【摘要】 GB 38900-2020《机动车安全技术检验项目和方法》对机动车外廓尺寸测量提出了明确的要求。通过对机动车外廓尺寸测得值的不确定度评定,分析影响测得值的相关因素。依据规范JJF 1059.1-2012《测量不确定度评定与表示》,建立外廓尺寸测得值的测量模型,并对不确定度来源进行分析与评定,为机动车检测机构开展内部质量控制或实验室间比对提供参考依据。更多还原

【Abstract】 GB 38900-2020 " Motor Vehicle Safety Technical Inspection Items and Methods" puts forward clear requirements for motor vehicle outline dimension measurement. Through the evaluation of the uncertainty of the measurement results of motor vehicle outline dimensions,the related factors affecting the measurement results are analyzed. According to the standard JJF 1059. 1-2012 " Evaluation and Expression of Uncertainty in Measurement",the mathematical model of the measurement results of external dimensions is established,and the sources of uncertainty are analyzed and evaluated,which provides a reference for the vehicle testing institutions to carry out internal quality control or inter laboratory comparison.更多还原