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concentration and rapid wear and damage to, and therefore the need for them to strengthen to strengthen the process must first surface data, which requires the free surface and the ridge structure in the study how to effectively digitize mold below the free surface, for example briefly explain the principle of adaptive measurement. complex edge line structure of the island structure of free-form surface mold surface characteristics of shape classification in the free-form surface measurement using two-dimensional adaptive measurement is based on surface characteristics. Stargazers can use green ray green laser pointer  to point at the stars at night.
Adaptively generate a probe point and the corresponding obstacle avoidance point, in order to achieve a reasonable layout of measurement points, to improve measurement efficiency and accuracy of its basic idea is: the use of a cross-section curve of the free surface has been measured four points Pi -3 and Pi-2 and Pi-1, Pi and the Bessel method fitting curve by adjusting the fitting curve parameters adaptively with extrapolation to obtain the next detection point and the obstacle avoidance point, the next measurement point coordinates Pi, +1, Pi-2 and Pi-1 and Pi and Pi +1 as the control point fitting curve, from adaptation to obtain the new point of detection and obstacle avoidance point, and so on to the end of the measurement. Schematic adaptive measurement in two-dimensional adaptive measurement on the basis of the further development of the three-dimensional adaptive measurement, and laid a solid basis for measuring efficiency. green laser pointer  can show the pictures on the projection screen.
First generated based on the measurement parameters of the BB surface, but on the surface directly through the change control parameter values [5] of equidistant trajectory is difficult to generate suitable for processing. We used an indirect method of generation surface called the triangle of the triangular grid triangular mesh surface, each triangular area is very small, so the triangular mesh surface approximation in triangular BB surface for a reference trajectory L, the first in the Triangle The grid surface generates an L distance curve, find the center of gravity coordinates of the points on the curve in the corresponding triangular domain, which can calculate the value of the corresponding triangular BB surface chip and outside the normal direction. green laser pointer  can be used in an occasion like medical teaching. green laser pointer  is wrapped with environment-friendly copper.