The invention provides a method for measuring the thermal resistance of fabric. The total thermal resistance of multilayer fabric is equal to the heat resistance of each layer of fabric and the heat resistance of the surface air layer on the surface of the fabric. The number of fabric is n, and the total thermal resistance of the same material in the 1 ~ n layer is measured in turn, and the total thermal resistance measured by the number of fabric and the number of the corresponding layers is measured. The linear regression results show that the regression coefficient is the thermal resistance of the single layer fabric, and the regression constant is the thermal resistance of the air layer on the upper surface of the fabric. The method provided by the method is linear regression by measuring the total thermal resistance of 1 to N layers of fabrics in turn, and the thermal resistance of the fabric is directly obtained and the thermal resistance of the air layer above is directly obtained, and the system error is solved by the heat resistance of air layer on the surface of the fabric instead of the air layer above the fabric in the traditional method. The test results show that the method of the invention improves the accuracy of measuring the thermal resistance of textile fabrics.
【技术实现步骤摘要】
一种面料热阻回归测量方法
本专利技术涉及一种面料热阻测量方法,尤其涉及一种纺织面料热阻回归测量方法。
技术介绍
面料热阻测量时,传统的测量法是按照ISO11092-1993、ASTM-F1868PartA及GB/T11048-2008的相关定义,由热板仪测量:首先测量热板仪空板热阻,再放置面料,测量面料及空气层的总热阻,之后再减去空板热阻,即为面料的热阻。然而,由于测量空板空气层热阻时,测量表面是金属,而面料表面则是多孔隙交错的纤维表面,其向外的热辐射力和空气流动状态是不同的。因此,将热板表面空气层的热阻等同于面料表面空气层热阻是一种假设。在热板仪测量薄型面料热阻时,常出现负值。
技术实现思路
本专利技术要解决的技术问题是如何准确地测量纺织面料热阻。为了解决上述技术问题,本专利技术的技术方案是提供一种面料热阻回归测量方法,其特征在于:多层叠加面料的总热阻等于各层面料热阻和面料上表面空气层的热阻之和;多层叠加面料的总热阻的计算公式如下:Rctn=nRcf+Rcf0其中:Rctn为多层叠加面料的总热阻;n为面料层数,n为整数;Rf为单层面料的热阻;Rcf0为面料上表面空气层的热阻;设面料层数为n,依次测量1~n层相同材质面料的总热阻,根据面料层数以及相应层数面料所测得的总热阻进行线性回归,得到的回归系数即为单层面料的热阻Rf,回归常数即为面料上表面空气层的热阻Rf0。优选地,所述n取4、5或6。优选地,当多层面料自然平铺叠加时,受重力影响,面料之间空气层计为零。本专利技术提供的方法通过依次测量1~n层数面料的总热阻,n为面料层数,进行线性回归,直接得到面料热阻及其 ...
【技术保护点】
1.一种面料热阻回归测量方法,其特征在于:多层叠加面料的总热阻等于各层面料热阻和面料上表面空气层的热阻之和;多层叠加面料的总热阻的计算公式如下:Rctn=nRcf+Rcf0其中:Rctn为多层叠加面料的总热阻;n为面料层数,n为整数;Rcf为单层面料的热阻;Rcf0为面料上表面空气层的热阻;设面料层数为n,依次测量1~n层相同材质面料的总热阻,根据面料层数以及相应层数面料所测得的总热阻进行线性回归,得到的回归系数即为单层面料的热阻Rcf,回归常数即为面料上表面空气层的热阻Rcf0。
【技术特征摘要】
1.一种面料热阻回归测量方法,其特征在于:多层叠加面料的总热阻等于各层面料热阻和面料上表面空气层的热阻之和;多层叠加面料的总热阻的计算公式如下:Rctn=nRcf+Rcf0其中:Rctn为多层叠加面料的总热阻;n为面料层数,n为整数;Rcf为单层面料的热阻;Rcf0为面料上表面空气层的热阻;设面料层数为n,依次测量1~n层相同材质面料的总热...
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