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Distributed Acoustic Sensing (DAS)

Specifications Overview

Optromix DAS solution turns a fiber optic cable into a distributed sensor capable of vibroacoustic and temperature monitoring.
  
Type of optical fiberG. 652 (9/125 SMF)
Maximum fiber length, kmup to 100
Spatial resolution, mdown to 10
Wavelength, nm1550
Scanning frequency, Hz500 - 1000
Dynamic range, dB30
ConnectorsLC/ APC
CPUIntel Core i5 or i7
RAM / HDD4 or 8 Gb / 2 Tb
ProtocolsTCP / IP, UDP
InterfaceEthernet, USB 2.0, DVI-D
Power supply110/220 V
Power consumption300 W
Dimensions482 x 415 x 140 mm (3U, 19")
Weight12 kg

Distributed Acoustic Sensing Solutions

Leakage detection and activity control

168 km underground pipeline of oil/gas-condensate field activity control.

Vibroacoustic monitoring of oil wells

Determination of the fluid’s inflow intervals; Finding the points of leakage of columns and packers; Determination of the hydraulic fracturing intervals.

Perimeter Security

1km 200m perimeter of a hotel and tourist complex. Two fiber optic cable lines: on fencing; in ground perimeter fencing.

DAS Control Activity Principle

  • A pulse is transmitted into the optic fiber and is scattered at refracted irregularities.
  • Backscattered signal is registered by the photodetector.
  • Due to light source high coherence length the backscattered signal becomes sensitive to vibration impact.
  • Variations in the backscattered signal caused by the environment's impact on the fiber are picked by the equipment. The signal without impact virtually does not change in time, while in the presence of impact it begins to oscillate.
  • By means of signal filtering through special algorithms it is possible to locate the section where the impact occurs, as well as classify the source of oscillations.

Full Range of Services​

  • Ground part installation, engineering and technical support
  • Commissioning, user training, real-time data transition;
  • ​Research programs, interpretation reports;
  • Layout design, system software modelling;