道路动态弯沉计算因子测量不确定度分析

doi:10.3969/j.issn.1000-1158.2020.10.15

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摘要弯沉计算因子是衡量落锤式弯沉仪(FWD)弯沉测试准确性的重要技术指标。为解决弯沉计算因子的不确定度评定方法问题,通过确定弯沉计算因子的定义,建立测量模型,确定了标准弯沉传感器、FWD测量重复性以及线性拟合模型3个主要不确定度分量,提出了校准环境的地基弯沉及环境条件要求。经试验验证,一台性能稳定的落锤式弯沉仪,其弯沉计算因子的扩展不确定度一般在1.0%～3.0%之间,其中线性拟合斜率是弯沉计算因子测量不确定度的主要影响因素。

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	窦光武
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关键词 ：计量学, 弯沉计算因子, 落锤式弯沉仪, 测量不确定度, 线性拟合斜率

Abstract：The deflection calculation factor is an important technical index of the FWD accuracy. In order to evaluate the measurement uncertainty of the deflection calculation factor, the definition of deflection calculation factor was determined, and the measurement model was established, the standard deflection sensor, FWD measurement repeatability and linear fitting model were determined as the three main uncertainty components, and the foundation deflection and environmental conditions of the calibration environment were recommended. The experiment result showed that the expansion uncertainty of the deflection calculation factor of the FWD with stable performance was generally between 1.0% and 3.0%, and the linear fit slope was the main influence factor for the measurement uncertainty of the deflection calculation factor.

Key words： metrology deflection calculation factor FWD measurement uncertainty linear fit slope

收稿日期: 2019-06-05 发布日期: 2020-10-10

PACS:

TB931

基金资助:中央级公益性科研院所基本科研业务费专项(2018-9028)

作者简介: 窦光武(1981-),男,安徽郎溪人,高级工程师,从事交通运输领域专用仪器设备的计量测试技术研究。Email: gw.dou@rioh.cn

引用本文:

窦光武,苗娜,刘璐,张冰. 道路动态弯沉计算因子测量不确定度分析[J]. 计量学报, 2020, 41(10): 1273-1278.
DOU Guang-wu,MIAO Na,LIU Lu,ZHANG Bing. Measurement Uncertainty Evaluation for Calculation Factor of the Road Dynamic Deflection. Acta Metrologica Sinica, 2020, 41(10): 1273-1278.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.10.15 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I10/1273