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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2020-4-14-19</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1773</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОПТИКО-ФИЗИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>OPTICOPHYSICAL MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Достоверность результатов измерений загрязнения воздуха твёрдыми частицами методом детектирования рассеянного лазерного излучения</article-title><trans-title-group xml:lang="en"><trans-title>Reliability of the results of measurements of air pollution by solid particles by the method of detection of scattered laser radiation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Марисельвам</surname><given-names>А. K.</given-names></name><name name-style="western" xml:lang="en"><surname>Mariselvam</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ченнаи</p></bio><bio xml:lang="en"><p>Chenna</p></bio><email xlink:type="simple">mariselvamak@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Падманабхан</surname><given-names>K.</given-names></name><name name-style="western" xml:lang="en"><surname>Padmanabhan</surname><given-names>K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ченнаи</p></bio><bio xml:lang="en"><p>Chenna</p></bio><email xlink:type="simple">ck_padmanabhan@rediffmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шиванесан</surname><given-names>С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sivanesan</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ченнаи</p><p> </p></bio><bio xml:lang="en"><p>Chenna</p></bio><email xlink:type="simple">sivanesh1963@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Технологический колледж Алагаппы; Университет Анны</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Alagappa College of Technology; Anna Universit</institution><country>India</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>28</day><month>06</month><year>2023</year></pub-date><volume>0</volume><issue>4</issue><fpage>14</fpage><lpage>19</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1773">https://www.izmt.ru/jour/article/view/1773</self-uri><abstract><p>Проблема измерения параметров частиц пыли в окружающей среде в настоящее время актуальна для жителей густонаселённых городов. Измерения размера и функции распределения по размерам частиц пыли осуществляются с помощью приборов, работа которых основана на методе рассеяния лазерного излучения. Выполнен анализ метода измерения, базирующегося на сферической модели частиц и теории дифракции Ми. Показана возможность ошибочной индикации результатов измерений широко применяемыми портативными измерительными приборами параметров пыли. Для вычисления индикатрисы рассеяния лазерного излучения на частицах размером 2–10 мкм разработана специальная программа в среде MATLAB. В результате решения системы линейных неоднородных алгебраических уравнений оценена функция распределения частиц по размерам при условии измерения интенсивности рассеянного лазерного излучения не менее чем при двух фиксированных углах рассеяния. Для экспериментальной оценки указанной функции распределения использованы четыре простых фотоприёмника при разных фиксированных углах рассеяния.</p></abstract><trans-abstract xml:lang="en"><p>The problem of measuring the parameters of dust particles in the environment is currently relevant for residents of densely populated cities. Measurements of the size and size distribution function of dust particles are carried out using instruments based on the method of scattering of laser radiation. The analysis of the measurement method based on the spherical particle model and the theory of Mie diffraction is performed. The possibility of erroneous indication of measurement results by widely used portable measuring instruments of dust parameters is shown. To calculate the scattering luminous flux by particles with a size of 2–10 μm in laser radiation, a special program was developed in the Matlab medium. As a result of solving a system of linear non-homogeneous algebraic equations, the particle size distribution function is to be estimated under the condition that the intensity of the scattered laser radiation is measured by at least two fixed scattering angles. For the experimental estimation of this distribution function, four simple photodetectors were used for different fixed scattering angles.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>концентрация частиц</kwd><kwd>загрязнение воздуха</kwd><kwd>частицы РM2</kwd><kwd>5 (particulate matter) размером менее 2</kwd><kwd>5 мкм</kwd><kwd>теория рассеяния Ми</kwd><kwd>распределение частиц по размерам.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>particle concentration</kwd><kwd>air pollution</kwd><kwd>particulate matter PM2</kwd><kwd>5 (particles up to 2</kwd><kwd>5 μm in size)</kwd><kwd>Mie scattering theory</kwd><kwd>particle size distribution.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Loomis D., Huang W., and Chen G., Chinese Journal of Cancer, 2014, vol. 33, nо. 4, pp. 189–196. DOI: 10.5732/cjc.014.10028</mixed-citation><mixed-citation xml:lang="en">. 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