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针对目前缺少激光断面仪的计量检定方法,且传统比对试验方法可靠性低的情况,基于激光断面仪的工作原理,分解国际平整度指数的计算过程,在数据试验分析的基础上,采用在同一试验平台道路条件下,应用模块化高程变换技术,通过不同位置点高程的有序变化实现了检定激光断面仪动态特性所需要的不同路面平整度试验条件,消除了道路环境对试验结果的影响,借助高精度水准仪和激光测距仪的溯源途径解决了国际平整度指数溯源的要求。所建计量标准试验道路提供的检验量值重复性达到了设计要求,经过半年时间的稳定性考核,量值稳定可靠,不确定度分析结果证明整套检定装置的相对不确定度为1%。
Aiming at the lack of metrological verification method of laser profilometer and the low reliability of the traditional method, the calculation of international smoothness index is decomposed based on the working principle of laser profilometer. Based on the experimental data analysis, The same test platform road conditions, the use of modular elevation transformation technology, through the orderly changes in elevation at different locations to achieve the dynamic characteristics of the laser cross section instrument testing required for the different road surface roughness test conditions, eliminating the impact of road environment on the test results , With the help of traceable sources of high-precision level and laser range finder to solve the requirement of traceability of international flatness index. The test standard provided by the measurement standard test road repeatability reached the design requirements, after six months of stability assessment, the value of stable and reliable, the results of the uncertainty analysis shows that the relative uncertainty of the entire testing device is 1%.