Determination of dynamic model parameters of smoke detectors

Jouni Björkman (Corresponding Author), Djebar Baroudi, Risto Latva, Maarit Tuomisaari, Matti Kokkala

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

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 stream 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. The characteristic length was found to vary in the range of 2 10 m indicating a smoke entry time constant in the range of 10 50 s at a flow rate of 0.2 m/s typical of smouldering fires. The response of photoelectric detectors was described by the model reasonably well. In the case of ionisation detectors, significant deviations were found. A method of using the model in fire safety engineering calculations is also presented.
Original languageEnglish
Pages (from-to)395-407
JournalFire Safety Journal
Volume37
Issue number4
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

smoke detectors
Smoke detectors
dynamic models
Dynamic models
smoke
Smoke
Fires
flow velocity
smoldering
Safety engineering
Detectors
Stream flow
detectors
free flow
dynamic response
entry
Flow velocity
time constant
Ionization
Dynamic response

Keywords

  • fire detection
  • fire detectors
  • fire detection systems
  • fire prevention
  • smoke
  • smoke detectors

Cite this

Björkman, J., Baroudi, D., Latva, R., Tuomisaari, M., & Kokkala, M. (2002). Determination of dynamic model parameters of smoke detectors. Fire Safety Journal, 37(4), 395-407. https://doi.org/10.1016/S0379-7112(01)00058-3
Björkman, Jouni ; Baroudi, Djebar ; Latva, Risto ; Tuomisaari, Maarit ; Kokkala, Matti. / Determination of dynamic model parameters of smoke detectors. In: Fire Safety Journal. 2002 ; Vol. 37, No. 4. pp. 395-407.
@article{b8e16486c620453eab5ee5bad88189bf,
title = "Determination of dynamic model parameters of smoke detectors",
abstract = "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 stream 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. The characteristic length was found to vary in the range of 2 10 m indicating a smoke entry time constant in the range of 10 50 s at a flow rate of 0.2 m/s typical of smouldering fires. The response of photoelectric detectors was described by the model reasonably well. In the case of ionisation detectors, significant deviations were found. A method of using the model in fire safety engineering calculations is also presented.",
keywords = "fire detection, fire detectors, fire detection systems, fire prevention, smoke, smoke detectors",
author = "Jouni Bj{\"o}rkman and Djebar Baroudi and Risto Latva and Maarit Tuomisaari and Matti Kokkala",
year = "2002",
doi = "10.1016/S0379-7112(01)00058-3",
language = "English",
volume = "37",
pages = "395--407",
journal = "Fire Safety Journal",
issn = "0379-7112",
publisher = "Elsevier",
number = "4",

}

Björkman, J, Baroudi, D, Latva, R, Tuomisaari, M & Kokkala, M 2002, 'Determination of dynamic model parameters of smoke detectors', Fire Safety Journal, vol. 37, no. 4, pp. 395-407. https://doi.org/10.1016/S0379-7112(01)00058-3

Determination of dynamic model parameters of smoke detectors. / Björkman, Jouni (Corresponding Author); Baroudi, Djebar; Latva, Risto; Tuomisaari, Maarit; Kokkala, Matti.

In: Fire Safety Journal, Vol. 37, No. 4, 2002, p. 395-407.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Determination of dynamic model parameters of smoke detectors

AU - Björkman, Jouni

AU - Baroudi, Djebar

AU - Latva, Risto

AU - Tuomisaari, Maarit

AU - Kokkala, Matti

PY - 2002

Y1 - 2002

N2 - 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 stream 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. The characteristic length was found to vary in the range of 2 10 m indicating a smoke entry time constant in the range of 10 50 s at a flow rate of 0.2 m/s typical of smouldering fires. The response of photoelectric detectors was described by the model reasonably well. In the case of ionisation detectors, significant deviations were found. A method of using the model in fire safety engineering calculations is also presented.

AB - 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 stream 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. The characteristic length was found to vary in the range of 2 10 m indicating a smoke entry time constant in the range of 10 50 s at a flow rate of 0.2 m/s typical of smouldering fires. The response of photoelectric detectors was described by the model reasonably well. In the case of ionisation detectors, significant deviations were found. A method of using the model in fire safety engineering calculations is also presented.

KW - fire detection

KW - fire detectors

KW - fire detection systems

KW - fire prevention

KW - smoke

KW - smoke detectors

U2 - 10.1016/S0379-7112(01)00058-3

DO - 10.1016/S0379-7112(01)00058-3

M3 - Article

VL - 37

SP - 395

EP - 407

JO - Fire Safety Journal

JF - Fire Safety Journal

SN - 0379-7112

IS - 4

ER -