摘要
裂缝测量技术在公路桥梁、文物保护、工业生产等方面有重要应用需求。然而很多情况下,目标难以直接接触,这对测量造成极大困难。此外,现有测量工具大多体积较大,不利于随时随地进行测量。针对测量的便携性和非接触特点,提出了一种基于平行激光的裂缝宽度测量视觉系统。设计了平行激光器,利用手机计算平台对裂缝宽度进行测量,并对激光的平行度、拍摄倾角、拍摄距离等对测量误差的影响做了分析。该测量系统无需激光测距仪和专用的计算设备,使得设备成本和体积大幅降低。研究表明所设计的便携式视觉系统能够实现裂缝宽度的高精度非接触测量,所用手机和平行激光器在30 cm处测量精度为0.1 mm。
The crack measurement technology has important application requirements in highway bridges, cultural relic protection, and industrial production and so on. However, it is hard to directly touch the target, which brings extreme difficulty for target measurement. In addition, most of the existing measuring tools are large in size and are not conducive for measuring at anytime and anywhere. To achieve the portability and non-contact characteristics of measurement, a vision measurement system based on parallel laser is proposed in this paper. A parallel laser is designed, and the width of the crack is measured by the mobile computing platform. The influence of the laser parallelism on measurement error, shooting inclination and shooting distance are analyzed. The measurement system does not need laser range finder and special computing equipment. Therefore, the cost and volume of the equipment are greatly reduced. This study shows that the method can achieve high accuracy non-contact measurement result of crack width. The measurement accuracy of the mobile phone and parallel laser is 0.1 mm at 30 cm.
作者
刘伟
周建行
杨延西
Liu Wei;Zhou Jianhang;Yang Yanxi(College of Automation and Information Engineering,Xi’an University of Technology,Xi'an 710048,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第11期235-243,共9页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(61703331)
国家重点研发计划(2018YFB1703000)
陕西省教育厅基金(17JK0561)项目资助。
关键词
平行激光
裂缝测量
便携式
parallel laser
crack measurement
portable
作者简介
通信作者:刘伟,2005年于西安交通大学获得学士学位,2013年于西安交通大学获得博士学位,现为西安理工大学讲师,主要研究方向为计算机视觉和机器人。E-mail:liuwei@xaut.edu.cn;周建行,2017年于沈阳工程学院获得学士学位,现为西安理工大学硕士研究生,主要研究方向为计算机视觉与机器人技术。E-mail:zhoujianhang8023@gmail.com;杨延西,2003年于北京信息科技大学获得博士学位,现为西安理工大学教授,主要研究方向为复杂系统控制,机器视觉和智能机器人。E-mail:yangyanxi@xaut.edu.cn。
