使用Wi-Fi與G-Sensor實現即時倒車影像傳輸之研究與分析

機構典藏 > College of Engineering > Graduate Institute & Department of Electrical Engineering > Thesis > Item 987654321/105839

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/105839

Title:	使用Wi-Fi與G-Sensor實現即時倒車影像傳輸之研究與分析
Other Titles:	The research and analysis of using 802.11 and G-Sensor to implement real-time rear view transmission
Authors:	吳宗原;Wu, Tsung-Yuan
Contributors:	淡江大學電機工程學系碩士班李維聰;Lee, Wei-Tsong
Keywords:	IEEE 802.11n;省電機制;倒車影像;樹莓派;IEEE 802.11;Power Save Mechanism;Rear View Camera;Raspberry Pi
Date:	2015
Issue Date:	2016-01-22 15:06:34 (UTC+8)
Abstract:	隨著網路的發展及相關的技術已經日漸成熟，現今在社會上的各個角落都能看到網路的應用，如：自動櫃員機、手機、家電…等。隨著這些應用的增加以及技術越來越成熟，可以預見網路的未來是無可限量的。網路又可分為有線網路及無線網路，無線網路相較於有線網路有許多優點，如：安裝容易、覆蓋範圍大、擴增容易…等。因此無線網路非常適合用在線路裝設不易的地方，如：車輛、交通節點、機關單位…等。汽車是當今最普遍的交通工具，隨著汽車工業的進步以及車輛數目的提升，如何加強車輛的安全性是個非常重要的議題。對於車輛的安全性，除了考量汽車本身的結構安全外，提供駕駛可靠的輔助機制亦是非常重要的部分。每年有數百萬人因車禍受傷或死亡，顯見車輛安全的問題不容小覷。各國對於這樣的問題都積極的再尋找方案，力圖能夠增加車輛的安全性，例如：在美國便規定所有小於 10000 磅以下車輛，都必須要安裝有倒車影像系統。由此可知，倒車影像是個值得重視的議題。在本論文中，為了讓建立倒車影像的技術門檻降低，避免因為安裝不易而無法獲得車輛的安全性。因此建立了一套基於無線網路傳輸的倒車影像系統，藉由無線傳輸的方式減少安裝線路的不便，並提出相關的省電機制，增加無線設備在有限電源的使用時間。此外，為避免因省電機制降低系統的即時反應能力，另提出了一輔助機制來減少省電機制對反應能力的影響。經由模擬實驗的結果顯示，透過本論文中所提出的機制，在不同的使用情境，能夠有效的增加電源使用時間，並維持相當程度的反應能力。 With the development of network and related technology has become more mature, now we can see the network applications in everywhere of the community, such as ATMs, mobile phones, home appliances and so on. With the increase of network applications as well as technology becomes more mature, we can foresee the future of the Internet is limitless. Network can be divided into wired network and wireless network, wireless network compared to a wired network has many advantages, such as easy to install, cover a wide range, amplified easy and so on. Wireless network thus ideal for use in difficult line installation place, such as vehicle, transportation node, institution and so on. Car is the most common means of transport, along with the progress of the automotive industry as well as increase of number of vehicles, how to enhance the safety of the vehicle is a very serious issue. Regarding to the safety of vehicle, in addition to considering the structural safety of the car, provide reliable auxiliary mechanism to driver is also a very important part. Millions of people injured or killed in a car accident, it is obvious that the issue of vehicle safety can not to be sniffed at. Because of the issue, the world-side countries are actively looking for solution to enhance the safety of vehicle. For example, the U.S. Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) issued a final rule requiring all vehicles under 10,000 pounds, including buses and trucks, manufactured on or after May 1, 2018, to come equipped with rear visibility technology. Therefore, the rear visibility technology is a topic worthy of attention. In this paper, in order to decrease the technical threshold of establish the rear visibility system and avoid the hard installation to cause that can’t obtain the safety of vehicle. Therefore, we established a rear visibility system based on wireless transmission. By means of wireless transmission to increase the convenient of wiring and proposed a related power save mechanism to enhance the life time of wireless device in limited power. In addition, in order to avoid the system real time reaction capability decrease with power save mechanism, we proposed another auxiliary mechanism to reduce the effect that cause by power save mechanism. In addition, in order to avoid immediate saving mechanism to reduce system reaction capability, and the other proposed mechanisms to reduce the impact of an auxiliary power mechanism of response capabilities. The results show through simulations, through the mechanism proposed in this paper, the use of different scenario can effectively increase the life time of power and maintain a considerable degree of responsiveness.
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