電動自行車扭力感測器之設計與分析

本研究著手於發展一款新式扭力感測器。本設計之扭力感測器於曲柄與五通軸之間增設部分零組件及扭簧，當騎乘者施加大踏力於踏板時，鏈輪與曲柄可有相對角位移之運動，再藉由此相對角位移轉換為環形磁鐵之軸向位移，並透過感測元件量測環形磁鐵之位移量，即可由單晶片計算得到騎乘者所施加的踏力值。本研究所設計之扭力感測器具有結構簡單且低成本之優點，並以方便施工、易於偵測扭力變化、避免改變使用者操作習慣為目的進行設計，藉此提升產品的附加價值，以利提升市場上的競爭優勢。本研究首先針對扭力感測器進行專利及相關文獻蒐集，根據扭力感測器的偵測方式和偵測位置加以歸類整理及分析，再以創新設計流程發展可變曲柄機構之設計方向。本研究透過電腦輔助繪圖軟體繪製電腦模型，同時確認運動模擬及干涉檢查，並配合電腦輔助分析軟體進行結構之應力分析，以確保其強度符合使用安全。本研究之相關成果已提出專利申請。

關鍵字

電動自行車；扭力感測器；螺旋運動；機構

並列摘要

This research devoted to develop a new type torque sensor. The torque sensor will added some components between crank and button bracket for this design. When rider put a big pedaling force on pedals, the motion of relative angular displacement will occur between chain wheel and crank. Then use the relative angular displacement change to an axial displacement of ring magnet, and measure the displacement quantity of ring magnet by sensor. The quantity of pedaling force can be counted by SCM. The torque sensor of this research has merits including simple stricture and low cost. Doing design with a view to simple to working, easy to detecting the change of torque, and avoiding changing the work custom for user. Herewith the surtax value of products is raised, and raises the competitive advantage for markets. This research collected patents and literatures about torque sensor. The collected articles were analyzed and classified according to the detection method and detectable portion of the torque sensor. This research will proceeded with some works such as construct the computer model, verify the motion simulation, and check the interference of model by CAD software, and enforcing the structural stress analysis to ensure its strength conform with safety usage by CAE software. New patent was booked for the outcome of this research.

並列關鍵字

electric bicycle ； torque sensor ； screw motion ； mechanism

參考文獻

[1] 台灣區自行車輸出業同業公會網站。出進口統計。上網日期：2012年5月28日。網址：http://www.tbea.org/

[2] 黃昱叡，電動輔助自行車在斜坡上之控制器設計與模擬，碩士論文，國立臺北科技大學車輛工程研究所，台北，2011。

[5] James Robert Mc Govern, “ELECTRICALLY ASSISTED PEDALLED BICYCLE”, U.S. Patent, US5662187, 1997.

[6] Paul B. MacCready, Jr., Pasadena; William J. Nicoloff, Northridge, “HIGH PERFORMANCE BICYCLE PROPULSION”, U.S. Patent, US5785735, 1998.

[46] Tntsuaki Tanaka, Kasai; Toshihiro Suhara, Taka-gun; Toshihiro Matsumoto, Kasai; Hiroaki Sagara, Kasai; Yoshihiko Maeda, Kasai, “ELECTRICALLY ASSISTED VEHICLE”, U.S. Patent, US6015021, 2000.

國際替代計量

電動自行車扭力感測器之設計與分析

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