Details

Autor(en) / Beteiligte

• 王伟 吴功平 白玉成 肖华 杨智勇 严宇 何缘 徐显金 苏帆

Titel

Hand-eye-vision based control for an inspection robot’s autonomous line grasping

Ist Teil von

• Journal of Central South University, 2014-06, Vol.21 (6), p.2216-2227

Ort / Verlag

Heidelberg: Central South University

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In order to ensure that the off-line arm of a two-arm-wheel combined inspection robot can reliably grasp the line in case of autonomous obstacle crossing, a control method is proposed for line grasping based on hand-eye visual servo. On the basis of the transmission line＇s geometrical characteristics and the camera＇s imaging principle, a line recognition and extraction method based on structure constraint is designed. The line＇s intercept and inclination are defined in an imaging space to represent the robot＇s change of pose and a law governing the pose decoupling servo control is developed. Under the integrated consideration of the influence of light intensity and background change, noise （from the camera itself and electromagnetic field） as well as the robot＇s kinetic inertia on the robot＇s imaging quality in the course of motion and the grasping control precision, a servo controller for grasping the line of the robot＇s off-line arm is designed with the method of fuzzy control. An experiment is conducted on a 1：1 simulation line using an inspection robot and the robot is put into on-line operation on a real overhead transmission line, where the robot can grasp the line within 18 s in the case of autonomous obstacle-crossing. The robot＇s autonomous line-grasping function is realized without manual intervention and the robot can grasp the line in a precise, reliable and efficient manner, thus the need of actual operation can be satisfied.