【摘要】：隨著移動(dòng)技術(shù)的發(fā)展,移動(dòng)終端定位技術(shù)越來越受到人們的青睞。在室外,移動(dòng)基站,GPS等技術(shù)的發(fā)展使得定位技術(shù)越來越成熟并開始在人們的生活中扮演越來越重要的角色。而在室內(nèi),由于墻壁的阻隔,終端定位的精度急劇下降,更不用說定位建筑物內(nèi)部的某個(gè)區(qū)域。常用的室內(nèi)定位技術(shù)如紅外線、超聲波、藍(lán)牙等需要額外部署大量的硬件設(shè)備。近年來,無線局域網(wǎng)技術(shù)獲得了快速的發(fā)展,由于它強(qiáng)大的功能及其便捷性,在人們的日常生活中得到了廣泛應(yīng)用。由于無線局域網(wǎng)的普遍性,人們開始逐漸重視無線局域網(wǎng)在室內(nèi)定位中的應(yīng)用。本文描述的公安系統(tǒng)內(nèi)部定位系統(tǒng)就是基于802.11b的無線網(wǎng)絡(luò)構(gòu)建的。本文根據(jù)Wi-Fi定位的基本思想提出了系統(tǒng)的設(shè)計(jì)方案。本系統(tǒng)的主要設(shè)計(jì)思想是根據(jù)移動(dòng)設(shè)備的Wi-Fi指紋來確定終端設(shè)備的位置。首先,注冊室內(nèi)的各個(gè)AP(無線網(wǎng)絡(luò)接入點(diǎn))的信息;其次,在室內(nèi)的多個(gè)采集點(diǎn)采集各個(gè)AP的RSSI(信號強(qiáng)度)作為采集點(diǎn)的指紋,我們稱其為Wi-Fi指紋,然后將采集到的Wi-Fi指紋和采集點(diǎn)的位置信息存放入服務(wù)器;最后,當(dāng)終端設(shè)備需要定位時(shí),將終端的Wi-Fi指紋上傳到服務(wù)器,服務(wù)器根據(jù)預(yù)先采集的數(shù)據(jù)判斷出當(dāng)前終端所處的區(qū)域。按照該系統(tǒng)的設(shè)計(jì)思想,我們實(shí)現(xiàn)了該室內(nèi)無線定位系統(tǒng)。本系統(tǒng)由客戶端和服務(wù)端兩部分構(gòu)成。服務(wù)器端程序是在Windows平臺下進(jìn)行開發(fā),采用了多線程技術(shù),會(huì)存儲(chǔ)收集采集點(diǎn)的Wi-Fi指紋,并能根據(jù)終端的Wi-Fi指紋判斷終端位置。而客戶端程序是在Android平臺下進(jìn)行開發(fā),能采集Wi-Fi指紋數(shù)據(jù),與服務(wù)器交互,并顯示定位區(qū)域。開發(fā)所使用的Android系統(tǒng)能保證定位系統(tǒng)得到廣泛的推廣。為了能夠直觀地看到軟件的運(yùn)行效果,我們選擇AP較多的辦公樓作為測試地點(diǎn)。首先,我們登記了主樓某一層中各個(gè)AP的信息;然后,在各個(gè)待測試的教研室內(nèi)部署了各個(gè)數(shù)據(jù)采集終端,采集了定位系統(tǒng)所需的AP環(huán)境信息;最后我們在各個(gè)教研室內(nèi)的不同位置進(jìn)行定位實(shí)驗(yàn)。測試結(jié)果表明,該定位系統(tǒng)能較準(zhǔn)確的定位出終端的位置,具有較好的實(shí)用性。
[Abstract]:With the development of mobile technology, mobile terminal positioning technology is more and more popular. Outside, mobile base stations, GPS and other technologies make the positioning technology more and more mature and begin to play a more and more important role in people's lives. However, because of the wall barrier, the accuracy of the terminal location drops sharply, not to mention the location of a certain area inside the building. Common indoor positioning technologies such as infrared, ultrasonic, Bluetooth and so on require a large number of additional hardware devices. In recent years, wireless local area network (WLAN) technology has gained rapid development, because of its powerful function and convenience, it has been widely used in people's daily life. Due to the universality of WLAN, people begin to attach importance to WLAN's application in indoor positioning. The internal positioning system of public security system described in this paper is based on 802.11b wireless network. According to the basic idea of Wi-Fi positioning, the design scheme of the system is put forward in this paper. The main design idea of the system is to determine the location of the terminal device according to the Wi-Fi fingerprint of the mobile device. First, register the information of each AP (wireless network access point) of the room; Secondly, the RSSI (signal intensity) of each AP is taken as the fingerprint of the collection point at several indoor collection points, which is called Wi-Fi fingerprint, and then the collected Wi-Fi fingerprint and the location information of the collection point are stored in the server. Finally, when the terminal equipment needs to locate, the Wi-Fi fingerprint of the terminal is uploaded to the server, and the server determines the region of the current terminal according to the data collected in advance. According to the design idea of the system, we realized the indoor wireless positioning system. The system consists of client and server. The server-side program is developed on the platform of Windows. The multithread technology is used to store the Wi-Fi fingerprint of the collection point and to judge the terminal position according to the Wi-Fi fingerprint of the terminal. The client program is developed on the Android platform, which can collect Wi-Fi fingerprint data, interact with the server, and display the location area. The Android system developed and used can ensure that the positioning system is widely popularized. In order to visualize the running effect of the software, we choose more AP office buildings as the test site. First of all, we register the information of each AP in a certain floor of the main building, and then deploy each data acquisition terminal in each teaching and research room to be tested, and collect the AP environment information needed by the positioning system. Finally, we carry on the localization experiment in the different position in each teaching and research department. The test results show that the positioning system can locate the position of the terminal accurately and has good practicability.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP311.52;TN92

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本文編號：2345662