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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">izvestswsu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Юго-Западного государственного университета</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Southwest State University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-1560</issn><issn pub-type="epub">2686-6757</issn><publisher><publisher-name>ЮЗГУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21869/2223-1560-2021-25-1-110-121</article-id><article-id custom-type="elpub" pub-id-type="custom">izvestswsu-870</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>Информатика, вычислительная техника и управление</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Computer science, computer engineering and IT managment</subject></subj-group></article-categories><title-group><article-title>Метод измерения влажности пиломатериала, реализуемый на ПЛК</article-title><trans-title-group xml:lang="en"><trans-title>PLC-based lumber humidity measurement method</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1953-2747</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нгуен</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nguyen</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нгуен Ван Выонг, аспирант</p><p>пр. Ленина 30, Томск 634050</p></bio><bio xml:lang="en"><p>Vinh V. Nguyen, Post-Graduate Student</p><p>30 Lenin Ave., Tomsk 634050</p></bio><email xlink:type="simple">vuongoicolen@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4761-7249</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шилин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shilin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шилин Александр Анатольевич, доктор технических наук</p><p>пр. Ленина 30, Томск 634050</p></bio><bio xml:lang="en"><p>AleksandrA. Shilin, Dr. of Sci. (Engineering)</p><p>30 Lenin Ave., Tomsk 634050</p></bio><email xlink:type="simple">shiiln@tpu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2781-718X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Момот</surname><given-names>П. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Momot</surname><given-names>P. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Момот Павел Михайлович, студент</p><p>пр. Ленина 30, Томск 634050</p></bio><bio xml:lang="en"><p>Pavel M. Momot, Student</p><p>30 Lenin Ave., Tomsk 634050</p></bio><email xlink:type="simple">vjvjngfif@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Томский политехнический университет</institution></aff><aff xml:lang="en"><institution>Tomsk Polytechnic University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>30</day><month>05</month><year>2021</year></pub-date><volume>25</volume><issue>1</issue><fpage>110</fpage><lpage>121</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нгуен В.В., Шилин А.А., Момот П.М., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Нгуен В.В., Шилин А.А., Момот П.М.</copyright-holder><copyright-holder xml:lang="en">Nguyen V.V., Shilin A.A., Momot P.M.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://izvestswsu.elpub.ru/jour/article/view/870">https://izvestswsu.elpub.ru/jour/article/view/870</self-uri><abstract><sec><title>Цель исследования</title><p>Цель исследования. Решение научно-практической проблемы измерения влажности пиломатериала на базе программируемого логического контроллера (ПЛК), позволяющее реализовывать системы управления сушкой пиломатериалов на недорогих контроллерах широкого применения с преимуществами современных SCADA систем.</p></sec><sec><title>Методы</title><p>Методы. Для достижения поставленной цели исследованы современные методы оценки влажности пиломатериала по электрическому сопротивлению. Приведён обзор и анализ известных зависимостей электрического сопротивления пиломатериала от влажности. Отмечена необходимость измерения сопротивления в диапазоне 2,5 Ком до 25 Мом. Описано схематическое решение согласования с ПЛК моста измерения высокоомного сопротивления с дополнительным источником напряжения. Предложена методика расчёта схемы согласования. Получены выражения для вычисления влажности по данным аналого-цифрового преобразователя. Приведена процедура настройки канала измерения по показаниям двух эталонных измерений.</p></sec><sec><title>Результаты</title><p>Результаты. Выполнена оценка погрешности измерения влажности и сопротивления. Показано, что погрешность измерения сопротивления до 20 % приводит к погрешности измерения влажности до 1 %, при условии корректной настройки параметров. Для настройки достаточно выполнить два эталонных измерения, чтобы выполнить процедуру настройки параметров измерения влажности.</p></sec><sec><title>Заключение</title><p>Заключение. В процессе проектирования современных систем сушки пиломатериалов можно воспользоваться доступными и хорошо представленными в литературе алгоритмами и программами технологического процесса для реализации на ПЛК. В статье предложено необходимое для указанных алгоритмов и программ решение основной проблемы измерения влажности пиломатериала. Материал может быть полезен для исследования технологических этапов процесса сушки и разработки промышленных систем управления на базе недорогих контроллеров.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Purpose or research</title><p>Purpose or research. The paper considers the solution of the scientific and practical problem of measuring the humidity content of lumber on the basis of a programmable logic controller (PLC), which makes it possible to implement control systems for drying lumber on inexpensive controllers of wide application with the advantages of modern SCADA systems.</p></sec><sec><title>Methods</title><p>Methods. To achieve this goal, modern methods for assessing the humidity content of lumber by electrical resistance have been investigated. We have provided a review and analysis of the known dependences of the electrical resistance of lumber on moisture. It is noted the need to measure resistance in the range of 2.5 KΩ to 25 MΩ. The schematic solution for matching a high-resistance measurement bridge with an additional voltage source with a PLC is described here. We have proposed a method for calculating the matching scheme. Expressions are obtained for calculating humidity according to the data of an analog-to-digital converter. The procedure for setting up the measurement channel according to the readings of two reference measurements is presented.</p></sec><sec><title>Results</title><p>Results. The estimation of the measurement error of humidity and resistance is carried out. It is shown that a resistance measurement error of up to 20% leads to a humidity measurement error of up to 1%, provided that the parameters are correctly configured. To set it up, it is enough to take two reference measurements to complete the procedure for setting the humidity measurement parameters.</p></sec><sec><title>Conclusion</title><p>Conclusion. In the process of designing modern systems for drying lumber, you can use the algorithms and programs of the technological process available and well presented in the literature for implementation on the PLC. The article offers a solution to the main problem of measuring the humidity content of lumber, which is necessary for these algorithms and programs. The material can be useful for researching technological stages of the drying process and developing industrial control systems based on inexpensive controllers.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>программируемые логические контроллеры</kwd><kwd>ПЛК</kwd><kwd>влажность древесины</kwd><kwd>линеаризация</kwd><kwd>электрическое сопротивление древесины</kwd><kwd>системы управления камерой осушения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>programmable logic controllers</kwd><kwd>PLC</kwd><kwd>wood humidity content</kwd><kwd>linearization</kwd><kwd>electrical resistance of wood</kwd><kwd>drying chamber control systems</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">Хандожко В. А., Матлахов В. П., Копыткин С. М. 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