| dc.description.abstract | The research ”Laser structure light applies to measure the surface and Three-dimensional structure of objects meticulously” develops a kind of fast and simple measurement method mainly. Monitor the change and form of the object surface automatically. This system has untouchable, non-destructive, erect the system quickly which also can measure the whole field land, not measures by the space limitation. However,the light source of this system comes from the laser light source, so it can do the long distance measurement that different from the measurement of shade law has distances restriction.
Take the photo image into computer and make analysis in MATLAB. We take the movements of the centroid law. We regard law of picture element as the basic principle of analysis, choose a datum point to regard as the reference point, calculates again that the position relative to datum point of other each point. That is to say how much picture element the position of other each point difference from the datum point. Convert the difference to the actual height again, Then it finish the measuring on surface of the thing to observe.
Correcting some, we measure and examine a complete level with this system. Because of complete level, while measuring the plane surface, theory value should have no level to rise and fall. And the biggest error which we get is about 7um (± 3.5um ). In addition, we have swept line structure on the whole object surface, and calculate out the whole change of object surface. The research approach can examine big range amount and to get the information of objects quickly. Because line structure light is extraordinary and tiny, so it can be use examines smaller lens camber, and smooth degree, 3D examined etc, more accurately. Finally, we introduce the triangular measurement law using in the pulse of Tien-di Chiou. Make the change of pulse in measurement, while they get the ‘chi’ adjacently. And analyze the pulse on time. | en_US |