Distributed Acoustic Sensing (DAS)

Specifications Overview

Optromix Distributed Acoustic Sensing (DAS) system allows the detection of ground vibrations at the distance of up to 100km along a fiber optic cable. It can provide vibroacoustic monitoring of the following events: Pipeline Leakages Detection, Third Party Intrusions (TPI) Monitoring, Railroads and Roads Infrastructure Monitoring.


Type of optical fiber	G. 652 (9/125 SMF)
Maximum fiber length, km	up to 100
Spatial resolution, m	down to 10
Wavelength, nm	1550
Scanning frequency, Hz	500 - 1000
Dynamic range, dB	30
Connectors	LC/ APC
CPU	Intel Core i5 or i7
RAM / HDD	4 or 8 Gb / 2 Tb
Protocols	TCP / IP, UDP
Interface	Ethernet, USB 2.0, DVI-D
Power supply	110/220 V
Power consumption	300 W
Dimensions	482 x 415 x 140 mm (3U, 19")
Weight	12 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.