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Distributed Sensing DTS and DTSS Technology

Distributed sensing takes advantage of the fact that scattering characteristics of laser light traveling down an optical fiber vary with temperature and strain along its length. By using an optical fibre as a sensor, distributed sensing makes it possible to take real-time readings of temperatures and strain every meter, or less, along the fibre which can be up to 30 km long.

As schematically shown below, Raman back-scattering is used for distributed temperature sensing (DTS), while Brillouin waves are used for distributed temperature and strain sensing (DTSS).

Advantages of DTS and DTSS

Some of advantages of DTS (distributed temperature sensing) and DTSS (distributed temperature & strain sensing) are:

  • Fully distributed data greatly increase information and reduces uncertainty

  • Sensor is made from standard optical fibre - cost effective

  • Immune to shock/vibration and electromagnetic interference

  • No electronics or moving parts in monitoring zones

  • Inherently high reliability (sensor design life of 25 years +)

  • High temperature performance 700°C

  • Extremely small for access into space restricted areas (e.g. ducts, oil wells, pipes ...)

Benefits of DTS and DTSS

With distributed fibre based technology we are able to deploy up to 15,000 measurement points with a single channel instrument (this increases to 200,000 through the use of a multiplexer). The cable itself is the sensor which provides the following benefits:

  • Low cost per sensor

    The sensor is made from standard telecoms fibre, which means costs per sensor can be less than $3 per measurement point.

  • Low installation costs

    Measurements are provided along the entire length of the cable, meaning less planning is required with regards to planning the location of each sensor.

  • Low maintenance costs

    Fibre optics have no moving parts and cables typically have 25 year design lives, resulting that once the cable is installed, there are very low maintenance costs.


Applications


Oil and Gas Monitoring

Monitor flow of production well, injection in water injection well, motors and sand screen integrity

Fire Detection How it works

Real-time monitor and precisely detect location of a fire in buildings, tunnels and other high-risk locations

Subsea Flowline Flow Assurance

Achieve real flow assurance - react to real problems instead of theoretical prediction

Structural Monitoring

Real-time monitor all parts of a structure for early detection of overloading or failure

Process Monitoring

Optimise production and reduce chemical injection by understanding platform process in detail

Umbilical Monitoring

Monitor overheating in coiled umbilicals, know strain in umbilical and avoid breakages

Dam Safety

Monitor temperature and strain to evaluate integrity of dam structure

Building Temperature Control

Monitor and optimise temperature of all parts of building and hence energy use

Power Line Integrity

Optimise current loading of power cables, detect hotspots and monitor cable sag

Pipeline Integrity

Detect leaks and blockages quickly



Download FOSTA brochure: Distributed Temperature Sensing (DTS)

FOSTA Pte Ltd  |  FOSTA (Malaysia) Sdn Bhd
215 Kaki Bukit Avenue 1 Shun Li Industrial Park, SINGAPORE 416042
Tel: +65 6744 2661   Fax: +65 6561 3766   info@fos-ta.com

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