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测量不确定度是测量技术中的重要概念,用于表征合理赋予被测量的值的分散性。只要涉及到测量数据的场合,都不避免的涉及到测量不确定度。测量不确定度常由很多分量组成。有些分量可由一系列测量结果的统计分布进行估计,并用试验标准偏差表示。另外一些分量可基于经验或其他信息的概率分布加以估计,也可用标准偏差表述,测量不确定度从词义上理解,意味着对测量结果可信性、有效性的怀疑程度或不肯定程度,是定量说明测量结果的质量的一个参数。实际上由于测量不完善和人们的认识不足,所得的被测量值具有分散性,即每次测得的结果不是同一值,而是以一定的概率分散在某个区域内的许多个值。虽然客观存在的系统误差是一个不变值,但由于我们不能完全认知或掌握,只能认为它是以某种概率分布存在于某个区域内,而这种概率分布本身也具有分散性。测量不确定度就是说明被测量之值分散性的参数,它不说明测量结果是否接近真值。为了表征这种分散性,测量不确定度用标准〔偏〕差表示。在实际使用中,往往希望知道测量结果的置信区间,本文介绍了压敏胶180°剥离强度测量不确定度的评定方法,为其在膜材料领域的使用提供参考。
Measurement uncertainty is an important concept in measurement techniques and is used to characterize the dispersibility of values that are reasonably assigned to a measurement. As long as the occasion of the measurement data is involved, the measurement uncertainty is not avoided. Measurement uncertainty often consists of many components. Some components can be estimated from the statistical distribution of a series of measurements and expressed in experimental standard deviations. Other components can be estimated based on the probability distribution of experience or other information, and can also be expressed in terms of standard deviation. The measurement uncertainty is understood word by word meaning that the degree of doubt or uncertainty about the credibility and validity of the measurement result is A parameter that quantifies the quality of the measurement. In fact, due to imperfect measurement and people’s lack of understanding, the measured values obtained are scattered, that is, each measured result is not the same value, but a certain probability is dispersed in an area of many values. Although the systematic error of objective existence is an invariable value, since we can not fully cognize or grasp it, we can only think of it as being in a certain probability distribution in a certain region, and the probability distribution itself is also decentralized. Measurement uncertainty is the parameter that describes the dispersion of the value being measured. It does not indicate whether the measurement is close to true. To characterize this dispersion, the measurement uncertainty is expressed as a standard deviation. In practice, it is often desirable to know the confidence interval of measurement results. This paper introduces the evaluation method of the uncertainty of measurement of 180 ° peel strength of pressure-sensitive adhesive, and provides reference for its use in the field of membrane materials.