title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð¿ÑÐ»Ð¸ Ð½Ð° ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð´ÑÐ¼Ð¾Ð²ÑÑ Ð¿Ð¾Ð¶Ð°ÑÐ½ÑÑ Ð¸Ð·Ð²ÐµÑÐ°ÑÐµÐ»ÐµÐ¹
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Study of the effect of dust on the functioning of smoke detectors
Creators: name: ÐÐ±ÑÑÐ¾Ð², Ð¡ÐµÑÐ³ÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: ÐÐ¾Ð¶Ð°ÑÐ½Ð°Ñ ÑÐ¸Ð³Ð½Ð°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ
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smoke channel
dust chamber
detector sensitivity and optical density of the medium
false alarm
smoke intake
reading grid
aerodynamic detector

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description: The topic of the final qualifying work "Study of the effect of dust on the functioning of smoke detectors". This work is devoted to the study of the design features of the smoke intake and their influence on the change in the sensitivity of the smoke fire detector when dust settles on the protective grid and inside the smoke chamber. The work was carried out on the basis of the Gefest Group of Companies in St. Petersburg. The main tasks that were solved within the framework of the study: study the reasons for false positives of PI based on statistical data; suggest ways to reduce dustiness in the smoke chamber; to propose methods that allow not to reduce the operational reliability of the device in real conditions. The paper presents detailed applied research on the dust fraction and the results of test tests of three models of detectors in a smoke channel with different degrees of dust. The hypothesis put forward about the preference of using a detector without a grid over a detector with a fine-mesh grid from the point of view of predicting its operation in dusty areas has a reasonable experimental confirmation. The proposed recommendations and conclusions are of practical value and can be taken as a basis when choosing a detector with a specific smoke intake design at real objects of their operation.