由於科技的發展和應用對人類的影響日趨廣泛而深遠，1921年，人類發明了第一支導盲杖；一百年後，縱使我們手中的手機推陳出新，但盲人用的還是導盲杖，盲人擁有的輔助科技還在原地踏步。雖然目前身障礙者有許多輔助工具能改善行動上的不便，但卻大多是單價相當高的產品。本論文主要是設計一個低成本超音波智能輔助盲人杖來改善盲人杖使用效能：在導盲杖中加入超音波感測模組、雙超音波感測模組及伺服馬達掛載超音波感測模組，並實驗其各別效能。經實驗，伺服馬達掛載超音波模組，以機械轉動偏掃方式進行測距告警，有效感測上下範圍增加30度，改善單一超音波模組垂直感測範圍，避免雙超音波模組相互干擾，另懸空障礙物實驗中，可感測最小面積至25平方公分，及在感測距離200公分的條件下，無盲區感測達到面積13225平方公分。 Recently, the development and application of technology has been far-reaching and has created a wide impact on people's lives. We invented the first guide cane in 1921. Information and digital techniques have made large progressive strides in the recent century; however, the blind still use the conventional guide cane, which means that assistive technology of the blind has not made any progress.Although there are many assistive tools that can alleviate the inconvenience of actions, most related products are very expensive. To enhance the effectiveness of the state-of-the-art blind cane, this Thesis proposes an innovative design of a low-cost ultrasonic smart assisted blind cane. Mainly, the proposed guide cane has mounted an ultrasonic sensing module, a dual ultrasonic sensing module, and a servomotor. Experiments are performed for assessing its performance.The proposed guide cane had the servomotor mounted with an ultrasonic module and using mechanical deflecting rotation for distance warnings in the guide cane resulted in an increase of 30 degrees in both the upper and lower bounds of the effective sensitivity, when compared to vertical sensing range of a single ultrasonic module. We could also avoid the mutual interferences between the dual ultrasound modules. Further, in the experiment of suspended obstruction, the area of the minimum sensing was 25 square centimeters, and for a distance of 200 cm, the area was 13,225 cm2. As a result, we effectively reduced the ultrasound blind spots.