全國中小學科展

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工程學

情境照明之仿真控制研究

本作品為一種可選定不同時間地點模仿朝陽/夕陽之情境照明系統,包括複數個發光裝置、濾光及擴散片,選擇接近朝陽/夕陽頻譜的波長,亦即複數個發出紅光、黃光及紅外線的發光元件。本作品提出新的控制法則,透過計時器、繼電器與時序間隔調整控制器,連接各發光元件,控制它們的發光狀態,提供旭日東升、夕陽西下等模式,使用者可調整發光顏色變換的時間間隔,延長夕陽下山前一刻的美好畫面,可讓使用者充分領略夕陽之美。本研究並且可以依某一筆特定時空資料,計算情境變化過程之每一時間點對應於色度圖之軌跡點,即時比對特定時空資料其對應於色度圖之軌跡線,而得到與該軌跡點間兩種累計誤差為最小距離之計算值,並啟亮與該軌跡點相對應之該發光元件組合,如此達到不同時間地點之模仿朝陽/夕陽及雲彩之最佳情境照明效果。

浮體式波浪發電機模型之創作與應用

本研究為近海岸浮體式波浪發電設計,選擇理論推導與真實造波水槽測試,浮體式波浪發電設計概念,藉由一浮動載台將波浪運動能轉換為電能,而載台設計上利用浮體浮力,透過時規皮帶在浮體與活動掛重兩者中,產生時規皮帶的張力差,此刻的張力差與波浪的波高、週期與活動掛重三者產生連動效應,並有效率的將波能轉換為有用的機械能,最終再轉換為電能,本研究的波浪發電系統,當週期為1.5s、波高4公分時,有最佳週期平均發電效率為65%,依據模型相似理論縮尺為1/50,預估未來原型機組的最佳發電效率將發生在波浪週期10.6s、波高2公尺。

FABRICATION AND CHARACTERIZATION OF CARBON NANOTUBE DOPED PHOTOVOLTAIC CELLS

Nowadays, the increase in population and the rapid depletion of nonrenewable energy sources brings the need for energy. In this case, scientists are forced to develop technologies by using renewable energy sources. Sun is the unlimited and renewable energy source. Organic solar cells absorb the light from the sun by the active polymer layer and transform it into electrical power. Organic solar cells are advantageous than inorganic ones because of being low-cost, easy-to-use and proper for large scale applications. In this project, it is aimed to produce organic solar cells by using specific amounts of carbon nanotube (CNT) doping. According to this aim, it is detected by using the fluorescence spectroscopy that CNTs can be used in organic solar cells. Later, the homogenous distribution of doping SWCNT into donor material was displayed by AFM, and correct proportion of SWCNTs are chosen by those images. In order to increase the efficiency of organic solar cell SWCNT doped P3HT was used as donor molecule. The acceptor molecule was PCBM in here. Surface characterization of prepared samples was made by Atomic Force Microscope (AFM), while electrical characterization of them is done with airless environment cabin (glove-box) system in nitrogen environment. As a result, devices prepared with addition of cyclohexanone in P3HT: SWCNT%:PCBM new load paths to carbon nanotubes were provided, as a result of the measurements short circuit current obtained was raised from the reference to 53%. The best yields were found as 2.24% in 0.2% SWCNT doped devices. This result shows efficiency is healed according to the reference rate as 64%. In this study, certain amounts of carbon nanotube doped organic solar cells were produced, which are highly efficient rather than traditional organic solar cells and low cost, easy-to-produce rather than inorganic solar cells, by using environmentally friendly materials.

A Modular Comprehensive Assessment Platform for Aircraft Maintenance

We were very curious about whether the aircraft will suffer lightning damages during flight, so we tried to search the answer on the internet. According to the searching results, we realized that during flight departure, passenger planes can suffer lightning damage. As a result, there will be lightning strike points, which needs immediate solutions for safety concerns. Besides, we found out that the exterior aircraft components, such as aircraft body, wings, tail, turbine engine and other areas, are vulnerable to corrosion, which also needs immediate solutions. Luckily, we came across a chance to chat with the engineer who works in the airport. Through that meeting, we knew that the maintenance of the aircraft is very important. However, the maintenance of the components depends on professional technicians, weather, the surrounding noise level, and other environmental effects. As a result, we think that it is initial for us to develop a device that can automatically complete the missions of aircraft maintenance. Below are two objectives that we need to complete: 1. Complete a non-destructive testing for aircraft damage, including corrosion and lightning strike points. Assessment areas include: Aircraft body, airplane wings, tail of the aircraft and the turbine engine 2. Engage in scanning results to analyze and predict for flight readiness. The collected results will proceed to the aviation company for inspection and maintenance. Based on these two objectives, we designed an automatic platform for aircraft maintenance. Below are four innovations of this platform: 1. we developed a method to replace the current stage based on the manual operation of the aircraft maintenance, the use of AGV (Automated guided vehicle) and the robotic arm combination. 2. Design a modular platform based on this method, including telescopic four-wheel independent rotating chassis and locking mechanism, scissors lifting mechanism, double sided synchronous belt forward detection telescopic mechanism, etc. The platform can shrink at the minimum height of A320, convenient access to the machine abdomen. 3. The positioning algorithm of the platform relative to the aircraft is proposed.

