汽車 AVM 系統 ECU Module 散熱分析研究

Abstract

近幾年ADAS（Advanced Driver Assistance Systems, ADAS）-AVM System (Around View Monitor) 環景影像系統持續的在汽車市場上推廣，環景影像系統可讓駕駛人於駕駛汽車時加大行車視野，去除視野死角，進而提升行車的安全性，而目前市面上環景影像皆為30萬畫素(VGA Pixel)，未來因應市場要求，車廠欲提供更清晰的影像給消費者，影像畫素會逐漸提升至百萬畫素(MEGA Pixel)，其中AVM系統的ECU (Electronic Control Unit) Module影像控制模組，因大量的圖資匯入後，工作溫度會越來越高。 因此本篇論文乃針對目前量產ECU Module做分析之外，更利用田口分析法、變異數分析法、ANSYS分析軟體，另外設計3款ECU Module，提升整體的散熱效率，藉此設計出可滿足下一代MEGA Pixel散熱需求的產品。

The around view monitor (AVM), which is employed in advanced driver assistance systems, is being increasingly used in the automotive industry. An AVM improves automobile safety by enabling drivers to view more of their environment and eliminating their blind spots. Commercially available AVMs have a video graphics array resolution of 300,000 pixels, which will be upgraded to the megapixel level in response to consumer demand. However, such resolution improvement will entail the input of considerable image data into the electronic control unit (ECU) module of the AVM, increasing the ECU module operating temperature accordingly. This study analyzed the cooling capacity of an existing ECU module used in AVMs and employed the Taguchi method, Analysis of variance, and ANSYS to design an ECU module with higher cooling efficiency. The proposed ECU module can be utilized in AVMs with megapixel resolution.