Calibration

Reliable measurement of electric energy is of great importance both in industry and for household consumers of both single-phase and three-phase networks. Interlaboratory comparisons (ILCs) are one of the experimental forms of confirming the scope of accreditation of calibration laboratories (CLs). The article is devoted to the analysis of the results of the ILC of a three-phase electric energy meter, which was conducted in 2025. The ILC was conducted with the participation of accredited CLs from Ukraine and Israel.

A critically important segment of the electrical industry is the supply of electricity using high-voltage technologies. The metrological reliability of voltage, current and electrical energy measuring devices is confirmed by timely verification of compliance of measurement errors with the requirements of standards. In export-import operations with electricity, recognition of measurement and testing results at the international level comes to the fore.

Interlaboratory comparisons (ILC) are used to evaluate and confirm measurements' accuracy, reliability, and reproducibility. ILCs are conducted for both testing and calibration laboratories (CL). They are comparing the results of measurements or calibrations obtained by different laboratories. The main stages of confirming the competence of laboratories include accreditation as the first step of such confirmation, as well as periodic participation in the ILCs.

Robotization is one of the crucial directions of modernizing today's industrial production. Robotic systems offer solutions to many different challenges. However, their implementation is constrained by limited accuracy, which is inferior to conventional machine tools. A way to improve industrial robots' accuracy is to calibrate them, i.e., eliminate factors that affect accuracy by refining the mathematical models for software correction of manufacturing and assembly errors, as well as elastic and thermal deformations.

The paper examines the characteristics of accuracy when transferring the size of a unit of length from a standard to an industrial measuring device. Based on the processing of the calibration results, the peculiarities of using different transfer schemes within the limits of the current regulatory document were considered. The problems that arise are studied. To ensure an effective scheme of transfer and unity of measurements, the expediency of application of the method of RMS deviations in the analysis of the obtained measurement results is shown.

The article forms and substantiates the application of control charts for the method of extending the service life of the source of ionizing radiation (SIR). An algorithm for its aim was developed. The main types of con- trol charts and the features of their application were considered. A methodology for constructing a cusum map for extending the service life of SIRs based on the results of their calibrations, as well as a methodology for checking the results of SIR calibration for statistical controllability, were developed.

Наведено технологію побудови шкали розпізнавальної складності зображень об’єктів уваги, які локалізують на зображеннях-тестах. Технологія ґрунтується на перетвореннях Фур’є, є експериментально підтверджена і може використовуватися для тестового контролю систем розпізнавання візуальної інформації.

The creation and operation of mobile communication systems is impossible without determining the parameters of base stations and mobile communication systems. For these purposes, appropriate devices are used that optimally combine testing capabilities in a single portable solution, which eliminates the need for several separate control and measuring devices. One of the main types of measurements of such devices is the measurement of the power of ultra-high and extremely high frequency signals.

Measurement of time intervals with low accuracy on intervals from a few seconds to several hours or days is relevant for some broad applications in various fields of activity. Such measurements are widely used in the technological processes of various enterprises during the preparation and quality control of the preparation of medicines, during the maintenance of technical equipment and mechanisms, chemical technological processes, etc.