Design And Implementation Of High Precision Three-dimensional Scanning System

With the rapid development of modern measurement technology and computer technology,high-precision three-dimensional scanners are gradually becoming the research focus in the field of modern three-dimensional measurement.In today's industrial production,three-dimensional scanning technology is widely used in all walks of life,especially in 3D printing,aeronautical blade detection,ancient relics restoration and so on.Most of the traditional three-dimensional scanners use the contact method for three-dimensional measurement,which has the disadvantages of low measurement accuracy and slow data acquisition,so they are not conducive to application in modern industry.At present,with the advent of the industrial 4.0 era,based on the high-speed development and integration of high-tech such as motion control,applied optics,machine vision and image processing,the three-dimensional scanning technology is constantly innovating and improving under the joint impetus of strong technical support and huge production demand.People can obtain the three-dimensional information of objective objects more accurately and efficiently.Therefore,the design of this system has very important theoretical significance and practical application value.This paper introduces the research status in the field of 3D scanning technology at home and abroad.Aiming at the problems of slow scanning speed and low measuring accuracy of three-dimensional scanning technology,a high-precision three-dimensional scanning system based on high-precision two-dimensional linear motor motion control system and spectral confocal displacement sensor for height measurement is proposed,which can improve the accuracy of three-dimensional scanning,at the same time accelerate the scanning speed,improve work efficiency,conducive to industrial applications.The hardware system of the high-precision three-dimensional scanning system designed in this paper mainly includes a high-precision two-dimensional linear motor motion platform based on PMAC motion controller and an optical displacement measurement system based on spectral confocal displacement sensor.The two-dimensional linear motor motion platform is mainly composed of computer,motion controller,motor driver,linear motor and position detection device,and the optical displacement measurement system is mainly composed of spectral confocal displacement sensor controller and optical probe.In the later system test experiment,the performance index of the system was analyzed by standard block scanning experiment.Then the representative three-dimensional texture leather samples were selected for the three-dimensional scanning experiment,and the actual working situation of the system was analyzed to prove the feasibility of the relevant theory and scanning method in the design process of the system.Through the analysis of experimental data and physical scanning results,the three-dimensional scanning system achieves the technical requirements of high precision,high resolution and high efficiency,and can be applied to high-precision three-dimensional scanning of surface contours of various complex and curvature-variable objects.It plays an important role in promoting the development of high-precision three-dimensional scanning technology,and has considerable application value and wide application prospects in the fields of industrial production and precision inspection.