Objective This research aims to effectively explore the non-uniform distribution of temperature and humidity inside the dense oven and realize the accurate perception of the baking scene,to solve the problem of multi-source data redundancy caused by excessive sensor points. Method A mobile intelligent dense oven was used as the research object to obtain a total of 861×24 discrete time series data of 24 temperature and relative humidity sensors during the baking cycle.With HSIC as the basis,the Bayesian data fusion principle was introduced.Based on the principle of information maximization,information gain rate,and configuration redundancy constraints,the priority ranking and quantity selection basis for sensor configuration were clarified,thereby establishing an optimal configuration strategy for multi-source heterogeneous sensors. Result There was a significant non-uniformity in the distribution of temperature and relative humidity field in the bulk curing barn,and there was a strong non-linear correlation among different regions.Based on the sensor optimization configuration strategy,a total of 12 sensor objects,namely S1,S5,S4,S6,S7,S8,S11,S16,S13,S14,S21 and S24,were selected under the condition of reducing the sensors by 50%.Compared with the original data,the RMSE after site optimization was 0.663 8,and the information gain rate (gr ) of temperature and relative humidity were 0.018 2 and 0.001 8,respectively. Conclusion The sensor configuration strategy developed in consideration of the non-uniform distribution of temperature and relative humidity in the bulk curing barn can effectively ensure the perception accuracy and information abundance of temperature and relative humidity,and can provide theoretical basis and technical reference for intelligent monitoring and control of the curing environment,the development of curing process for tobacco leaves of varying qualities,and the optimized design of curing barn structures.
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