Modelling fluid flow and heat transfer tasks for testing PIR motion sensor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F21%3A43963714" target="_blank" >RIV/49777513:23640/21:43963714 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/matecconf/202134500017" target="_blank" >https://doi.org/10.1051/matecconf/202134500017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/matecconf/202134500017" target="_blank" >10.1051/matecconf/202134500017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling fluid flow and heat transfer tasks for testing PIR motion sensor

Popis výsledku v původním jazyce

The aim of this paper is to describe the methodology of modelling fluid flow and heat transfer tasks for testing electronic motion sensors, especially PIR (passive infra-red) motion sensors. The motion sensor measures changes in electromagnetic radiation in the infrared range caused by the movement of warmer objects compared to its surroundings. Distortion of the perception of the environment can lead to false alarms or insensitivity of the detector. PIR motion sensors should be designed and located to minimize heating of the lens by ambient air. The sensor may be exposed to conditions not specified in the basic standards. The practical part of this article deals with a non-standard test. A single-phase transient simulation in a specific test cabinet for two specific motion sensor models was performed using the computational fluid dynamics (CFD) method. The aim of these simulations was to evaluate the effect of hot flowing air on the lens and to compare the designs of both models. Comparison and analysis of the results showed that the test configuration does not guarantee a defined flow at the outlet of the pipeline, so a new configuration was designed.

Název v anglickém jazyce

Modelling fluid flow and heat transfer tasks for testing PIR motion sensor

Popis výsledku anglicky

The aim of this paper is to describe the methodology of modelling fluid flow and heat transfer tasks for testing electronic motion sensors, especially PIR (passive infra-red) motion sensors. The motion sensor measures changes in electromagnetic radiation in the infrared range caused by the movement of warmer objects compared to its surroundings. Distortion of the perception of the environment can lead to false alarms or insensitivity of the detector. PIR motion sensors should be designed and located to minimize heating of the lens by ambient air. The sensor may be exposed to conditions not specified in the basic standards. The practical part of this article deals with a non-standard test. A single-phase transient simulation in a specific test cabinet for two specific motion sensor models was performed using the computational fluid dynamics (CFD) method. The aim of these simulations was to evaluate the effect of hot flowing air on the lens and to compare the designs of both models. Comparison and analysis of the results showed that the test configuration does not guarantee a defined flow at the outlet of the pipeline, so a new configuration was designed.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

20th Conference on Power System Engineering

ISBN

—

ISSN

2261-236X

e-ISSN

—

Počet stran výsledku

10

Strana od-do

—

Název nakladatele

EDP Sciences

Místo vydání

Plzeň

Místo konání akce

Plzeň

Datum konání akce

7. 9. 2021

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000748890700017