Full-automatic spot welding electrode centering detection device and detection method thereof

The invention provides a full-automatic spot welding electrode centering detection device and a detection method thereof. In the detection device, a camera assembly is arranged opposite to a spot welding area of a test piece, a background lamp assembly is matched with the camera assembly, and the camera assembly and the background lamp assembly are respectively in signal connection with a controlsystem. The detection method comprises the following steps: collecting an image of a spot welding electrode through a camera assembly and sending the image to a control system; after processing and analysis of the control system, obtaining a space linear equation of the upper spot welding electrode axis and a space linear equation of the lower spot welding electrode axis, and finally obtaining thespace linear distance and the space linear included angle of the upper spot welding electrode axis and the lower spot welding electrode axis through calculation according to a space linear distance formula and a space linear