Метрологія, кваліметрія та кваліметричні вимірювання: теорія і практика
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Date
2015
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Видавництво Львівської політехніки
Abstract
Розглянуто й проаналізовані основні проблеми розвитку кваліметрії. Обґрунтовано використання в теорії та
практиці кваліметрії концептуального поняття “кваліметричні вимірювання” як одного із видів вимірювань,
що дозволяє поєднати методологію кваліметрії та метрології, істотно розширити можливості кваліметрії
щодо достовірності й точності отриманих оцінок якості продукції. Розглянуто і проаналізовано основні
завдання кваліметрії з оцінювання якості вуглеводневих газів. Рассмотрены и проанализированы основные проблемы развития квалиметрии. Обосновано использование в
теории и практике квалиметрии концептуального понятия “квалиметрические измерения” как одного из видов
измерений, что позволяет совместить методологию квалиметрии и метрологии и существенно расширить
возможности квалиметрии в достоверности иточности полученных оценок качества продукции. Рассмотрены
и проанализированы основные задачи квалиметрии в области оценивания качества углеводородных газов. In the article, the main issues of interrelation between qualimetry and metrology reviewed and analyzed. Qualimetry is a
branch of science where research subject is product quality quantitative assessment and as an each new science it has
some theoretical and methodological problems. Solving these problems, according to the authors, is possible only in a
complex combination of quality control methodology and metrology. Metrology, the science of measurement and its
application, has the strong scientific, practical and legal tools, which allows research in any field of knowledge. Analysis
of the ways of solving these problems is the subject of this study.
The authors propose to use the concept of “qualimetrical measurements” as one of the types of measurements in the
theory and practice of quality control. That allows combine the methodology of qualimetry and metrology and
significantly extend qualimetry opportunities in the reliability and accuracy of the product quality estimates.
Qualimetrical measurements, by the authors definition, is indirect measurements of product quality level, the meaning
of which can be obtained by the way of measurement results processing of its characteristics according to
multidimensional scaling methodology. Product quality level is a relative characteristic of product quality grounding on
the comparison of values of products quality assessed indexes and basic values of corresponding indexes.
Generally, qualimetrical measurements as any other one consists of two principal stages:
• carrying out the measuring experiment during which different characteristics (mechanical, dimensional, electric,
magnetic, thermic and chemical composition etc.) of studied products are measured;
• measuring experiment results processing during which the studied products quality Q is defined. This is the
qualimetrical measurements results. Therefore, the mentioned above approach of qualimetrical measurements essence and purpose enables to treat them as
one of the indirect measurements types and to use the main principles of measuring theory for their analysis.
The procedure of qualimetrical measurements for measuring of product quality level is developed and its practical
implementation described in this article and such tasks of research to achieve the work goal solved:
• a synthesis of the product quality measure;
• developing of the procedure of qualimetrical measurements;
• a synthesis of the one-dimensional qualimetrical scale of product quality level;
• a practical implementation of the qualimetrical measurements methodology on the example of the determining the
quality level of natural gas as an energy source.
The basis of any measurement is the comparison ofmeasured value and measure which reproduce and (or) keeps one ormore
known values of a given quantity. Qualimetrical measurements specificity is absence of specific physical (material) quality
measures of some products. Product quality virtual measure used formethodological providing of qualimetricalmeasurements
procedure realization and their accuracy and quality assessment. Virtualmeasure is the theoretical analog of corresponding
physical (material)measure of studied product and it’s the reflection of real physical (material) measure of current product
quality is expressed by mathematical and programmeans. In this case, the product quality virtualmeasure is a weighted basic
profile of product qualityPK,bz , formed from single relative weighted basic quality indexes Kbz,i , і = 1,2,…,п, where
n – number of product quality indexes, equal to the number of properties of the investigated product. To measure the quality level of the investigated product Q, namely for full implementation of qualimetric measurements
procedures, it is necessary to compare the weighted estimated profile of product quality PK,oz , formed from single relative
weighted estimated quality indexes Koz,i , with weighted basic profile PK ,bz , namely with virtual quality measure. To
compare profiles of quality PK,oz and PK,bz is used the methodology ofmultidimensional scaling – one of the sections of
mathematical statistics, the subject of research of which is data processing on pairwise similarities, connections and
relationship between objects that are analyzed in order to present these objects in the form of points of some multidimensional
space. In the case of statistic independent (non-correlated) single relative quality indexes for comparision profiles of quality
PK,oz and PK,bz it should be used weighed Euclidean individual differences model. In the case of correlation between the
single quality indexes to determine product quality level it should be used three-model multidimensional scalingmodel.
In both cases it should be defined the absolute difference or deviation function DП between profiles of quality PK,oz and
PK,bz . On the basis of obtained deviations DП the scale of product quality level Q determination can be build, and as result
bigger numerical quality Q level value will correspond for higher product quality: Q = 1 –DП or Q = (1 –DП)×100%.
Thus, based on the methodology of qualimetrical measurements, developed in the article, the complex evaluation of the Natural
Gas quality as an energy source was realized, in which were taking into account a ratio of themost important gas characteristics,
such as caloric content, humidity, density, composition, availability and quantity of non-flammable and harmful components.
Description
Keywords
квалиметрия, метрология, квалиметрические измерения, уровень качества продукции, профиль качества продукции, виртуальная мера качества продукции, многомерное шкалирование, кваліметрія, метрологія, кваліметричні вимірювання, рівень якості продукції, профіль якості, продукції, віртуальна міра якості продукції, багатовимірне шкалювання, qualimetry, metrology, qualimetrical measurements, product quality level, product quality profile, virtual product quality measure, multidimensional scaling
Citation
Мотало В. Метрологія, кваліметрія та кваліметричні вимірювання: теорія і практика / Василь Мотало, Андрій Мотало, Богдан Стадник // Вимірювальна техніка та метрологія : міжвідомчий науково-технічний збірник / відповідальний редактор Б. І. Стадник. – Львів : Видавництво Національного університету "Львівська політехніка", 2015. – Випуск 76. – С. 5–21. – Бібліографія: 28 назв.