The invention relates to a
correction system and method mainly used for a large-span
gantry crane and particularly relates to an automatic
correction system and method for traveling of a
gantry crane. The automatic
correction system comprises an
encoder group, a programmable controller, a traveling motor for driving traveling mechanisms of rigid legs and flexible legs of the
gantry crane and a frequency converter for controlling the traveling motor, wherein the
encoder group is connected with the programmable controller, and the frequency converter is connected with the traveling motor. Therefore, the automatic correction
system has the advantages that (1) the
automation degree is high, and automatic correction can be realized without need of artificial intervention; (2) the error correction accuracy is high, the deviation degree can be accurately detected by utilizing the
encoder group, the traveling motor is driven by the frequency converter to carry out accurate adjustment, simultaneously, the slipping phenomenon of the low-speed ends of traveling wheel groups can be found in time, and corresponding adjustment can be made; and (3) the application scope is wide, the deformation of a traveling track of a
cart and the whole deflection of the
cart can be judged and error operation can be prevented.