Product Overview

The DAS-U1000 Distributed Optical Fiber Acoustic Demodulation Card, independently developed by Shanghai Kunlian Technology, is a flagship DAS demodulation system designed for extreme environment monitoring and high-precision sensing applications. The system is configured with a 4-channel 1000 MSPS 16-bit ADC and a single-channel 2500 MSPS 14-bit DAC, supporting external reference clock input. It achieves an excellent balance between long distance, high dynamic range, and high spatial resolution, meeting demanding engineering-grade monitoring requirements.
The core technological highlight of the DAS-U1000 is that it systematically resolves the coupled constraints among spatial resolution, detection distance, and dynamic range for the first time in distributed optical fiber sensing systems. Through a new generation of coherent noise modeling algorithms and an adaptive polarization state compensation mechanism, it effectively suppresses signal degradation caused by coherent fading and polarization randomness, enabling the maintenance of a spatial resolution better than 1 meter and high signal-to-noise ratio detection capability even over transmission distances of tens of kilometers.

Core Technical Advantages

✅ Dual Noise Suppression Mechanism:
Integrates coherent fading and polarization fading suppression algorithms, significantly improving the accuracy of identifying weak event signals.

✅ Breaking the Triple Limitation Bottleneck:
Enables relatively independent tuning of the three parameters: spatial resolution, detection distance, and dynamic range.

✅ Advanced FPGA Algorithms:
Utilizes embedded FPGA algorithms to achieve parallel signal processing and efficient parsing, greatly enhancing the identification efficiency and analysis capability of acoustic events.

✅ External Clock Synchronization Support:
Can connect to high-stability reference clocks, enhancing system stability and accuracy in multi-channel, long-distance collaborative monitoring scenarios.

✅ 4-Channel 1000MSPS High-Speed Sampling:
Supports large bandwidth, synchronous acquisition to capture high-frequency vibrations and transient acoustic signals, meeting the needs of extreme environment monitoring.

✅ 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 & Underground Pipeline Integrity Monitoring: Quickly identifies anomalies such as leaks, impacts, and third-party interference.

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

✅ Large-scale Infrastructure Health Sensing: Used for detecting fatigue, cracks, and resonance in structures like bridges, dams, and high-speed rail tracks.

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

✅ Industrial Rotating Machinery Monitoring: Identifies abnormal vibrations, supporting predictive maintenance.