Method for optimizing two-dimensional aeoplotropism sensor network coverage

Abstract

The invention provides a method for optimizing two-dimensional aeoplotropism sensor network coverage, and belongs to the technical field of sensation. The method comprises the following steps: 1, initializing a sensor network, and calculating the initial coverage rate of a network according to the initial position, the sensation radius, the sector sensation direction angle, the sensation sector field angle and the like of a node; 2, setting the iteration times N to be 1; 3, setting a random disturbance angle for different sensor nodes so as to obtain disturbance angle vectors of the Nth iteration; 4, acquiring the coverage rates of the Nth iteration when a present network rotates on two positive and negative directions of the random disturbance angle vectors; 5, calculating approximate gradient values corresponding to the coverage rate functions, of the present different sensor nodes according to the disturbance angle vectors and the coverage rates of the Nth iteration; 6, updating the sensation direction angles of the different sensor nodes, completing the procedure when N is equal to a preset iteration times K, or else turning back to execute the step 3 when N is equal to N+1. By adopting the method, the optimal rotation angles of different sensor nodes of the two-dimensional aeoplotropism sensor network can be obtained, and the optimization efficiency is high.

Description

technical field [0001] The invention belongs to the field of sensor technology, in particular to a method for optimizing the coverage of a two-dimensional directional sensor network. Background technique [0002] With the continuous development of microelectronics technology and micro-electromechanical system (MEMS) technology, sensor technology, the most basic and important technology for information acquisition, has also made great progress. The sensor network is composed of a large number of cheap micro sensor nodes deployed in the monitoring area, and forms a multi-hop self-organizing network system through wireless communication. Its purpose is to cooperatively perceive, collect and process the perceived objects in the network coverage area. information and send it to observers. The coverage performance of the sensor network is an important index to measure the service quality of the sensor network, which directly affects the service quality of the whole network. Most...

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Problems solved by technology

[0003] In practice, the coverage performance of the sensor network will be affected by many factors. For example, due to the complexity of many application environments, the initial deployment of the network mostly adopts random deployment strategies such as sprinkling, throwing, and spraying, resulting in the distribution of nodes in the network. The large randomness can easily lead to uneven distribution of nodes; coupled with the random distribution of sensing directions of directed sensor nodes, the sensing range is limited, which makes it easier to form coverage holes and overlapping coverage in the sensing area, which will affect the quality of the network. Coverage performance; In addition, in the case of a large number of network nodes, there are many factors affecting network coverage performance and the relationship is complex, making it difficult to optimize

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