The Study Of Dynamic 3-D Profilometry System Based On FTP

Optical three-dimensional (3D) non-contact profilometry, with the excellence in high speed, high accuracy and easily controlled by computer, has been widely used and studied. In many kinds of activity 3D profilometry, Fourier Transform Profilometry(FTP) that requires only one frame of the deformed fringe pattern and one frame of reference fringe pattern makes real-time data acquiring and processing of dynamic process possible. Its foundation principle is to get the 3D shape sizes with the frequency characteristic of signal.3D shape measurement has been widely used in many fields, such as produce quality on-line detecting of industry pipelining, striking board geometry shape detecting, and intelligent robot movement controlling, locomotion mechanics. So it is on a very important status in the field of science study and project application.This paper firstly provides introduction of importance and current study condition of 3-D shape measuring technique. It summarizes the former study outcome, presenting several popular basic principles of actively optical 3-D transduction methods and comparing their merits and demerits. It gives high emphasis on principle and methods of FTP profilometry. Based on the above-mentioned methods, it acquires the fundamental principles of dynamic process 3-D FTP shape measuring technique, putting forward the elaboration of several 3-D phase calculation methods and 3-D unwrapping phase methods, and evaluating its function. Besides, this thesis probes into the difficult problem of phase, elaborating the raise of the problem, the present study condition and the arithmetic. Aimed at the measuring subject, it achieves a set of complete measurement technique plan, conducts analysis of collecting image data with appropriate data management method and fulfilled satisfying effect.