual scenarios are set up to verify network connectivity and coverage issues. The design steps of the three-dimensional surface coverage loophole detection and repair (3D-SCHDR) algorithm in this paper are summarized.
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