Portable vision crack measurement system based on parallel laser

被引：0

作者：

Liu W. ^{[1
]}

Zhou J. ^{[1
]}

Yang Y. ^{[1
]}

机构：

[1] College of Automation and Information Engineering, Xi'an University of Technology, Xi'an

来源：

Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 11期

关键词：

Crack measurement; Parallel laser; Portable;

D O I：

10.19650/j.cnki.cjsi.J2006451

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

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. © 2020, Science Press. All right reserved.

引用

页码：235 / 243

页数：8

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