Method and Improvement of Hardness Test of Heterogeneous Mattress
LIU Mei1,SHEN Li-ming1,LU Tao2,FANG Jiao-jiao1
1. College of Furniture and Industrial Design, Nanjing Forestry University, Nanjing, Jiangsu 210037, China
2. Nanjing Kingrate Kylin Home Collection Co.Ltd, Nanjing, Jiangsu 210032, China
Abstract Three optimization methods for the widely used EN 1957:2012 and QBT 1952.2-2011(LGA) test methods are proposed. First, two experimental comparison groups were set up:one group is 8 spring mattresses, the other is 8 foam mattresses. The loading deflection curves of each mattress were measured by a special tester, and these 2 groups of experimental mattresses were assumed. There were obvious differences in hardness and softness due to different materials. Secondly, the LGA test method and three optimization methods were used to measure the two groups of experimental mattresses. Finally, a better calculation method was obtained by using the between-group and intra-group t tests. The results show that the LGA test method and optimization method two are based on artificial regulations, and the test results are not unique; optimization methods two and three show that there is a significant difference in softness and hardness between the two groups, which is consistent with the hypothesis. The third optimization method is unique in the calculation of the mattress softness and hardness value, and is not affected by the testing equipment, it is an ideal optimization method.
LIU Mei,SHEN Li-ming,LU Tao, et al. Method and Improvement of Hardness Test of Heterogeneous Mattress[J]. Acta Metrologica Sinica, 2022, 43(11): 1470-1479.
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2022, Vol. 43 
