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Title: | 多天線車載資通訊智能車之實現―結合低功耗藍牙系統、無線射頻辨識系統與無線區域網路系統 Multi-Antenna Smart Automotive System Using Bluetooth Low-Energy, Radio-Frequency Identification and Wireless Fidelity Techniques |
Authors: | Kuo-Jiun Ning 甯國駿 |
Advisor: | 毛紹綱(shau-gang Mao) |
Keyword: | 藍牙,多天線主輻射波束掃描技術,智能車系統,Keyless Entry車載系統, Bluetooth,beam-scanning antenna technique,smart automotive system,keyless entry system, |
Publication Year : | 2016 |
Degree: | 碩士 |
Abstract: | 本論文提出了一套應用於購物商場之智能車系統,使得此系統亦可搭載於實際汽車上,實現Keyless Entry車載系統。智慧商場系統包含手機應用程式與貨架藍牙裝置、無線網路技術、無線射頻辨識技術與新穎性之多天線車載資通訊技術。多天線車載資通訊技術主要是透過低功耗藍牙4.0來實現,並整合了自行設計高指向型圓極化天線、天線開關、射頻放大器、藍牙模組與微控制器。無線網路技術則透過無線網路模組與商場雲端伺服器進行資料上載與分析。無線射頻辨識技術則使用無線射頻辨識模組、900 MHz圓極化天線與可減少誤判率的增強設備來具體實現。智能購物車可同時與兩個使用者手機透過藍牙進行連線並共享數據。手機會掃描在貨架上的小型藍牙裝置,實現室內定位的功能。智能車上高指向型圓極化天線,搭配演算法,可以使其順暢自動跟隨手機。當商品置入於智能購物車中時,手機也會同時接收到智能車上的商品資訊,並即時顯示商品資訊。而車上所裝設之特殊設計的RFID增強設備,將使得車內空間電磁場分佈更加均勻且集中,無論使用者隨意擺放商品到車內皆能順利讀取。賣場伺服器會接收智能車上傳的商品資訊進行自動結帳並分析消費者購買習慣與商品銷量統計,藉此提升賣場營收。此外,透過雲端系統進行倉儲管理,可大幅減少人力成本。Keyless Entry車載系統則沿用智慧商場智能車系統的天線開關、射頻放大器、藍牙模組與微控制器。考慮實際車體淨空區的限制,將改以傳導波形式的天線設計。並實現兩位車主在汽車內與外的定位功能,搭配藍牙白名單功能,讓車主在不用拿出手機的情況下,也可以自動偵測手機位置以開啟車主所在位置對應的車門。另外,系統中搭載了10.5 GHz的都普勒雷達模組,避免車主不當開車門造成車禍。期盼有朝一日這兩套系統能融入人們日常生活中,增加生活便利性與行車安全性的同時,也實踐萬物連網之精神。 This thesis presents a multi-antenna smart automotive system for use in shopping mall and the keyless entry vehicle systems, in which the smart automotive system consists of mobile App, Bluetooth module, Wireless Fidelity (Wi-Fi) module, radio-frequency identification (RFID) module, and the beam-scanning multi-antenna module. The beam-scanning multi-antenna module is consisting of the six circularly-polarization antenna with high efficiency and gain, a double-pole six-throw antenna switch module, RF amplifier, Bluetooth module, and microcontroller. The mobile phone App is established to integrate with the smart automotive system and indoor localization system in the shopping mall application by using the received signal strength indicator (RSSI) in Bluetooth low energy technique. The six high-gain and high-efficiency circularly-polarization antenna is installed on the side walls of shopping cart, in which the enjoyable target-tracking scenario is obtained by switching the antenna. The product information in the shopping mall is displayed in the mobile App instantaneously, such as the product price and the food calorie. To reduce the read error rate in RFID, the metamaterial surface is proposed and constructed with a 915-MHz circularly-polarization antenna and RFID module to form an energy booster without any active device. A warehouse management server of shopping mall is established and constructed with a Wi-Fi module. In the shopping scenario, when user takes the product into the shopping cart, the tag on the product will be detected by the transponder in RFID. Then MCU will arrange the product information and send to mobile App and server via the Bluetooth and Wi-Fi module to do the self-checkout and warehouse management by the customer and operator. The beam-scanning multi-antenna technique can further apply to form the keyless entry vehicle system. Comparing with the presented keyless entry vehicle system using the non-radiative techniques, the proposed system using the Bluetooth low energy technique exhibits the more convenience due to the transmission distance. In the keyless entry scenario, the door lock and power lock are automatically unlocked by using RSSI, in which the determination is based on the indoor or outdoor regions. To increase the automotive safety, the radar module is further utilized to construct with the proposed multi-antenna smart automotive system. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/78098 |
DOI: | 10.6342/NTU201602901 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 電信工程學研究所 |
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ntu-105-R03942086-1.pdf Restricted Access | 12.8 MB | Adobe PDF |
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