Many modes for multi-sensor fire detectors

摘要

The final decade of the twentieth century saw many significant changes in the theory and practice of active fire protection. One of the most interesting changes was the growing acceptance of detectors that use more than one type of technology to detect fire. These detectors are generally known as multi-sensor detectors. They incorporate two or more sensors of different types - ionisation smoke, optical smoke, heat, CO - and process the signals to produce one output on which the decision fireo fire is based. The majority of multi-sensor detectors have microprocessors in the detector head to carry out this processing.