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本文研究不同蒙皮材质的热舒适性对轮椅坐垫舒适度的影响,并建立电动轮椅坐垫舒适度数学模型。测量蒙皮材质分别为黑尼龙布、皮革、渔网布的轮椅坐垫与人体接触面的温度、相对湿度及被测试者的坐姿调整时间,并对轮椅坐垫热舒适性进行主观问卷调查。实验结果表明蒙皮材质为渔网布的坐垫最舒适,尼龙布的次之,皮革的最差,实验得出客观数据分析结果与主观得分具有一致性。本文基于反向传播神经网络(BP神经网络)算法建立了温度、相对湿度与舒适度主观评分之间的数学模型,可以为轮椅设计及使用者选择轮椅提供客观参考。
In this paper, the effect of thermal comfort of different skin materials on wheelchair comfort is studied, and the mathematical model of comfort of electric wheelchair cushion is established. The temperature, relative humidity and the sitting time of the tested person on wheelchair cushion and human contact surface of black nylon cloth, leather and fishing net cloth were measured respectively. The subjective questionnaire was also conducted on the thermal comfort of wheelchair cushion. The experimental results show that the skin material is the most comfortable cushion for fishing net cloth, the second is nylon cloth, and the worst is leather. Experiments show that the objective data analysis results are consistent with subjective scores. Based on backpropagation neural network (BPNN) algorithm, this paper establishes a mathematical model between subjective scores of temperature, relative humidity and comfort, which can provide an objective reference for wheelchair design and user selection of wheelchairs.