Product Overview

The DAS-U1000 Distributed Acoustic Sensing Demodulation Card, independently developed by Shanghai Kunlian Technology, is a flagship DAS demodulation system specifically designed for extreme environmental monitoring and high-precision sensing applications. The system is configured with 4 channels of 1000 MSPS sampling rate, 16-bit ADCs and a single channel 2500 MSPS 14-bit DAC. It supports external reference clock input, achieving an exceptional balance between long distance, high dynamic range, and high spatial resolution to meet stringent engineering-grade monitoring requirements.
The core technological highlight of the DAS-U1000 lies in its systematic resolution of the inherent coupling constraints among spatial resolution, sensing range, and dynamic range—a first in distributed optical fiber sensing systems. Through a new-generation coherent noise modeling algorithm and a polarization state adaptive compensation mechanism, it effectively suppresses signal degradation caused by coherent fading and polarization randomness. This enables the system to maintain spatial resolution better than 1 meter and high signal-to-noise ratio detection capability even over tens of kilometers of transmission distance.

Core Technical Advantages

✅ Dual Noise Suppression Mechanism:
Integrated coherent fading and polarization fading suppression algorithms, significantly improving the accuracy of weak event signal identification.

✅ Breakthrough in Triple Constraint Limitations:
Enables relatively independent optimization of the three key parameters: spatial resolution, sensing range, and dynamic range.

✅ Advanced FPGA Algorithm:
Implements parallel signal processing and efficient analysis through embedded FPGA algorithms, greatly enhancing the identification efficiency and analytical capability for acoustic wave events.

✅ External Clock Synchronization Support:
Can interface with high-stability reference clocks, enhancing system stability and precision in multi-channel, long-distance cooperative monitoring scenarios.

✅ 4-Channel 1000MSPS High-Speed Sampling:
Supports large bandwidth and synchronous acquisition, capturing high-frequency vibration and transient acoustic signals to meet extreme environment monitoring demands.

✅ Spatial Resolution Better Than 0.5 Meters:
Utilizes a high-precision time-domain demodulation structure, supporting sub-meter acoustic vibration localization, particularly suitable for monitoring structural detail responses.

Application Fields

✅ Oil & Gas and Subsurface Pipeline Integrity Monitoring: Rapid identification of anomalies such as leaks, impacts, and third-party interference.

✅ Seismic and Geological Activity Detection: High-precision tracking of microseismic events and rock mass movements.

✅ Large-Scale Infrastructure Health Sensing: For detecting structural fatigue, cracks, and resonance in bridges, dams, high-speed rail tracks, etc.

✅ Underwater and Perimeter Security Monitoring: Suitable for intrusion detection and potential target identification in complex environments.

✅ Industrial Rotating Machinery Monitoring: Identifies abnormal vibrations to support predictive maintenance.