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The existing electronic nose (e-nose) chamber has problems in design, such as large volume, unreasonable structure and so on, so it cannot be well used in handheld e-nose systems. Inspired by the structural characteristics of mammalian nasal cavity, seven design schemes of handheld e-nose bionic chamber for liquor recognition were proposed in this paper. Firstly, through fluid dynamics simulation, the effects of chamber shape and internal structure on airflow uniformity, flow velocity, air pressure and residual gas were compared comprehensively. On this basis, the bionic chamber with the best comprehensive performance was selected. Then, the selected bionic chamber and the ordinary square gas chamber were installed in the self-made handheld e-nose system and used in the identification experiments of six liquors. The results show that the selected bionic chamber has higher recognition rate. |
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