The Non-contact Laser Measurement Code Disk Installation And Commissioning

Focus on the problems that the disk paths are easily damaged by the probe, and the distortion will be brought into the signals because the contact measuring method is mainly adeptly in measuring the axial end beat error and the time of measuring the radial eccentricity is long in installing and debugging the disk. Moreover, the difficulties met in installing and debugging the disk are successfully by using the non-contact measuring method. Firstly, the measuring principle of the optical triangulation is introduced and the basic working principle of the linear CCD is researched. Moreover, the LD is used as light source, and the optical focus system, imagery system and mechanical system are designed, thus, non-contact photoelectric measuring system with linear CCD as the photoelectric switch component and micro processor as the control core is completed. The point-blank optical triangulation is adopted as the basic measuring principle of the measuring system. Moreover, the linear CCD is used as the photoelectric switch component and is connected with the computer by the data collecting card, and the object is measured by the system with the computer as the mainly displaying control center. The structure designment of the measuring head, the compensation of the systemic non-linearity, the analysis of the effect on the measuring precision caused by the laser intensity, the diameter of the measuring light beam and the shape of the facula are discussed detailedly. At last, the corresponding improving project is brought forward according to the error source of the measuring system. The CCD is composed of the photosensitive cells with high density and is used as the photoelectric switch component of the measuring system, and the imagery cells of the ordinary CCD are ranged from several microns to dozens of microns. But the resolution of the instrument will be limited by the space between the imagery cells when the requirement of the measuring precision is very high, so a kind of method to improve the precision of the linear CCD is brought out in terms of the algorithm. Thus, the subdivision of the CCD is realized and the resolution of the instrument is improved to a grade. The system can be used in installing and debugging the disc and also in measuring the micro displacement of the object, the surface shape and thickness of the object, so it has fairly applied value.