工程學

車床實習課程中，「角度偏心」技能於教科書資料不多，網路查尋資訊亦少，而此難度高技能所製作產品是迴旋轉直線運動曲柄軸機構所應用。 原始點分析為一種創作情境思維模式，此模式起源於問題產生時之因果關係。專題理論發想源自夾持偏心軸系定位關係及幾何學中「圓」切線性質。此發想讓我們研擬出兩項車製角度偏心核心調校關鍵技術；一是夾頭夾持軸系與工件維度所在軸系定義；二是工件量測位置定義。 依二項技術需求，本組設計出一套輔助定位模組；且經由實驗證明此模組貢獻度是解決車床角度偏心調校問題及對曲柄軸達成簡易快速定位角度量測功能。效度上明顯已達突破性調校應用。對於車床加工人員，提供調校操作簡易方便且精度控制顯著性高的選擇。

The surgical mask has been our daily companion since the outbreak of the Corona pandemic. The nonwovens (outer layers, not the filter membrane) from which the surgical mask is constructed consist of very long and thin polypropylene fibers. This leads to the question of whether microplastics are released during breathing through the surgical mask, which could enter the respiratory tract or the lungs. This would have a negative impact on our health, depending on the size of the detached fiber fragments - the smaller the worse because they can enter much deeper in our respiratory tract. In order to investigate the question of whether fiber fragments are released during breathing through a surgical mask, a filtration device was built. The filters were examined under an optical microscope after filtration. If fiber fragments would detach from the surgical mask, they would be found on the filter. Different surgical masks were tested, those that were not worn at all to surgical masks that were worn all day. It was found that fiber fragments were coming off the surgical masks. There were different fiber fragment types. Some fiber fragments were still undamaged (exhibited nice fractures), while others were frayed. Clump-like fragments occurred, but also smaller fine fiber fragments. All these different fiber fragments had a certain size, so that they could be called microplastics. The remarkable result of the whole study is that there is a direct correlation between the wearing time of the surgical mask and the number of detaching fiber fragments. In the case of the unworn surgical masks, 10 times fewer fiber fragments occurred during filtration than in the case of the surgical masks that were worn all day.

旋葉之細部結構跟泵浦效率有密切的關連[1,2]，本研究專注探討不同幾何形狀旋葉構型之效應，我們先利用3D列印快速成形之技術優勢，做出50種不同的旋葉，分別有圓弧形、橢圓弧形及直立形進行實驗測試，並計算其總效率找出最高值的旋葉，編碼為A2-ea281-ia279-8。 將最高值旋葉，套入田口法進行優化，目標是望大。經過信噪比及均值分析後，發現影響總效率之最大參數是旋葉數，其次是出口角，最後是入口角，田口法中得出，重新設計的更細部參數的最佳旋葉是A2-ea28-ia23-8，同時利用機器學習建立迴歸函數模型，透過訓練的模型，預測出效率值，最後經過COMSOL Multiphysics軟體模擬檢測出A2-ea28-ia23-8依然保持最佳的內部流場狀況，並運用自行設計之簡易透明泵浦，進行測試與印證。

本研究藉由孔洞抽氣控制氣流邊界層，影響尾部渦流以達到減阻效果。研究主要探討的變因有:孔洞大小、抽氣速率，進而發想抽吸設計是否可運用在旋轉圓柱上。實驗與之前不同的是為抽氣孔洞加裝導管，以及創新的實驗旋轉裝置。實驗結果顯示，透過延緩邊界層分離可以有效控制阻力，在雷諾數15000時，可減阻。抽氣速率達22m/s，減阻最大值達23%。此實驗想法可有效達到減阻效果，並且可以使旋轉葉片減少旋轉阻力，在電壓6V時，轉速提升11%。未來期望能應用在風力發電機葉片上，減少旋轉風阻，提升發電效率。

人們每天依靠著車輛往來各地，在帶來各種便利的同時，卻也伴隨著各種安全隱憂。本研究想要預防因駕駛轉向過於劇烈所導致的車輛翻覆行為，因此設計自動控制系統以避免車輛因轉向過於劇烈所導致的車輛翻覆行為。本研究利用車輛模型模擬轉向時車輛側向加速度的變化，根據模擬結果設計控制策略。控制目標為希望能降低車輛轉向時的側向加速度，進而避免翻車。控制策略分為門檻式控制策略與連續控制策略。控制系統輸入訊號為車輛側向加速度，而輸出訊號為車輛左右兩後輪馬達的扭矩訊號。控制系統只需要偵測車輛的側向加速度即可推得車輛轉向的時間點，並在車輛有較高可能翻覆時，根據控制策略予以車輛馬達扭矩輸出訊號的限制，避免轉向時側向加速度過高導致翻車。

