CCD video camera triggering control circuit for visual welding seam tracking system

The utility model discloses a CCD video camera triggering control circuit for a visual welding seam tracking system, which is mainly composed of a II type low-pass filtering circuit, an optoelectronic isolating circuit, a voltage comparing circuit, an amplitude limiting circuit and a monostable trigger circuit. In a welding process, weak arc light and small splash interference in droplet short circuit are realized. At this period, CCD video camera exposure is trigger, and a smooth and clear welding seam image can be acquired. The CCD video camera triggering control circuit is used for controlling CCD video camera exposure, and exposure time can be accurately set to the shortcircuit transition period and furthermore the exposure time is well controlled, thereby improving image identification validity of the visual welding seam tracking system.