Application of BDS/GPS Fusion Relative Positioning in Slope Deformation Monitoring

Given the difficulties faced in real-time monitoring of slope deformation and the low degree of automation of the traditional monitoring methods, a BDS/GPS based geological deformation monitoring system was designed. This system uses carrier phase differential technology to achieve BDS/GPS high-precision positioning, transmits data through the NB-IoT wireless network, and transmits slope deformation monitoring data and environmental-based data to a cloud server, achieving automatic and real-time data collection and transmission. In order to study the function and accuracy of the BDS / GPS integrated system in deformation monitoring, experiments are designed to test the stability of the system and collected environmental factors. The feasibility of BDS / GPS in deformation monitoring is analyzed from the constellation distribution and satellite system. The test results show that long-term continuous observation is the prerequisite for obtaining high-precision positioning data. Under the same conditions, the BDS / GPS integrated system's measured accuracy is better than that of the BDS single system.