GNSS Automatic Monitoring System Achieves Millimeter-Level Displacement Monitoring

The GNSS automatic monitoring system uses differential RTK technology to acquire millimeter-level displacement data, suitable for engineering scenarios such as dam safety monitoring, bridge health monitoring, and landslide early warning. This product features high precision and high stability, providing continuous and reliable deformation monitoring assurance for engineering structure safety through real-time data transmission and remote monitoring capabilities.

The GNSS automatic monitoring system is an automated deformation monitoring device based on the Global Navigation Satellite System. It is mainly used for real-time, high-precision safety monitoring of engineering structures such as high-rise buildings, reservoir dams, bridges, slopes, and tailings ponds, as well as crustal deformation. The system acquires three-dimensional coordinate data in real time through GNSS receivers deployed at monitoring points. The data is transmitted wirelessly to the monitoring center for analysis and processing. The GNSS automated deformation monitoring system solves the problems of low efficiency, long cycle time, low resolution, and high labor intensity of traditional methods, realizing the automation and intelligence of data acquisition, transmission, processing, analysis, and early warning, and can meet the deformation monitoring needs of different types, accuracies, and ranges.

The core advantage of the GNSS automatic monitoring system lies in its multi-system, multi-frequency signal reception capability, simultaneously compatible with satellite systems such as BeiDou, GPS, and GLONASS, achieving millimeter-level positioning accuracy through a real-time calculation platform. The system employs differential RTK technology, with the base station and monitoring station synchronously observing satellite signals. Common errors are eliminated through carrier phase differential analysis, achieving a horizontal accuracy of 1 to 3 millimeters and a vertical accuracy of 2 to 5 millimeters. In the parameter configuration of integrated GNSS displacement monitoring products, the static accuracy (differential mode) typically reaches ±(2.5mm + 1ppm) horizontally and ±(5mm + 1ppm) vertically. The receiver terminal remotely and wirelessly transmits the observation data to the monitoring center according to a predetermined acquisition and transmission frequency, where the monitoring center analyzes and processes the data in real time.

The GNSS automatic monitoring system can operate normally for extended periods in humid, dusty, hot, or frigid environments, significantly improving the continuity and reliability of monitoring and providing solid technical support for timely disaster early warning. In its practical application at the Jiudianxia Hydropower Station, this system leverages the high-precision displacement monitoring capabilities of BeiDou positioning technology to capture minute deformations in key areas such as landslides and slopes in real time. It has incorporated 22 GNSS monitoring points, covering geological hazard risk points such as landslides and collapses, achieving all-weather, high-precision dynamic monitoring.

The GNSS automatic monitoring system consists of four main parts: the space segment, hardware acquisition equipment, the data transmission system, and the cloud processing platform. Data is transmitted back to the cloud platform via communication modes such as 4G, wireless bridges, Wi-Fi, and Ethernet, allowing management personnel to remotely view displacement trends and early warning information. The system's supporting data processing platform incorporates various analytical models, enabling trend analysis, abrupt change detection, and spectral analysis of displacement time series to determine structural state changes. It has now developed into an automated GNSS online real-time deformation monitoring and analysis system, capable of achieving high-precision, all-weather, real-time monitoring of targets such as dams, ore bodies, and landslides.