A study on the comparison of positioning tolerances depending on the state of vision sensors

Recent manufacturing industry has become automation. By using robot for human´s work, production cost has decreased and productivity has increased. The latest robot uses vision system which means complicated work and automated tasks are available. But lens distortion of vision sensor causes an error. The bigger errors in automatic assembly process will be produce defective product. And these errors cause a lower productivity. There are a lot of robots that use vision sensor. Most of the robots that use vision sensor are consist of only one sensor. If robot uses a one vision sensor, under the influence of the sensor´s location and illumination, moving objects from the conveyor belt is exactly the point is hard to find. This study compares the two cases. One is using only one vision sensor and the other is using two vision sensors that are consist of fixed vision sensor and moving vision sensor.