AC104 4A dam monitoring

AC-104 Vibrating Wire Data Logger for Hydropower Dam Monitoring (Full English Translation)
The AC-104 series vibrating wire data logger serves as the **core data acquisition terminal** ensuring the long-term safety and stable operation of hydropower dams. It converts signals from vibrating wire sensors embedded at critical dam locations into standard Modbus data, enabling 24/7, high-precision monitoring** of dam structural conditions.

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Core Functions in Hydropower Dam Engineering
1. Dam Deformation & Stress Monitoring
- Application: Dam concrete sections, abutments, foundations, spillways and other key positions.
- Working principle: Connects with vibrating wire strain gauges, stress meters and displacement meters to collect real-time data on structural stress, micro-displacement and deformation.
- Value: Precisely captures stress and deformation caused by water pressure, temperature changes and concrete creep; provides early warning of structural anomalies to prevent cracking and excessive displacement.

2. Seepage & Uplift Pressure Monitoring
- Application: Dam foundation cutoff curtains, anti-seepage layers and drainage holes.
- Working principle: Works with vibrating wire piezometers and uplift pressure meters to collect seepage pressure data.
- Value: Monitors dam leakage in real time, verifies the effectiveness of anti-seepage systems, prevents seepage failure, and provides key data for dam slope stability evaluation.

3. Temperature Field Monitoring (Dam Temperature Control & Crack Prevention)
- Application: Mass concrete blocks, upstream/downstream dam surfaces and internal temperature control zones.
- Working principle: Synchronously collects temperature data to eliminate temperature drift and forms an internal temperature distribution profile.
- Value: Helps engineers grasp temperature patterns, guide temperature control measures, and prevent concrete cracking caused by large internal-external temperature differences during construction and operation.

4. Abutment & Slope Stability Monitoring
- Application: Dam abutments, bank slopes and reservoir banks near the dam.
- Working principle: Connects with vibrating wire anchor cable load cells, bolt stress meters and joint meters to monitor rock stress, crack opening and slope displacement.
- Value: Evaluates slope and abutment stability, detects early signs of rock loosening and crack propagation, and avoids landslides and collapses.

5. Gate & Metal Structure Monitoring
- Application: Spillway gates, penstocks, spiral cases and other metal components.
- Working principle: Collects data from vibrating wire sensors mounted on gates and pipes to monitor stress, vibration and deformation.
- Value: Tracks structural loading and fatigue damage, supporting maintenance, inspection and safe operation of metal structures.

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Why AC-104 Is Ideal for Hydropower Sites
- Multi-channel acquisition: Supports 1–4 channels simultaneously, reduces wiring cost and fits distributed dam monitoring.
- Dual-mode excitation: High-voltage mode for high-precision short-term testing; low-voltage mode for long-term, unattended operation, covering the full dam lifecycle.
- IP65 protection & wide temperature range: Waterproof, dustproof and weather-resistant, ensuring stable performance in harsh, humid and high-temperature-difference environments.
- Modbus RTU output: Seamlessly connects to hydropower LCU, SCADA and remote monitoring platforms for real-time data transmission and centralized management.

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