Technology

FibroLaser uses the characteristics of glass fibre cables for a highly precise temperature sensor and fire localization system. The criteria that will ultimately sound an alarm can be individually defined – based on on-site conditions.

The principle – temperature sensoring with light reflection

The system components of FibroLaser are the control unit and the attached glass fibre sensor cable. The control unit sends a laser beam through the cable. The glass fibre reflects this light and scatters it back – split into “Stokes” and ”Anti-Stokes” signals (Raman Effect). While Stokes signals have nearly the same signal strength at all temperatures, this value rises proportionally to the temperature with Anti-Stokes signals. Thanks to semiconductor laser diodes, FibroLaser can measure these effects in glass fibres up to 10 km in length. By comparing Stokes and Anti-Stokes the control unit now reliably calculates the temperature and position of a heat source. Through optimization of temporal and local resolution, even slight temperature changes – such as an increase of a few degrees Celsius per minute – can be reliably and exactly displayed.

Highlights

  • Quick, reliable heat detection and fire localization by determining the light reflection

  • Partitioning the sensor cable in up to 1,000 zones

  • Individually configurable alarm parameter to adapt to on-site conditions