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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.2021-7-32-41</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1923</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>ГОСУДАРСТВЕННЫЕ ЭТАЛОНЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>STATE STANDARDS</subject></subj-group></article-categories><title-group><article-title>Современные тенденции конструирования модулей национальных эталонов единиц объёмного расхода (объёма) жидкости в диапазоне 10–5–103 мл/мин</article-title><trans-title-group xml:lang="en"><trans-title>Modern trends in the design of modules of national standards for units of volume fluid flow rate (volume) in the range from 10–5–103 ml/min</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>Тухватуллин</surname><given-names>Р. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Tukhvatullin</surname><given-names>R. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рустам Рашидович Тухватуллин</p><p>г. Казань, Республика Татарстан</p></bio><bio xml:lang="en"><p>Rustam Rashidovich Tukhvatullin</p><p>Kazan, Republic of Tatarstan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6706-0679</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щелчков</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shchelchkov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Валентинович Щелчков</p><p>г. Казань, Республика Татарстан</p></bio><bio xml:lang="en"><p>Alexey Valentinovich Shchelchkov</p><p>Kazan, Republic of Tatarstan</p></bio><email xlink:type="simple">avschelchkov@kai.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Всероссийский научно-исследовательский институт расходометрии – филиал ФГУП «Всероссийский научноисследовательский институт метрологии им. Д. И. Менделеева»</institution><country>Russian Federation</country></aff><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт расходометрии – филиал ФГУП «Всероссийский научноисследовательский институт метрологии им. Д. И. Менделеева»;&#13;
Казанский национальный исследовательский технический университет им. А. Н. Туполева – КАИ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>VNIIR – Affiliated Branch of D. I. Mendeleyev Institute for Metrology;&#13;
Kazan National Research Technical University named after A. N. Tupolev – KAI</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>08</day><month>08</month><year>2023</year></pub-date><volume>0</volume><issue>7</issue><fpage>32</fpage><lpage>41</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/1923">https://www.izmt.ru/jour/article/view/1923</self-uri><abstract><p>В контексте потребностей ведущих отраслей мировой экономики рассмотрено современное состояние метрологического обеспечения измерений единиц массы и объёма жидкости в потоке, массового и объёмного расходов жидкости в диапазоне микрорасходов 10–5–103 мл/мин. По результатам аналитического обзора представлены основные метрологические и режимные характеристики национальных эталонов. Определены основные принципы генерации потока жидкости в национальных гравиметрических и волюметрических эталонах при измерениях массы и объёма жидкости методом динамического взвешивания. Рассмотрены конструктивные решения и принципы действия ключевых модулей национальных эталонов. Определены способы подачи жидкости в накопительную ёмкость и конструкции накопительных ёмкостей с учётом минимизации эффекта испарения жидкости, влияния капиллярной силы и плавучести. Рассмотрены основные источники неопределённости измерений массы и объёма жидкости методом динамического взвешивания и способы минимизации этих неопределённостей. Предложена модифицированная модель динамического измерения массового расхода жидкости, учитывающая основные источники неопределённости. Представлена сравнительная оценка влияния источников неопределённости на метрологические характеристики национальных эталонов.</p></abstract><trans-abstract xml:lang="en"><p>In the context of the needs of the leading sectors of the world economy, the current state of metrological support for measuring units of mass and volume of a liquid in a flow, mass and volume flow rates of a liquid in the range of micro-flow rates of 10–5–103 ml/min is considered. Based on the results of the analytical review, the main metrological and operating characteristics of national standards are presented. The basic principles of generating a fluid flow in national gravimetric and volumetric standards when measuring the mass and volume of a fluid by the dynamic weighing method have been determined. Constructive solutions and principles of operation of key modules of national standards are considered. Methods for filling a liquid into a storage tank and designs of storage tanks are determined, taking into account the minimization of the effect of liquid evaporation, the influence of capillary force and buoyancy. The main sources of uncertainty in measuring the mass and volume of a liquid by the dynamic weighing method and methods for minimizing these uncertainties are considered. A modified model of dynamic measurement of liquid mass flow rate is proposed, taking into account the main sources of uncertainty. A comparative assessment of the influence of sources of uncertainty on the metrological characteristics of national standards is presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>капиллярные силы</kwd><kwd>испарение жидкости</kwd><kwd>дегазация</kwd><kwd>временной дрейф</kwd><kwd>плавучесть</kwd><kwd>стабильность расхода</kwd></kwd-group><kwd-group xml:lang="en"><kwd>capillary forces</kwd><kwd>liquid evaporation</kwd><kwd>degassing</kwd><kwd>time drift</kwd><kwd>buoyancy</kwd><kwd>flow stability</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">Lucas P., Ahrens M., Geršl J., Sparreboom W., Lötters J., Biomedizinische Technik, 2015, vol. 60, pp. 317–335. https://doi.org/10.1515/bmt-2014-0132</mixed-citation><mixed-citation xml:lang="en">Lucas P., Ahrens M., Geršl J., Sparreboom W., Lötters J., Biomedizinische Technik, 2015, vol. 60, pp. 317–335. https://doi.org/10.1515/bmt-2014-0132</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Corleto C., Claudel P., Dobre M., Del Campo D., Filtz J.-R., Measurement Science and Technology, 2018, vol. 29, no. 7, 070101. https://doi.org/10.1088/1361-6501/aabb6d</mixed-citation><mixed-citation xml:lang="en">Corleto C., Claudel P., Dobre M., Del Campo D., Filtz J.-R., Measurement Science and Technology, 2018, vol. 29, no. 7, pp. 070101. https://doi.org/10.1088/1361-6501/aabb6d</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">David C., Claudel P., MAPAN Journal of Metrology Society of India, 2011, vol. 26, pp. 203–209. https://doi.org/10.1007/s12647-011-0019-0</mixed-citation><mixed-citation xml:lang="en">David C., Claudel P., MAPAN Journal of Metrology Society of India, 2011, vol. 26, pp. 203–209. https://doi.org/10.1007/s12647-011-0019-0</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Кремлевский П. 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