关键词: 农机技能培训, 嵌入式, 流媒体, 内容分发网络, 课程点播, 终端设备

Abstract:  Agricultural machinery skill training was an important part of agricultural mechanization. In order to improve the convenience of farmers agricultural machinery skill training, the paper applied embedded, streaming media, content distribution network and software engineering development technology, developed the intelligent agricultural machinery skill training system. In terms of hardware, the terminal equipment was designed based on embedded RK3128. In terms of software, system realized the functions of agricultural machinery training course on demand, teaching live broadcast, resource recommendation, and big data analysis and so on. The application results showed that the terminal device could realize smooth play of 1 080 P streaming media. The average response time of 500 users of a single server accessing the home page concurrently was 2 507 ms, and the average response time of concurrent accessing the secondary page was 1 431 ms. Streaming media strategy could save 76.9% of network bandwidth. The system could effectively meet the online and offline learning needs of users and provided convenient and fast learning methods for users to carry out agricultural machinery skill training. The system had been popularized and applied in agriculture related areas of Beijing and Zhangjiakou, Hebei Province. The data survey showed that the application satisfaction had reached more than 90%, which was affirmed by users. The system provided a convenient means for agricultural machinery skills training, and provided important support for the improvement of agricultural machinery users skills, the efficient of agricultural production and the sustainable development of agriculture.

Key words: agricultural machinery skill training, embedded, streaming media, content distribution network, course on demand, terminal device