Bending Angle Detection Device, Linear Extraction Device Used in It, and Bending Angle Detection Position Setting Device

摘要

In detecting the bend angle, the linear projection image formed on the surface of the workpiece is imaged by the imaging means, and the inclination angle and position on the image of the known specimen are known from the inclination angle and position of the linear projection image on the image. Refer to the data on the actual tilt angle to calculate the angle of the workpiece.;In the representative straight line extraction, a representative pixel is obtained from a luminance value distribution of pixels in a predetermined axial direction, and a representative straight line is obtained from a plurality of representative pixels.;Further, in extracting the required straight line from the image having unnecessary straight lines, the image pickup means is arranged so that the lower die is taken out, and the second straight line is extracted from the bottom of the screen. Moreover, in setting the detection position of a bending angle, the bending process which can detect the bending angle of a workpiece | work is calculated from the simulation information regarding a bending state for each bending process of a workpiece | work.