| 摘要 |
This application discloses an Angle Measurement System (AMS) for continuously measuring the angle of a metal sheet that is being bent by a bending machine to a required angle. AMS is composed of two modules (or heads) each containing a light source (laser, LED, etc.), an image sensor, a processing unit and a communication unit. One, two or more modules of the system are mounted above or below the sheet and a geometric pattern is projected by each light source on the sheet. This system automatically performs computations and adjustments and sends the resulting angle to the bending machine for control. The angle measurement method benefits from the following design features of the modules to optimize the speed of the computation: Random pixel access of image sensor is used to rapidly locate the projected pattern and then work only with pattern neighborhood. Immediate processing of the visual information allows to avoid transmission and storage elsewhere.
|
