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当可燃物燃烧时 ,产生的火焰通常具有一定的闪烁频率 ,并且每种可燃物都具有个自固定的闪烁频率 ,这种频率在火灾的危险度评估和火灾的监控中具有重要的研究价值。为了测量这些可燃物的火焰的闪烁频率 ,我们设计了数据采集系统 ,用多种可燃材料进行了大量的实验 ,研究了算法。经过处理和分析 ,得出了火焰闪烁频率分布在 3- 2 5 Hz之间 ,主要频率在 7- 12 Hz范围内 ,并且火焰闪烁频率与火焰大小和距红外接收器件的距离无关。基于以上结论 ,可以认为将火焰的闪烁频率作为判断火灾是否发生的判据是完全可以的
Flames generated when the combustible material is burned usually have a flickering frequency and a self-fixating flicker frequency for each combustible material, which is of great research value in fire risk assessment and fire monitoring. In order to measure the flickering frequency of these flammable materials, we designed a data acquisition system that performed a large number of experiments with a variety of combustible materials and studied the algorithms. After processing and analysis, it is concluded that the flame flashing frequency is distributed between 3-5 Hz and the main frequency is in the range of 7-12 Hz, and the flame flashing frequency is independent of the flame size and the distance from the infrared receiving device. Based on the above conclusion, it can be considered that it is completely possible to judge the flicker frequency of flames as a criterion for determining whether a fire has occurred