Distributed Acoustic (DAS)
Introduction
Distributed acoustic sensor DAS is a distributed optical fiber sensor based on coherent Rayleigh scattering. It uses the fiber to sound (vibration) sensitive characteristics, when the external vibration acts on the sensing fiber, due to the elastic optical effect, the refractive index of the fiber, the length will have a small change, resulting in the optical intensity and phase of the transmission signal in the fiber change at the same time.
Technical parameter index
| Equipment parameters | DAS-UL10 (10) Lite | DAS-UL10 (20) Pro |
| Fiber Type | Single mode fiber 9um/125um | |
| Measuring channel | 1/2/4 channels | |
| Measuring distance | 10km/channel | 20km/channel |
| AI computility model | Standard | Upgraded |
| Sampling Space | 0.4m/1m/2m/5m (can be set) | |
| Position accuracy | 0.4m-25m (can be set) | |
| Alarm response time | ≤3s | |
| Phase adjustment accuracy | 0.1rad (Typical) | |
| Audio restore function | Yes | |
| Frequency accuracy | ±1HZ | |
| Communication interface | 2 RJ45 (Ethernet), 1 RS485, 2 USB, 8 relays, 3HDMI | |
| Optical connector | E2000 dustproof self-locking connector or FC/APC (standard with E2000) | |
| Operating power | DC24V, average module power consumption 25W | |
| Dimensions(W×D×H) and Weights | 482.6mm×328mm×132.8mm (13KG) | |
