建構無線感測傳輸於即時監控電動自行車之動力系統

Constructing the wireless transmission for the real-time monitoring of the power system of E-Bike

李韋民(Wei-Min Lee)

指導教授 ： 魏清泉

朝陽科技大學/資訊學院/資訊與通訊系/碩士(2017年)

摘要

電動自行車是一種新的且有前途的城市交通工具選擇，它們提供常規自行車的所有優點，例如運動、零排放和高機動性，同時消除自行車的嚴重缺點:缺乏動力。基本上電動自行車只是一個常規的自行車新增電力系統及馬達以動力輔助騎者，因此電動自行車動力系統的即時監控對於騎者是有意義的。故我們嘗試構築一個無線感測傳輸用於即時監控電動自行車的動力系統的狀態。
在本文中，我們使用霍爾感測器、踏板感測器和力矩感測器等感測器來感測電力系統的一些參數，例如電池狀態、馬達電壓和電流、馬達轉速以及PWM等。電力系統的主要部分是直流無刷馬達，由DC電源供電，其產生AC電力信號以驅動馬達。因此，我們將密切關注直流馬達的工作狀態。
此外，還監測駕駛模式，如speed，exercise，normal，tour或eco模式。所有這些相關參數傳輸到ARM處理器（Cortex-M0）進行計算，然後通過藍牙傳輸到LCD面板進行顯示。 Modbus用作傳輸中的通信協議。或者，可以用手機代替LCD面板，對騎者來說是相當方便的。此外，通過手機和網際網路這些參數可以發送到遠程監控中心。因此，實現了對電動自行車的電力系統的即時監控的目標。這些記錄的數據描述了騎者的習慣和電力系統的特性。這些資料是大而有用的，他們值得進一步分析，以改善電力系統的設計。

關鍵字

電動自行車 ； 無線感測網路 ； 動力系統 ； 直流無刷馬達 ； Modbus

並列摘要

E-Bike (Electric bike) is a new and promising alternative of urban transportation. They provide all the advantages of a regular bicycle, such as exercise, zero emissions, and freedom from gridlock, while eliminating the bicycle's serious drawbacks, lack of power. Basically, an E-Bike is just a regular bicycle with an additional electric motor to help the rider. Therefore, it is significant about the real-time monitoring of the E-Bike power system for the rider and the remote monitoring center. We thus try to construct a wireless transmission for the real-time monitoring of the status of E-Bike’s power system.
In this paper, we use sensors like Hall-effect sensor, pedal sensor, torque sensor, etc. to sense some parameters of power system, such as battery status, motor voltage and current, motor rotating speed, PWM (Pulse Width Modulation) pulse of motor, etc. The major part of the power system is the brushless DC motor, that are powered by a DC electric source via an integrated inverter/switching power supply, which produces an AC electric signal to drive the motor. As a result, we will pay close attention to the working condition of the DC motor.
In addition, the driving modes, like speed, sport, normal, tour, or eco mode are also monitored. All these related parameters were transmitted to the ARM processor (Cortex-M0) for computing, and then to LCD panel for display by Bluetooth technology. The Modbus was used as the communication protocol in the transmission. Alternatively, the LCD panel can be replaced by the mobile phone; which is friendly used for the riders.
Furthermore, by mobile phone and internet these parameters can be sent to the remote monitoring center. As a result, the goal of the real-time monitoring of the power system of the E-Bike will be approached. These recorded data describe the habit of the rider and the characteristics of the power system. Since they are massive and useful, they deserve to be further analyzed to improve the design the power system.

並列關鍵字

E-Bike ； wireless sensor network ； power system ； brushless DC motor ； Modbus

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