基於情境感知之閱讀照明系統設計與實現

Design and Implementation of Lighting Systems for Reading with Context Awareness

蔡秉衡(Bang-Han Tsai)

指導教授 ： 黃永發

朝陽科技大學/資訊學院/資訊與通訊系碩士班/碩士(2013年)

摘要

本論文提出一個具情境感知(Context-Awareness)之閱讀照明系統(Illumination System)，本文應用兩個超音波(Ultrasonic Sensor)感測器，取得使用者之閱讀(Study)、休息(Relax)與小睡(Nap)三個情境之感測值，針對三個之情境辨識，我們提出軟決策(Soft Decision, SD)正確率93%，大幅改善硬決策(Hard Decision, HD)90%之情境辨識正確率。為去除外界可能之雜訊干擾，以移動平均視窗(Moving Average Windows)處理後，更可改善正確率達98%。此外，我們依據所辨識結果調整燈光之照度，讓使用者在閱讀、休息與小睡情境均獲得適當之照度，在能量消耗的比較上，與傳統燈光系統比較，我們的系統可節省16%的能量消耗，另外，當加入外部光源(或日光)的干擾時，本系統均能調整到各情境所需之最適照度。

關鍵字

情境感知 ； 超音波感測 ； 情境辨識 ； 軟決策 ； 移動視窗 ； 最適照度

並列摘要

In this thesis, a context aware system is investigated for reading. The experiments are performed by two ultrasound sensors to obtain the users’ three scenarios of study, relax and nap. In this thesis, we proposed soft decision (SD) method for three contexts to improve the accuracy rate of contexts recognition to 93% comparing with the 90% of hard decision (HD) method. In addition, to remove the external noise or interference, the moving windows (MW) are proposed to further improve the accuracy rate to 98%. After the contexts are recognized, the illuminations are adapted to the illumination for contexts by lighting systems. The results show that our system can meet the three scenarios of illumination. In energy consumption with comparing traditional lighting, our system can save 16% of energy consumption. Moreover, with adding an external light source, the proposed lighting system is able to adjust to the desired illumination for the Contexts as well.

並列關鍵字

Desired illumination ； Soft decision ； Moving windows ； Context recognition ； Ultrasonic sensing ； Context aware

參考文獻

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