車用電腦是指安裝於車上的工業電腦主機，可讓整部車變成一
數位裝置，提供駕駛操控上的資訊協助，配合攝相鏡頭可做攝影機監
控，與相關偵測器的連結可幫助車輛自我安全檢測、車對車聯繫溝通
與遠端信息監控等處理。
本論文之主旨係針對車用電腦之散熱進行最佳化設計與分析，
論文內容首先介紹車用電腦之產業概況與應用，再探討車用電腦不同
一般主機的架構，其用金屬作為外殼的方式可做為主機板上之熱源良
好的散熱管道，在模擬分析中定義機殼的熱傳導係數(M)、機殼厚度
(T)、鰭片高度(H)及前後開孔率(O) ，並取三個Level 採用田口法
L9 直交表做Flotherm 散熱的模擬分析，並運用Minitab 比較數據找
到四項參數之最佳化組合為A2(熱傳導係數154W/mK)、 B3(機殼厚度
5.5mm)、C3(鰭片高度7mm)、 D3(開孔率30%)，再用分析軟體模擬分
析驗證，可證實經由田口方法所得到四組控制變因對系統設計的溫度
散熱效益最佳。本研究利用軟體Flotherm 及Minitab 找到系統散熱
設計的最佳化條件，可提供相關研發人員在做熱評估分析流程之參考，
並可依據實驗及實際情況進行調整，期能更精確地掌握設計的方向。

Vehicle computer is the industrial computer which is installed in the
car and could turns the car into a digital device and provide information
to assist the driver. With the camera lens and related detectors, it monitors
and provides self-testing for vehicle safety, vehicle-to-vehicle
communication and remote information monitoring..... etc.
This main objective of this dissertation is aimed at optimizing
thermal design of the vehicle computer. Firstly, we will introduce the
overview of the industry and application of the vehicle computer, and
secondly, discussed the differences between vehicle computer and
general computer architecture. The metal chassis of vehicle computer can
be a good cooling method for heat source on the mother-board. Therefore
in the simulation analysis, we defined the material of top chassis (M),
chassis thickness (T), the fin height (H) and front opening ratio (O), and
took three Levels by using the Taguchi method orthogonal table L9 for
thermal simulation analysis, using Minitab to compare the data to find the
best combination of the four parameters. which are the A2 (material is
AL6061), B3 (chassis thickness is 5.5mm), C3 (fin height is 7mm), and
D3 (opening ratio 30%).Ran the analysis software to verify the
temperature of the cooling efficiency verifiable via four control variables
which obtained from Taguchi method and the result proved it was the
best approach for the optimal system thermal design. In this study, by
using Minitab and Flotherm analysis software to find the optimal system
thermal design, the result served as reference for researchers to evaluate
v
and analyze thermal solution, making adjustment according to
experiments and the actual situation, we believe researchers can have
more accurate direction of design. the test results provide such referential
materials for researchers to evaluate and analyze the thermal solution, and
making adjustment based on the experiments and the actual situations
accordingly. We believe that this study can provide researchers with more
accurate idea of design.

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