Satellite-guided Excavation - GPS-based systems can increase grading accuracy and reduce project costs

摘要

Grade control devices utilizing global positioning system (GPS) technology have been available for dozers and motor graders for more than a decade. Yet, they have only recently become available for hydraulic excavators. "The complex and variable movements of the excavator are the reason for its popularity, and the reason for the lag in a positioning solution," says Randy Noland, machine control product manager for Topcon Positioning Systems. Several manufacturers now offer GPS-based systems that have converted excavators into fine-grading tools. According to Leica Geosystems, the technology has developed to a level where excavators can supply grading accuracies down to .10 ft. (1.25 in.).