GPS-based system and method for rectifying deviation of gantry crane automatically

Abstract

The invention provides a GPS-based system and method for rectifying the deviation of a gantry crane automatically. The system is used for the gantry crane and comprises a processor, a controller, a GPS (Global Positioning System)) receiving plate and at least two GPS antennas; each GPS antenna is fixedly arranged on the main beam of the gantry crane; the signal output end of each GPS antenna is connected with the signal output end of the GPS receiving plate; the signal output end of the GPS receiving plate is connected with the signal input end of the processor; and the signal output end of the processor is connected with the signal input end of the controller. The system can not be affected by the friction, aging and other factors of the mechanical components, thereby having the advantage of long service life. In addition, the system has the advantages of no cumulative error and high measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of gantry crane control, and in particular relates to a GPS-based gantry crane automatic deviation correction system and method. Background technique [0002] Gantry cranes, especially long-span rail-mounted gantry cranes, are widely used in shipyards, docks, steel mills and other industrial sites, with a maximum load of 1,600 tons and a maximum span of more than 200 meters. Common gantry crane structure usually consists of traveling wheel set, gantry frame, lifting trolley, spreader, power system and control system and other parts. Among them, the gantry frame is the bearing mechanism of the entire gantry crane and the basis for the installation of other components. The gantry is composed of a main beam arranged horizontally and rigid outriggers and flexible outriggers respectively installed at both ends of the main beam; traveling wheel sets are respectively installed at the bottom ends of the rigid outri...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned automatic deviation correction systems are all based on mechanical deflection measurement, which requires high installation accuracy, so they have the defects of complicated installation and high cost, and are greatly affected by mechanical wear and aging, thereby reducing the service life

Moreover, for the encoder method, since the deflection is indirectly measured by measuring the rotational speed and stroke, there is a cumulative error, which reduces the measurement accuracy

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