Selection of the sampling interval in determining the dynamic characteristics of thermal fire detectors
DOI:
https://doi.org/10.33408/2519-237X.2019.3-1.53Keywords:
fire detectors, dynamic characteristics, sampling interval, errorAbstract
Purpose. A method for determining the frequency characteristics of thermal fire detectors, which is based on the use of time characteristics, is considered.
Methods. The transition function is approximated by local Heaviside functions, which allows, using the integral Laplace transforms, to go to approximate expressions for the transfer function of the heat fire detector.
Findings. The recommendations for determining the sampling interval in determining the frequency characteristics of heat fire detectors class A1 are given. The basis of these recommendations is the use of permissible values of the approximation error of these frequency characteristics.
Application field of research. The values obtained can be used to test thermal fire detectors by determining their frequency characteristics. Сonclusions. The permissible sampling intervals in determining the frequency characteristics of thermal fire detectors class A1 have been determined. It is shown that the choice of the sampling interval in determining the frequency characteristics of thermal fire detectors depends largely on the magnitude of their time constants.
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Abramov YU.O., Kal’chenko YA.YU., Sobina V.O. Sposіb viznachennya dinamіchnikh kharakteristik teplovikh pozhezhnikh spovіshchuvachіv [Method for determining the dynamic characteristics of thermal fire detectors]: patent UA No. 111447. Published November 10, 2016. (ukr)
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Copyright (c) 2019 Abramov Yu.A., Kal'chenko Ya.Yu.
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