大型飞机舱音记录器设计

大型飞机和其他多成员飞机需加装舱音记录器，所记录的各种语音信息可以和飞行数据记录器记录的数据信息一起为飞行事故调查提供全面科学的依据。针对中国目前舱音记录器技术落后的现状。设计研制了一套新型基于ARM9平台，采用嵌入式Linux操作系统的舱音记录器，可以装备大型飞机和其他多成员飞机使用，该记录器采用目前最为先进的主流开发平台，系统运行稳定、高效，选用性能优良的AMBE-1000声码芯片实现了语音信号高品质采集和回放。通过音频频谱分析显示，记录器的频率响应、失真度等指标优于国内外同类产品的技术指标，具有良好的实用性和推广应用价值。

Design of Cockpit Voice Recorder for Large Aircraft

The large aircraft and other multi-member aircraft need the installation of cockpit voice recorder （CVR）. The various voice message recorded by CVR together with the data from flight data recorder can provide a comprehensive scientific basis for the flight accident investigation. Based on China＇s current situation of behindhand technology in CVR area, we designed and developed a set of new-style ARM9-based CVR, using embedded Linux operating system, which can equip for the large aircraft and other multi-member aircraft. The CVR uses the most advanced mainstream development platform. The system runs with stability and high efficiency. Excellent performance of selected AMBE-1000 codec chip achieves a high quality voice signal acquisition and playback. The audio spectrum analysis shows that the frequency response, distortion, and other indicators of the recorder are all better than the technical indicators of similar products at home and abroad, which has an excellent practicability and application value.