利用单频实时动态定位技术监测小金县春厂坝滑坡

为解决相对定位算法中载波相位模糊度难以被固定的问题,提出一种单历元阻尼LAMBDA算法,从而实现全球卫星导航系统(GNSS)实时动态定位技术。基于BDS/GPS单频实时动态定位核心算法,研发一套北斗智慧云变形监测系统。重点介绍了单历元阻尼LAMBDA算法的实现过程和变形监测系统的工作流程,该系统具有硬件成本低、实时高精度位移监测等功能特点,适用于滑坡预警工作。变形监测系统应用于小金县春厂坝滑坡监测,在连续监测过程中,该系统于2018年2月26日成功预警了滑坡事件。本次滑坡事件没有造成人员和重大经济损伤,监测预警保障了当地居民的生命财产安全。

Monitoring the Chunchang Dam Landslide Using BDS/GPS Single Epoch RTK Technology

In order to solve the problem that carrier phase ambiguity is difficult to be fixed in relative positioning algorithm, a single epoch damped LAMBDA algorithm is proposed to realize GNSS real-time dynamic positioning technology. Based on the core algorithm of BDS/GNSS single frequency RTK, a Beidou intelligent cloud deformation monitoring system is developed. This paper focuses on the implementation of single epoch damped LAMBDA algorithm and the workflow of deformation monitoring system. The system has the characteristics of low hardware cost, real-time and high-precision displacement monitoring, and is suitable for landslide early warning. Deformation monitoring system is applied to the monitoring of Chunchang dam landslide in Xiaojin county. The landslide has a large amount of earthwork and a wide range. Once it collapses, it will cause heavy casualties and economic losses. In the continuous monitoring process, the system successfully warned landslide events on February 26, 2018. The landslide did not cause any serious economic damage to people. Monitoring and early warning ensured the safety of life and property of local residents.