针对我国气调保鲜包装技术及应用的落后状况，采用Mix9001气体混合器、CMV-2气体比例分析仪、DQB-700N气调包装机及PLC控制器，构建了基于气体在线检测与比例控制的智能气调包装系统。利用气体比例分析仪监控气体组分，PLC控制气体混合器和气调包装机，实现包装容器保鲜气体的比例混合和充气包装。实验表明，该系统可自动实现包装袋保鲜气体的比例混合和充气包装，减少了保鲜气体的耗气量，提高了工作效率，同时省却了传统气调包装的真空气室。

In allusion to the backward state of technology and applications of modified atmosphere packaging (MAP) in our country, an intelligent MAP system based on reliable measurement and control of gas concentration in packaging was constructed, which included Mix9001 gas mixer, CMV-2 gas analyzer, DQB-700N vacuum packaging machine, and PLC controller, to realize gases blending proportion in container and gas-filled package. The experiment results showed that this system not only obviates the traditional vacuum chamber, but also reduces gas consumption and improves working efficiency with automatic gases blending proportion and gas-filled package.