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《Dam Observation and Geotechnical Tests》 2002-03
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DEVELOPMENT OF GPS MULTI-ANTENNA BASED DEFORMATION MONITORING SYSTEM

He Xiufeng 1, Hua Xisheng 1, Ding Xiaoli 2, Chen Yongqi 2, Sun Yongrong 2 (1. Hohai University, Nanjing 210098, China; 2. The Hong Kong Polytechnic University, Hongkong, China)  
This paper describes a GPS multi antenna system developed by the authors. GPS has already proven to be an efficient tool for monitoring the stability of high risk slopes. It offers greater accuracy than other surveying techniques do. However, GPS has its disadvantages when employed for slope monitoring. The major drawback is its high costs due to large scale GPS deployments at monitoring sites. The conventional GPS monitoring method, in which a permanent GPS receiver must be located at each point to be monitored, has significant limitations. A new approach that a single GPS receiver is linked with multiple antennas mounted at the monitoring points is employed to solve the problem in this paper. And a dedicated switching device is developed for this approach. Test results show that the positioning accuracy is 2 mm~3 mm.
【CateGory Index】: P228.4
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