LAUSR

Abstract In recent years, pavement scanning technology based on three-dimensional structured light has been widely used due to its multiple advantages. However, structured light of interference fringe was rarely applied in pavement scanning because of the low image quality when scanning surfaces with large sizes. The purpose of this study is to design a pavement scanning system based on structured light of interference fringe. The system aims to acquire pavement fringe images with high quality, which contain the three-dimensional information of the objects to measure. The basic principle of the scanning system is described in this paper. A fringe generator, which adopts a new fiber fixing method, is manufactured. It can emit fringe with higher spatial frequency. Then, the system parameters are determined. The influences of fringe spatial frequency f0 and incident angle ɸ on the quality of fringe images are analyzed, which verifies the rationality of the design. The scanning system can be used to scan the pavement distress and obtain the relevant fringe images.