Determination of dynamic model parameters of smoke detectors

摘要

A simple model for the dynamic response of point-type smoke detectors is described. The model is based on two independent parameters: the characteristic length and the static response threshold. Experimentally determined values of the parameters for six commonly used point-type smoke detectors are reported. In the tests the free streams flow velocity was varied in the range of 0.2-0.8 m/s and the rate of rise of smoke density in the range of 0.1- 2 dB/ms. The model parameters were determined from the experimental data by using the least squares fitting with regularisation.