基于SmartRock的沥青路面隐蔽性裂缝智能识别与定位
Intelligent Recognition and Localization of Hidden Cracks in Asphalt Pavement Based on SmartRock
纪小平 1陈云 2李晓娟 3刘洪辉 4牟克亮 1周浩宇1
作者信息
- 1. 长安大学公路学院,陕西西安 710064
- 2. 长安大学公路学院,陕西西安 710064;长江师范学院土木建筑工程学院,重庆 408100
- 3. 陕西交控科技发展集团股份有限公司,陕西西安 710075
- 4. 西安公路研究院有限公司,陕西西安 710065
- 折叠
摘要
实时感知与精准诊评沥青路面服役状态是实施主动养护的基础,内嵌式无线传感是路面实时感知的前沿技术.基于路用无线自供电智能骨料(SmartRock),制备具有不同裂缝深度、宽度和位置(裂缝距跨中的水平距离)的SmartRock埋入式沥青混合料小梁试件,采用MTS进行不同荷载水平的三点弯曲重复加载,测试在动荷载激励下的SmartRock压电输出,研究裂缝宽度、深度与位置以及荷载水平对SmartRock压电输出的影响,构建沥青路面隐蔽性裂缝的尺寸感知与定位模型,提出并验证隐蔽性裂缝的尺寸智能感知技术与智能定位技术.结果表明:SmartRock压电输出峰值随裂缝深度与宽度的增加而降低,随裂缝位置偏移距离的增大而增大,即SmartRock压电输出峰值与裂缝深度、宽度及位置敏感,说明可用SmartRock压电输出峰值感知隐蔽性裂缝;建立了隐蔽性裂缝尺寸感知模型,基于多目标规划方法提出了隐蔽性裂缝尺寸感知技术,深度与宽度的感知精度分别为92.8％和95.3％;建立了隐蔽性裂缝定位模型,基于三点定位理论提出裂缝定位技术,定位精度为95.1％.研究成果为沥青路面隐蔽性裂缝的智能高精识别与精准定位提供了一种可行方法.
Abstract
Real-time perception,accurate diagnosis,and evaluation of the service state of asphalt pavements provide the basis for the implementation of their active scientific maintenance,with embedded wireless sensing being the frontier technology in real-time pavement perception.Based on the road wireless self-powered smart aggregate(SmartRock),beam specimens of the SmartRock-embedded asphalt mixture were prepared with different crack depths,widths,and locations(horizontal distance of the crack from the center of the span).Repeated loading tests at different load levels were conducted under three-point bending using mechanics test systems(MTS).The piezoelectric output of SmartRock was tested under dynamic load excitation.The effects of load level and crack width,depth,and location on the piezoelectric output of SmartRock were studied.A size perception and positioning model for hidden cracks in asphalt pavement was constructed,and intelligent size sensing and intelligent positioning technologies for hidden cracks were proposed and verified.The results show that the peak value of the SmartRock piezoelectric output decreases with an increase in crack depth and width,and increases with an increase in the crack position offset distance.The peak value of the SmartRock piezoelectric output is sensitive to crack depth,width and position,indicating that the SmartRock piezoelectric output peak can be used to perceive hidden cracks.A hidden crack size perception model was established,and a crack size perception technology was proposed based on multi-objective programming.The perception accuracies of crack depth and width are 92.8％and 95.3％,respectively.A crack localization model of a hidden crack was established,and crack localization technology was proposed based on the three-point localization theory,with a localization accuracy of 95.1％.This achievement provides a feasible technology for the intelligent high-precision identification and precise positioning of hidden cracks in asphalt pavements.
关键词
路面工程/隐蔽性裂缝/智能骨料/尺寸感知/精准定位Key words
pavement engineering/hidden crack/SmartRock/size perception/accurate positioning引用本文复制引用
出版年
2024
NETL
NSTL
万方数据