智慧型手機之電能分享界面裝置設計

Abstract

近年來隨著智慧型手機等行動裝置的爆炸性發展，人們對於行動資訊的依賴越來越深，電能供應成為行動裝置所要面臨的重要課題。本論文設計的智慧型手機電能分享界面裝置，利用USB OTG（On-The-Go）規範之電能輸出功能，提供了一個智慧型手機電能交換及資訊溝通的平台，試圖利用閒置的行動裝置做為備援電能，將閒置行動裝置的電能分享給需要緊急使用的行動裝置，亦能同時監看雙邊行動裝置的電池狀態，並可於使用者應用程式選擇電能分享之方向。在硬體方面，因應設計目標研擬出三種硬體組態，並根據不同電路元件衍生出六種硬體電路實現方案，再根據電路佈局面積、功率消耗與建置成本等三個項目進行各實現方案之項目評估，以尋求較適當之實現方案，並詳述其硬體細部功能區塊。於軟體方面，透過階層設計之方式分析系統軟體設計架構，利用Android意圖篩選器自動判斷系統裝置是以何種模式與行動裝置連接，便可於行動裝置上僅安裝同一個應用程式，並自動執行相對應之使用者介面程序，增加了操作上的便利性。系統程式部分，微控制器依據系統操作動作決定系統狀態、控制電能分享方向與雙邊電池資訊之傳遞。最後再根據硬體要求與規格選擇適當之元件、確認系統操作組態、設計電路板尺寸、電路層配置設定、規劃元件放置、線路佈局以及電路銲接等電路實務設計步驟，進而完成本系統之實際電路成品實現。

This paper designed a system of Power-sharing interface for smart phone applications, which is the use of USB OTG (On-The-Go) power output function. This system tries to use the idle mobile device as a power supply and shares the power to the mobile device that requires urgent use. The system can also monitor the battery status of the mobile devices that connect on both sides of this system. And the user could select the direction of power sharing from the user application installed on the mobile device. In the hardware design, this paper developed 3 different configurations according to the design goals, and 6 solutions based on using different circuit components were derived from these 3 configurations. According to the circuit layout area, power consumption and component costs, the most appropriate solution was evaluated by smaller layout area, less power consumption and cost. The Android user application could automatically determine which mode of this system is connected to the Android device. The system program in the microcontroller determines the system states, the direction of power sharing and the battery information exchanging. According to the hardware requirements, this paper chose the appropriate components, system voltage and circuit board size, and made the decision of layer stacks, component placement, and then performed the wire routing. Finally, the implementation of this system could be made.