| 路面平整度对标线逆反射测试的静态影响 |
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| 引用本文： | 何华阳,苏文英,王蕊. 路面平整度对标线逆反射测试的静态影响[J]. 中国公路学报, 2022, 35(5): 211-220. DOI: 10.19721/j.cnki.1001-7372.2022.05.020 |
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| 作者姓名： | 何华阳 苏文英 王蕊 |
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| 作者单位： | 交通运输部公路科学研究院, 北京 100088 |
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| 基金项目： | 交通运输行业重点科技项目(2018-ZD5-035);中央级公益性科研院所基本科研业务费专项资金项目(2018-9029) |
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| 摘 要： | 为了明确路面平整度对道路交通标线逆反射亮度系数测试的静态影响机理,减小工程应用中的误差,针对手持式逆反射测量仪和车载式逆反射测量仪,在忽略仪器测量基准平面偏差的前提下,参考公路工程质量检验评定标准中路面平整度“最大间隙”的要求,分析路面平整度影响下的现场测试几何条件,提出逆反射标线板设计方案及其参考值赋值方法,开展手持式逆反射测量仪和车载式逆反射测量仪的测量偏差试验。在逆反射标线板参考值赋值过程中发现,反射照度随着入射角的增大而降低,同逆反射亮度系数随入射角变化产生的变化趋势呈非线性关系。手持式逆反射测量仪和车载式逆反射测量仪无法识别入射角产生的偏差,仅通过测得的反射信号强度计算得到逆反射亮度系数,因此其变化趋势和反射照度随入射角变化的趋势相近。入射角偏差对车载式逆反射测量仪测量结果引入的相对不确定度ur22为4.8%,对开放光路的手持式逆反射测量仪测量结果引入的相对不确定度ur12为7.4%。研究结果表明：入射角偏差对道路交通标线逆反射亮度系数的现场测量结果影响较大,在现场测量时应注意调整仪器的放置位置;车载式逆反射测量仪较手持式逆反射测量仪抗干扰的能力更强,在路面平整度较差的路段选用车载式逆反射测量仪并进行数据修正能够提高测量结果的可信度;建议车载式逆反射测量仪选取9 m内最大高程差不超过7 mm的路段进行现场自校准。
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| 关 键 词： | 交通工程 静态影响 不确定度分析 道路交通标线 逆反射测量仪 入射角 路面平整度 |
| 收稿时间： | 2020-07-08 |
Static Influence of Pavement Roughness in Measuring Coefficient of Retroreflected Luminance in Road Traffic Markings |
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| HE Hua-yang,SU Wen-ying,WANG Rui. Static Influence of Pavement Roughness in Measuring Coefficient of Retroreflected Luminance in Road Traffic Markings[J]. China Journal of Highway and Transport, 2022, 35(5): 211-220. DOI: 10.19721/j.cnki.1001-7372.2022.05.020 |
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| Authors: | HE Hua-yang SU Wen-ying WANG Rui |
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| Affiliation: | Research Institute of Highway Ministry of Transport, Beijing 100088, China |
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| Abstract: | To elucidate the static influence of pavement roughness when testing retroreflective road traffic markings and reduce the errors in engineering applications, the geometric conditions for field tests involving a handheld retroreflectometer and a vehicle-mounted retroreflectometer were analyzed, considering the influence of pavement roughness and neglecting the deviation of the reference plane. The maximum clearance, index of pavement roughness during inspections, and evaluation quality standards for highway engineering were used as the reference. The deviations in the measurements of the handheld retroreflectometer and the vehicle-mounted retroreflectometer were compared. When assigning the reference value for the retroreflective reticle, it was noted that the reflected illuminance decreases with an increase in the incident angle; furthermore, the coefficient of retroreflected luminance has a nonlinear relationship with the incident angle. The handheld retroreflectometer and the vehicle-mounted retroreflectometer were unable to obtain information regarding the deviation in the incident angle when calculating the coefficient of retroreflected luminance. These instruments calculate the coefficient of retroreflected luminance based on the measured reflected signal intensity alone; hence, the trend of its change is similar to the trend of the reflected illuminance with the incident angle. The relative uncertainty, ur22, introduced by the deviation in the incident angle, for the measurement results of the vehicle-mounted retroreflectometer is 4.8%, whereas the relative uncertainty, ur12, for the results of the handheld retroreflectometer is 7.4%. Moreover, the results indicate that deviations in the incident angle have a significant impact on the results of field measurements for the coefficient of retroreflected luminance of road traffic markings; it is, therefore, necessary to adjust the placement of the instrument during on-site inspections. Compared to the handheld retroreflectometer, the vehicle-mounted retroreflectometer is more robust to interference. Hence, selecting a corrected vehicle-mounted retroreflectometer can improve the reliability of measurement results for roads where the pavement roughness is not ideal. Prior to the tests, self-calibration of the vehicle-mounted retroreflectometer is necessary, and the maximum elevation difference should not exceed 7 mm within a 9-m-long road section. |
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| Keywords: | traffic engineering static effect uncertainty analysis road traffic marking retroreflectometer incident angle pavement roughness |
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