人造板静曲强度测试中不确定度评定

Evaluation of uncertainty in modulus of rupture tests of wood-based panel

测量不确定度是测量技术的重要概念,只要涉及到测量数据的场合,都不可避免地牵涉到测量不确定度。本文介绍了人造板静曲强度的测量不确定度评定的方法,并对实验室自制定向刨花板静曲强度进行测量不确定度的评定,得到实验室自制定向刨花板静曲强度为:σb=(60±3)MPa,其中扩展不确定度的包含因子kp=1.985,置信概率p=95%。

The measurement uncertainty is a very important concept,which is used every where to be measured.The method of uncertainty evaluation in modulus of rupture test of wood-based panel was introduced in this paper.According to evaluating the uncertainty in modulus of rupture tests of oriented strand board made in Laboratory,the value of MOR（σb） was（60±3）MPa,and coverage factor（kp）,confidence probability（p） of expanded uncertainty were 1.985 and 95% respectively.