Fire parameters sample comparison

The pattern comparison of fire parameters is a measure for recognizing an alarm condition in a fire detector . In general, for this purpose, patterns in signals that are supplied by sensors for fire parameters are compared with patterns that are typical for fires.

As fire characteristics, inter alia, can measured values for the smoke density and the temperature and concentrations of combustion gases such as carbon monoxide and carbon dioxide are used.

A pattern comparison of fire parameters is used in fire detectors primarily to reduce false alarms . Certain patterns can either be used as an indication of a fire or as an exclusion criterion. No fire parameter pattern comparison is simply exceeding an alarm threshold by the measured value of a single fire parameter.

Examples of patterns that suggest a fire

a certain rise in temperature when a minimum temperature is exceeded at the same time
Simultaneous increase in carbon monoxide concentration and smoke density.
Temperature rise with simultaneous occurrence of smoke with a given smoke density
A strong light signal that changes with the flicker frequency typical of flames

Examples of patterns that do not suggest a fire

A very slow increase in a smoke density signal that lasts for months
Sudden high signals of short duration
Falling temperatures

Possibilities for carrying out a fire parameter sample comparison

Use of logically linked comparators and filters ,
Using IF ... THEN ... rules in an algorithm
Comparison of recognized patterns with those that are stored in a database .
Use of statistical classification methods B. with the Bayesian classifier

Web links

Customized solutions in fire alarm systems (accessed on February 28, 2020)
Clever solutions in technical fire protection (accessed on February 28, 2020)
What is important when planning (accessed February 28, 2020)
Fire protection guide for refugee accommodation (accessed on February 28, 2020)
REQUIREMENTS FOR FIRE DETECTION SYSTEMS (accessed on February 28, 2020)