SeedBot: Low-Cost Seeding Robot for Agricultural Applications

This paper presents a semi-autonomous seeding robot which is based on both electrical and mechanical platforms that perform advance agriculture process. SeedBot composed of four components: drilling mechanism, body of robot, seed container and paving mechanism. Other than those components the sensor system and the control system are also discussed. The aim of this study is designing and building a low-cost robotic system to automate and optimize process during farming especially for personal usage. This study demonstrates that semi-autonomous farming has crucial advantages over conventional farming. In addition to that, SeedBot provides safer, requires less manpower and precise farming than usual methods that we have so far.

震盪效應─輕微腦震盪警示系統的研究與實現

本研究主要針對造成輕微腦震盪 (Mild Traumatic Brian Injury, mTBI) 的現象及其物理量進行研究,以封閉式頭部工程旋轉加速度的撞擊模型 (Closed Head Impact Model of Engineered Rotational Acceleration, CHIMERA) 為基礎,結合目前常用於頭部碰撞量測的腦部受傷標準 (Head Injury Criterion, HIC),實現一套由加速度感應器和微處理機組成的可穿戴式輕微腦震盪警示系統。本研究利用此警示系統進行舞蹈和刺激性遊樂設施的實測,探討生活中容易被忽視卻對腦部造成傷害之危險動作。而研究中更提出多重衝擊模擬器的實現方法,此模擬器改善CHIMERA僅單次撞擊工程問題,並結合特徵檢測 (Feature Clarification) 及互相關 (Cross-Correlation) 的定性分析,提供更多元且更符合真實情況的資料,以達到輕微腦震盪警示之功用。最後再根據實驗結果提出警訊,以降低在日常生活中輕微腦震盪發生率。

聚乳酸/天然纖維複合材料之研究-探討加入玉米葉纖維對機械性質之影響

本研究以玉米葉纖維做為聚乳酸纖維的補強材料,並以加入的玉米葉纖維長度為操縱變因,探討其對聚乳酸/玉米葉纖維複合材料機械性質的影響。實驗設計以純聚乳酸為對照組,以加入1mm, 2mm, 5mm, 13mm玉米葉纖維的聚乳酸複合材料為實驗組。本研究以拉伸強度和耐衝擊值來判斷機械性質的強度。 實驗數據顯示,實驗組的拉伸強度與對照組差距不大,但在耐衝擊值卻比對照組高出許多。除此之外,拉伸強度和耐衝擊值都顯示加入2mm玉米葉纖維在實驗組擁有最佳的數值。另外,加入越長的玉米葉纖維反而不會擁有較佳的機械性質。未來期待聚乳酸複合材料能夠應用在更廣的層面。

可變倍率透鏡及其控制系統

Robotic Window Cleaner

My project is a robot designed to clean windows and eliminate the need for human labor. My ultimate aim for this project is to develop my robot to clean high-rise buildings as well as homes. The current version of my robot is designed to clean only house windows. The idea to invent a robot that would automatically clean windows came to me when I arrived home from school one day and found my father struggling to clean the outside of our living room windows because he suffers from back and knee pain. During my research I stumbled upon high-rise window cleaning accidents in which people have lost their lives and this gave my project greater purpose. The major challenge I faced when designing my robot was getting my robot to stick to a vertical window while maneuvering around its surface without falling off. My solution was to use vacuum technologies, suction cups and direct current motors in my design. My robot is made up of a mechanical system, an electronic system and a pneumatic system. The mechanical system consists of direct current motors that drive the two arms of the robot backward and forward through a rack and pinion enabling movement. The pneumatic system provides the vacuum that enables my robot to stick to the window and also consists of pistons that lower the suction cups onto the glass. The electronics system is made up of a microcontroller that uses transistors to control the robots various components. Some key features of my robot include the new split unit design which includes a cleaning unit and a control panel that allows for a decrease in the weight of the device, ultrasonic distance sensors for window edge detection and a self drawing cleaning progress map which the robot displays on the LCD screen on the control panel. Gauges have been added to monitor pressure and vacuum levels in the system so that the user is aware if a problem were to occur. The dual squeegee design includes a squeegee on either end of the horizontal arm which are raised and lowered at certain times while the robot maneuvers across the window to result in the most effective clean. Attached to the squeegees are microfiber cleaning pads that are used to clean the window. I plan to one day develop my robot to clean high-rise buildings so it minimizes the risk of workers losing their lives.

手機感測器之動作辨識與低頭族應用

低頭族發生『假性近視』、『脊椎側彎』甚至『黃斑部病變』等健康問題有越來越多的趨勢,邊走邊玩發生的意外也越來越多,因此,我們針對低頭族的健康與安全開發本作品。一、 健康方面: 撰寫「背景執行程式」,此程式完全不影響使用者玩遊戲、上網…等等,使用30分鐘後,透過「加速度感測器」檢測使用者必須做的手臂運動,完成後才可繼續使用手機,藉此『休息一下眼睛與僵化的手臂』。透過「環境光感測器」調整螢幕亮度,不讓螢幕光太強而造成眼睛更容易損傷。二、 安全方面: 「加速度感測器」與「陀螺儀」辨識出使用者邊走邊使用手機,就跳出提醒視窗暫時中斷使用者使用手機,使用者或許就會停下腳步或是抬起頭來恢復對環境的觀察能力以避免意外發生,按下「確定鈕」後,就可繼續使用。