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Though the surveying robot (i.e. automatic electronic total station) can automatically (or semi-automatically) monitor the exterior deformation of the dam, the stability of the station location (monitor base station) has great impact on the monitor precision and when the measurement vision is covered, the surveying robot fails to monitor the corresponding deformation point. In order to tackle the above problem, the author and the research team have integrated the technology of GPS (global positioning system) and surveying robot and developed the GPSR-AMS-DS(GPS-based surveying robot automatic monitoring system for dam safety), which completely solves the foresaid problem, simplifies the monitor program and reduces the fixed investment cost of monitor. The article introduces the structure and working principle of the GPS-based surveying robot automatic monitoring system for dam safety, presents examples of monitor.