- Tytuł:
- Increase of noise immunity of laser smoke fire detectors
- Autorzy:
-
Kitsak, A.
Esipovich, D.
Poliakov, V. - Powiązania:
- https://bibliotekanauki.pl/articles/136356.pdf
- Data publikacji:
- 2011
- Wydawca:
- Szkoła Główna Służby Pożarniczej
- Tematy:
-
noise immunity
laser radiation
external interference
differential scheme of smoke particles registration - Opis:
- The article describes of the optical system of the proposed smoke detector construction, in which lightening of a smoke chamber is made by a focused laser beam having, according to the periodic law, a modulated spatial distribution of radiation intensity in the focal spot. This structure of the light field in the smoke flow allows to generate the algorithm of signals selection produced by the smoke particles with characteristic sizes and velocities. The result is increased stability of the smoke detector under the influence of external noise such as dust, vapor with different sizes of smoke particles and/or velocities. There are carried out model experiments on registration of time signals that are generated by particles of different sizes, crossing the plane of the beam focusing. The spectral characteristics of the recorded signals are researched. There are identificated possible algorithms for selection of signals generated by micro formations with specified medium size and speed of movement.
- Źródło:
-
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2011, 42; 123-126
0239-5223 - Pojawia się w:
- Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
- Dostawca treści:
- Biblioteka Nauki
Artykuł