Today in industrial environment people requires flexible accurate and user friendly measuring equipment. This can help in measure in both environments development as well as in manufacturing. Now there are so many optical measurement devices which work on white light or laser scanning technique. Engineering applications now require the fast and accurate measurement of complex shapes and geometrical features using highly mobile 3-D sensors that can be adapted efficiently to objects of differing sizes
Without compromising flexibility, speed of acquisition, or accuracy.
Traditionally digitization of an object for reverse engineering or inspection was depended on contact based measurement systems. For this kind of digitization user has to touch the part physically with any kind of CMM (coordinate measuring machine) like articulated arm, laser tracers, camera based optical system or fix cmm. The only problem with this kind of digitization is speed is very slow and quantities of points are very less. Data accusation is very slow because it requires mechanical movement of the machine and captures the every single point.
The advances in optical technology, coupled with high-speed computers and mature data acquisition and post-processing software, have made non-contact digitizers ideal for high-speed measurement applications. Most non-contact digitizing systems project some structured form of light on the object to be measured. Measurement is performed by analyzing the reflected light using a camera or by measuring time-of-flight. Non-contact systems can be classified into laser trackers, structured white light or laser scanners, or photogrametry based systems. Generally, non-contact systems acquire data rapidly when compared to contact based systems. They typically capture up to a million points per scan in less than a few minutes, depending on the type of system. Adequate number of data points is captured to provide almost continuous 3-D surface information for objects with complex geometries. The systems are designed to be portable, allowing for relatively free movement of the digitizer to a production environment, in contrast to moving the object to the digitizer as in the case of a CMM. The speed of data acquisition, portability, flexibility and accuracy of non-contact systems has made them a powerful tool in many applications. Software that processes these vast amounts of points (point cloud data) have improved tremendously providing tools to empower users in the areas of surface creation, rapid prototyping, quality and inspection, and GD&T.