1. Project Overview
Project Name: Long-Span River-Crossing Bridge Structural Health Monitoring Project
Project Background: As a critical regional traffic hub, this long-span river-crossing bridge bears heavy daily vehicle traffic. After years of operation, the structure faces potential safety risks caused by tidal erosion, seasonal temperature differences, long-term vehicle loads, and structural aging. To achieve refined structural management, the management party launched a full-life-cycle structural health monitoring project, aiming to realize real-time tilt deformation collection, abnormal risk early warning, and data trend analysis for key bridge components.
The project requires high-stability, anti-interference wired transmission to adapt to concentrated on-site equipment and strong electromagnetic interference environments, avoiding data packet loss and signal instability caused by wireless signal shielding.
Core Monitoring Requirements
- Capture micro tilt and tiny settlement deformation of bridge piers, main beams and supports
- Stable operation in outdoor high humidity, temperature alternating and strong EMI environments
- Adopt RS485 wired transmission for stable and real-time data upload
- Support 24/7 continuous monitoring and graded safety early warning
2. Customized Monitoring Solution
2.1 Product Selection
The project adopts Drksir DK-INC Series High-Precision Dual-Axis Inclinometer Sensor with standard RS485 Modbus RTU wired output, which is specially designed for industrial long-term online monitoring scenarios.
| Item | Parameter |
|---|---|
| Product Model | DK-INC Dual-axis High-precision Inclinometer |
| Static Accuracy | ±0.005° |
| Resolution | 0.0007° |
| Transmission Mode | RS485 Wired Transmission (Modbus RTU) |
| Protection Grade | IP68 |
| Working Temperature | -40℃ ~ +85℃ |
| Anti-interference | Industrial EMC electromagnetic compatibility |
2.2 Deployment Scheme
According to the bridge structural stress characteristics and deformation law, a total of 16 inclinometer sensors are arranged at key monitoring points including pier tops, main beam mid-span, and support connection sections.
All sensors adopt RS485 bus networking mode, with on-site unified wiring and centralized data collection. The signals are transmitted stably to the on-site acquisition host, and finally synchronized to the cloud monitoring platform and BIM digital twin system to realize full-link structured data monitoring.
3. On-Site Implementation & Installation
The construction team adopted non-destructive installation with customized stainless steel fixed brackets, which does not damage the original bridge structure. All sensors were strictly level-calibrated before installation to ensure zero initial offset.
The RS485 wired bus layout features strong anti-shielding and anti-electromagnetic interference capabilities, completely adapting to the complex working conditions of on-site electrical equipment, frequency converters and power distribution cabinets. After wiring debugging and continuous aging testing, the system achieved stable data transmission with zero packet loss.
4. Project Operation Effect
- High-precision Micro-deformation Capture: The system accurately captures real-time tiny tilt changes of bridge structures, effectively identifying early structural deformation caused by tidal scouring, temperature stress and long-term load.
- Ultra-stable Wired Transmission: RS485 bus ensures long-distance, low-delay and zero-loss data transmission, solving the problem of unstable wireless signals caused by bridge shielding and complex electromagnetic environments.
- 24/7 Uninterrupted Monitoring: Real-time data synchronization, automatic data storage and trend curve analysis support engineers to grasp structural operation status dynamically.
- Safety Early Warning Mechanism: Set multi-level threshold early warning. Once the structural tilt exceeds the safe range, the system automatically pushes alarm information to avoid hidden structural safety dangers.
- Reduced Operation & Maintenance Costs: Realize intelligent monitoring instead of frequent manual inspection, greatly improving monitoring efficiency and reducing long-term operation and maintenance investment.
5. Customer Value
This bridge health monitoring project fully verifies the excellent performance of Drksir DK-INC series wired inclinometer sensors in infrastructure scenarios. The RS485 wired stable transmission + industrial-grade high precision + strong anti-interference solution perfectly matches the high-reliability monitoring needs of large bridges, providing accurate, continuous and effective basic data for bridge safety assessment, structural disease analysis and full-life-cycle operation and maintenance management.
6. Conclusion
For large bridge engineering scenarios with complex electromagnetic interference and high requirements for data stability, RS485 wired industrial inclinometer sensors are more reliable than wireless solutions. Drksir DK-INC series wired tilt sensors rely on mature industrial bus technology, ultra-low temperature drift algorithm and rugged industrial design to provide long-term stable structural health monitoring guarantee for global bridge infrastructure projects.
