为提高倒车的安全性，提出了一种基于SOPC 技术的车辆电子后视镜系统，该系统具有后视摄像、双频超声波大范围测距、语音播报测距结果等功能。对系统中各硬件模块及其关键技术进行了详细的论述。关键词：电子后视镜系统；测距；双频超声波；OV6620An Electronic Vehicle Rearview Mirror System Based on SOPC DU Xiao1,2 ，ZHANG Chongxiong1 (1. Nanjing University of Science and Technology，Nanjing 210094, China；2. Yancheng Teachers College, Yancheng 224002，China) Abstract: This paper presents a design of an electronic vehicle rearview mirror system based on SOPC, which enhances the security of car backing. The system has several functions including back-sight camera, long-range double-frequency ultrasonic ranging, voice broadcast measuring result. The hardware modules and key technologies of the system are discussed in detail.Keywords: electronic rearview mirror system; ranging; double-frequency ultrasonic; OV6620