【摘要】：無(wú)線傳感器網(wǎng)絡(luò)的基本任務(wù)是對(duì)指定的事件和信息進(jìn)行感知檢測(cè),因此監(jiān)測(cè)性能與覆蓋問題成為通用的無(wú)線傳感器網(wǎng)絡(luò)的設(shè)計(jì)應(yīng)用中的熱點(diǎn)研究問題。目前關(guān)于這方面的研究,研究有了大量的理論成果,但這些理論的結(jié)果仍存在以下幾大缺點(diǎn):(1)大多數(shù)利用的是布爾模型,并且模型的建立中忽視了環(huán)境噪聲和信號(hào)衰減。(2)大多采用單點(diǎn)感知模型,忽略了多個(gè)傳感器接收到的信號(hào)之間的空間相關(guān)性(3)大多數(shù)研究都是基于理想二維平面,而無(wú)線傳感器網(wǎng)絡(luò)的實(shí)際應(yīng)用目前數(shù)量已經(jīng)擴(kuò)展到三維空間,這很明顯與實(shí)際不符。本文針對(duì)無(wú)線傳感器網(wǎng)絡(luò)在信息感知和事件檢測(cè)方面的實(shí)際應(yīng)用特點(diǎn)和需求,考慮被測(cè)信號(hào)數(shù)據(jù)特征,環(huán)境因素和節(jié)點(diǎn)分布的影響,重點(diǎn)研究無(wú)線傳感器節(jié)點(diǎn)的感知模型和網(wǎng)絡(luò)的覆蓋問題�？紤]在噪聲環(huán)境下,利用無(wú)線傳感器節(jié)點(diǎn)接收數(shù)據(jù)之間空間相關(guān)性,建立三維空間下兩點(diǎn)聯(lián)合檢測(cè)的感知單位模型。在此基礎(chǔ)上,結(jié)合基于多面體密鋪的空間覆蓋模型構(gòu)造算法,提出結(jié)合兩種理論的更為高效的三維空間覆蓋方法。在提出覆蓋方法的基礎(chǔ)上,再使用軟件仿真進(jìn)行結(jié)果分析,驗(yàn)證,并與傳統(tǒng)方法進(jìn)行效率對(duì)比。比起傳統(tǒng)的空間檢測(cè)覆蓋問題,本文有如下幾個(gè)創(chuàng)新點(diǎn):1.總結(jié)了傳統(tǒng)感知模型的不足,采用了考慮了環(huán)境噪聲和信號(hào)衰減前提下的概率模型。2.考慮了節(jié)點(diǎn)與節(jié)點(diǎn)之間接收到信號(hào)的空間相關(guān)性。3.建立的是在三維空間下的單位感知模型。4.在得到單位感知模型之后,介紹了如何對(duì)其如何使用布點(diǎn),以達(dá)到高效覆蓋的算法。使用本文研究的檢測(cè)方法與布點(diǎn)方案,可以在實(shí)際應(yīng)用時(shí)節(jié)省傳感器節(jié)點(diǎn)使用數(shù)量,達(dá)到高效使用傳感器節(jié)點(diǎn)的效果,具有一定的實(shí)踐指導(dǎo)價(jià)值。
[Abstract]:The basic task of wireless sensor networks is to detect specific events and information. Therefore, monitoring performance and coverage problems have become a hot issue in the design and application of wireless sensor networks. At present, there are a lot of theoretical results in this field, but the results of these theories still have the following shortcomings: (1) most of them are Boolean models. And the environmental noise and signal attenuation are ignored in the establishment of the model. (2) most of the research is based on the ideal two-dimensional plane, and the spatial correlation between the signals received by multiple sensors is ignored. However, the actual application of wireless sensor networks has been expanded to three dimensional space, which is obviously not in accordance with the actual situation. In view of the practical application characteristics and requirements of wireless sensor networks in information perception and event detection, this paper considers the effects of data characteristics, environmental factors and node distribution of measured signals. This paper focuses on the sensor node perception model and network coverage. Considering the spatial correlation between the data received by wireless sensor nodes in noisy environment, a sensing unit model for joint detection of two points in three dimensional space is established. On this basis, a more efficient three dimensional space coverage method based on two theories is proposed by combining the algorithm of constructing space coverage model based on polyhedron. On the basis of the coverage method, the results are analyzed and verified by software simulation, and the efficiency of the method is compared with that of the traditional method. Compared with the traditional spatial detection coverage problem, this paper has the following innovations: 1. The disadvantages of the traditional perception model are summarized, and the probabilistic model, which takes environmental noise and signal attenuation into account, is adopted. 2. The spatial correlation of received signals between nodes and nodes is considered. 3. 3. A unit perception model in three dimensional space is established. 4. After getting the unit awareness model, this paper introduces how to use points to achieve efficient coverage. By using the detection method and the layout scheme studied in this paper, the number of sensor nodes can be saved in practical application, and the effect of using sensor nodes efficiently can be achieved, which has certain practical guiding value.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5;TP212.9

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