Distributed Acoustic Sensing Instrument DAS-22-80KM
OVERVIEW
Overview
DAS-22-80KM is a portable distributed acoustic sensing instrument with up to 110 km single-channel range, 3–26 m spatial resolution, 0.01 Hz–100 kHz frequency response, 5.8 kg weight and 33–55 W power consumption, supporting polarization, spatial and frequency diversity reception with coherent-fading suppression.
CORE STRENGTHS
Core strengths
- 01
Accurate positioning
- 02
Compact
- 03
Low power
- 04
Long range
Key specifications
| Parameter | Value |
|---|---|
| Model | DAS-22-80KM |
| Dimensions | 220 × 120 × 311 mm |
| Weight | 5.8 kg |
| Maximum range | 110 km |
| Power consumption | 33–55 W |
| Channels | 1 / 2 / 4 selectable |
| Spatial resolution | 3–26 m |
| Frequency response | 0.01 Hz–100 kHz |
| AOM | 80 M / 200 M supported |
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| Parameter | Value |
|---|---|
| Frequency sweep range | ±30 |
| Vibration dynamic range | ±500 rad |
| Fading suppression | Polarization, spatial and frequency diversity with coherent-fading suppression |
| FPGA acquisition module | Xilinx Zynq7-100 (highest Zynq configuration) |
| On-board DDR | 4 GB |
| Narrow-linewidth laser | Linewidth 3–5 kHz; wavelength 1549.50–1550.50 nm; power 20 mW |
| Optical amplifier | EDFA peak 0–200 mW; Raman amplifier (optional) 0–500 mW |
| Balanced detector | CMRR 30–45 dB; saturation 120 uW @1550 nm; NEP 8.5 pW/√Hz |
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