CanSat (a can-size satellite) flight data revealed the occurrence of high spin angular velocities along the vertical axis of a CanSat during a parachute descent phase. A novel aerodynamic stabilization system of deployable fins was designed to decrease angular velocity. Deployable fins were attached to servomotors (rotary actuators) to provide control authority during the CanSat descent phase. Deployable fins positions were calculated based on an onboard gyroscope data using a PID (proportional-integral-derivative controller) regulator and a moving-average filter. After the assembly and the initial testing, the system was flight-proven by dropping it from a drone with and without enabling the stabilization system

The country of Nepal, although beautiful, is facing many challenges due to its geography, lying between the towering Himalayas and the vast plains of Terai. The narrow mountain roads, prone to landslides and poor infrastructure, often result in frequent accidents. This situation is worsened by the delayed emergency response, as accidents are often reported much later than the time they occur. In the past ten years, over 15 major bus accidents have killed hundreds of people, and in 2024 alone, more than 80 deaths were reported. In response, the "Third Life" project was developed to improve emergency response time and save lives.The project has two main components: first, a device equipped with GSM (Global System for Mobile Communications), a GPS module (Global Positioning System), a gyroscopic sensor, and a microcontroller to detect accidents in real-time within seconds of the incident. Second, once an accident is detected, live coordinates are sent directly to emergency services and police stations for immediate assistance.This project is not only vital for Nepal but also for countries with similar terrain and infrastructure challenges. The "Third Life" project aims to save many lives that are lost due to delayed reporting, ensuring quicker emergency responses.A tragic example of this was the 2024 Trishuli bus accident, where many lives were lost when the bus plunged into the river. To date, the bus has not been recovered. Our project aims to create a waterproof device that, when connected to a satellite, will send live coordinates to emergency services, ensuring 100% reliability. This device could help locate the bus, which is still missing, within seconds.Ultimately, this initiative offers more than just safety it restores peace of mind and hope for the families of victims, providing them with a chance for a better future despite the tragedy.

單晶矽被認為是製造太陽能電池的最佳材料，因為它在地球上儲量豐富且具有優異的光電性能，但其大量的應用受限於其成本和轉換效率。 單晶矽太陽能電池通常通過將單晶矽晶柱切割成350到450微米的切片來製造。現有的技術方法無法將其縮小到更小的規模，因此其發展面臨著開發複雜製造工藝和高單晶矽片生產成本的障礙。近來，在便宜玻璃基板上製備的薄膜太陽能電池成為重要的發展方向，可以減少矽層厚度來降低成本和材料消耗，同時可以有效減少載流子的複合，進一步能夠提高轉換效率。 本研究成功通過電漿輔助化學氣相沉積在玻璃基板上生長出非晶鍺薄膜，並利用雷射退火將非晶鍺薄膜轉化為多晶鍺薄膜，接著將進一步發展控制退火過程溫度的時間空間演化，以進一步做出高品質單晶鍺與矽薄膜，並應用在超薄膜太陽能電池上

我們設計了一款透過壓電片與摩擦片收集資料的智慧鞋，壓電片嵌入在鞋底，摩擦片安裝在前腳掌，兩者並聯。當人行走時，感測器會被擠壓變形，藉由DAQ（數據採集）收集感測器的電壓輸出，可顯示出正常步行、快走、慢跑和漫步等活動的訊息，利用時變電壓形式的輸出數據，與能夠識別時域信號的CNN深度學習（卷積神經網絡）進行不同類型步態辨識。 實驗結果顯示此方法可以辨檢測這四種步態，其辨識率高達95%。訓練好的CNN可同時辨識個人身份與步態。結果顯示，識別快走時辨識率極高，識別正常步行和漫步時辨識率為90%，識別慢跑時辨識率僅達49%。因此，我們未來預計將提高同時辨識不同受試者與不同步態之辨識率，並透過壓電能量擷取器為藍牙模組供電。

Safe CrossWalk (SCW) is an innovative solution designed to enhance pedestrian safety at crosswalks, addressing the alarming issue of 270,000 pedestrian fatalities worldwide each year. By integrating advanced sensors, artificial intelligence, and real-time communication, SCW creates safer and more efficient urban environments. The system comprises three key components: SCW Strisce, a smart crosswalk device that detects pedestrian movement; SCW Car, a vehicle-integrated system that alerts drivers; and SCW AI, which processes data to optimize traffic flow and safety measures. SCW offers a proactive approach to reducing accidents through detection, alerts, and data-driven optimization. The solution not only improves safety but also supports urban planning by providing valuable insights into pedestrian and vehicle behavior. SCW aligns with the growing demand for AI-driven technologies in Smart Cities, presenting a scalable and cost-effective model for implementation. By fostering collaboration with municipalities and insurance companies, Safe CrossWalk aims to transform urban mobility, saving lives and creating smarter, safer cities.