The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Welding is developing to automatization and robotization, and robot welding is an important development direction. A robot real-time seam tracking system based on laser vision is researched, which includes laser vision sensing and seam image acquisition, seam images recognition and extraction, system coordinates calibration and transformation, communication between PC and robot, control for robot...
The X-ray CT scanner and the MRI system have been widely used for 3D reconstruction. Since the large size and expensive price of such devices, they are usually found in large hospitals. In many hospitals a X-ray/fluoroscopy system is necessary and cheaper. Consider the cost, labor, and radiation exposure, the 3D reconstruction of a bone or other interested 3D object from 2D X-ray images have its meaning...
Signal patterns of high speed rotational arc sensor in gas metal arc welding (GMAW) have been studied. For V-groove butt joint, a geometry model of the weld bead profile and torch rotating has been developed. Welding current waveforms of both simulations and experiments have been analyzed. The welding current waveforms simulated based on the mathematical model are consistent with those captured in...
Signal patterns of high speed rotational arc sensor in gas metal arc welding (GMAW) have been studied. For V-groove butt joint, a geometry model of the weld bead profile and torch rotating has been developed. Welding current waveforms of both simulations and experiments have been analyzed. The welding current waveforms simulated based on the mathematical model are consistent with those captured in...
Camera calibration and robot hand-eye calibration are important parts in applications of robots with visions. A way to simultaneously carry out camera calibration and robot hand-eye calibration is presented in robot welding system with laser vision. It is based on a certain relation between hand-eye matrix and matrix of robot hand frame to robot base frame. Calibration experiments are performed in...
The representations for the weighted Moore-Penrose inverse, the Drazin inverse, and the group inverse of the Kronecker product A B of the two matrices A and B are given, and by using these results, the determinant forms for projectors AA +MN ,A +MN A, A d A, and A g A are deduced.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.