市面上常見之電助動腳踏車所配備之控制系統，扭力補助時易造成馬達過度補助或補助不足的情形造成騎乘的不舒適感，且其機構大多厚至100mm~110mm，本研究將設計一創新型具扭力感測器之電助動腳踏車，經改良本研究室舊有的機構設計，並且利用扭力感測器及旋轉編碼器進行控制，除了減少馬達補助不當造成的不舒適感，改良之機構亦減少空間及重量，將電助動腳踏車之續航力大幅提升。
將控制系統及腳踏車整合完成後，在道路上進行實測，發現扭力感測器所量測到之扭力曲線會隨著騎乘者的習慣與特性而有所差異，因此本人設計出一理想控制曲線，希望藉此曲線作為控制的目標。將理想控制曲線加入到控制後，本人亦在兩組道路上進行實測，實際紀錄騎乘者腳踏曲柄位置、腳踏曲柄轉速、騎乘者腳踏扭力、馬達消耗之電流值，發現本電助自行車在平路上及6度以內的斜坡，能令騎乘者的踩踏的力道與所設定的理想控制曲線非常接近，在10度以上的斜坡，經實測發現馬達助力確實有幫騎乘者降低負擔，但受限於其最大的動力輸出功率，騎乘者並無法獲得與理想控制曲線相接近的踩踏感受。

The control system of the electric assistant bikes in the market usually offers more power or less power than that we need, and it often causes the uncomfortable feeling to rider. In addition, the thickness of its mechanism is too thick. The thesis will reveal the innovative design of electric assistant bike with torque sensor. By refining the existing design in our laboratory, we reduce the uncomfortable feeling caused by inappropriate control and the unneeded weight.
After control system and the mechanism are ready, the electrical assistant bike is tested on the road. The test result reveals that the torque data fetched by the torque sensor is different by alternative rider’s habit and characteristic. Hence, the thesis develops an ideal control curve. By referring the curve to be control datum, the control system let the rider feel comfortable on any normal road .Besides, on any slope less than six degrees, the rider can feel the same feeling. However, on any slope larger than ten degrees, the rider won’t get the same feeling as that given by the ideal control curve because of the power limit 350 Walt.

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