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Anamaria Hariton, Cristian Zet, Cristian Foşalău
Automatic Method of Assessment and Grading of Students in a Measurement Laboratory

High activity levels in measurement laboratories can often exceed the time allocated for individual laboratory sessions. These laboratories involve a wide range of measurement tasks—from simple to complex—while students operate under strict time constraints. Consequently, the manual evaluation of student performance by instructors becomes labor-intensive and time-consuming. The digitization of the assessment process offers an effective solution. This paper presents a method that integrates LabVIEW with an SQL database to automatically record, verify, and grade student performance in laboratory sessions. The proposed method includes automated data saving for each student, validation of measurement accuracy, and objective grading mechanisms. Various tools are employed for real-time data acquisition, verification, and automatic evaluation of student activities.

Cristian Zet, Gabriel Constantin Dumitriu, Foșalău Cristian
Checking Traceability by Analyzing DCC Blockchain Transactions

Traceability is essential in metrology, linking measurement results to primary standards through documented calibration chains. While blockchain ensures secure, immutable storage of Digital Calibration Certificates (DCCs), retrieving traceability paths remains complex. This paper proposes a method to reconstruct calibration traceability by analyzing blockchain transactions recorded in a private, permissioned network. We describe an architecture combining PHP-based asset management, LabVIEW DCC generation, and recursive graph analysis to extract calibration dependencies. Realistic scenarios illustrate the approach, demonstrating improved auditability, reduced reliance on physical certificates, and secure, decentralized traceability management that aligns with modern digital metrology requirements.

Dong-Hun Ryu, Chae-Wook Lim
Development and Application Study of a Calibration Certificate Anomaly Detection System

This study focuses on the development of a system to effectively extract and utilize data from approximately 3,000 types of unstructured calibration certificates (e.g., paper, PDFs) widely used in the calibration industry. To process document-based data that are difficult for machines to recognize, the Korea Testing Laboratory (KTL) has developed a calibration certificate anomaly detection system called K-Argos, which applies object detection AI technology based on Convolutional Neural Networks (CNNs). The core function of the system is to extract data from unstructured documents, convert them into structured data, and standardize and store the results. Using the converted structured data, K-Argos provides statistical data management features such as performance analysis of calibrated equipment and anomaly detection in calibration data. Additionally, the system can be used to correct inaccurate identification information (e.g., manufacturer, model, serial number) and to analyze errors within the calibration data. In the future, the K-Argos system will be expanded to include an online technical supervisor service that automatically determines anomalies in data during the certificate approval stage and provides relevant information to the approver (technical supervisor). This is expected to significantly improve the efficiency and reliability of calibration tasks and contribute to the digital transformation of the calibration industry through the implementation of Digital Calibration Certificates (DCCs).

Jan Loewe, Justin Jagieniak, Shanna Schönhals
dcclib – Consolidation of Digital Calibration Certificate (DCC) tools into a unified Python library

The increasing adoption of Digital Calibration Certificates (DCCs) has led to the development of different tools and libraries, each addressing different aspects and needs of DCC creation and processing workflows. These tools and libraries differ in their functionality, interfaces and programming languages used, resulting in a fragmented landscape with an inconsistent user and developer experience. This work presents dcclib, a library that provides a standardized interface for basic DCC functionality by consolidating the functionalities from existing tools and libraries into a single, easy-to-use, and modular Python library. dcclib is designed to be extensible and can be used as the basis for more advanced DCC tools and libraries. Its functionality is accessible through an interface that can be used in Python scripts, a command line interface (CLI) and a REST API.

Tuukka Mustapää
Transition to DCC-based calibration management: findings from proof-of-concept investigations

The introduction of standardized data formats for measurement and calibration data such as the digital calibration certificate (DCC) will enable further automation of calibration-related processes. This will open new possibilities for optimization of calibration processes in industrial applications. This paper describes some of the challenges and possibilities related to the transition to DCC-based calibration processes and management in the process industry. The findings presented are based on case examples and proof-of-concept projects from the process industry, in which automation of a calibration process is pursued using a combination of systems from multiple providers. The investigations and findings also suggest that parts of the DCC data structure could potentially be beneficial also for other applications, in which exchanging of calibration data is needed, but system integration is otherwise challenging due to lack of a suitable harmonized data structure.

Serhii Kursin, Oleh Velychko, Ihor Pototskyi, Andrii Bachynskyi
Automated Calibration System with Digital Calibration Certificates Support

This paper presents the development of an automated system for the calibration of radio-frequency (RF) power meters, addressing the need for accurate, traceable, and efficient calibration in the RF domain. The system is based on a Rohde & Schwarz signal generator and reference power sensors, operating over a frequency range up to 43.5 GHz. A Python-based software solution enables full automation of the calibration process, including signal level auto-balancing and uncertainty estimation. Calibration results – such as calibration coefficients, linearity, and Voltage Standing Wave Ratio (VSWR) – are formatted into Digital Calibration Certificates (DCCs) using XML. DCCs offer a reliable, machine-readable solution for integration into Industry 4.0 systems, enhancing traceability and reducing human error. The proposed approach improves calibration efficiency and supports the global shift toward digital metrology. A user interface and example XML structure are also presented.

Emrecan Keskin, Beste Korutlu
Towards Seamless Digitalisation in TUBITAK UME Mass Laboratory

We present automatic generation of Digital Calibration Certificate for a set of weights calibrated using a Robotic Mass Comparator operating in the mass range from 1 mg to 10 g. The tool features a Graphical User Interface that streamlines the processing of Digital Calibration Certificate from the automatically extracted and organized data in the calibration reports and the most recent calibration certificates of the reference standards and test weights adhering to relevant international recommendations, standards and guidelines. This user-friendly and highly automated software application represents a substantial advancement in the mass subfield of modern metrology in terms of handling large volumes of calibration data with minimal intervention.

Julian Haller, Gisa Foyer
Interoperability of DCCs for weights and weighing instruments through standardization

This paper presents various efforts undertaken to standardize DCCs for weights and weighing instruments (balances) that aim to ensure interoperability between DCCs from different issuers. It is shown that, in addition to conventions regarding the structuring of information, "mini-taxonomies" and clear, unambiguous definitions for the identifiers of certain information are essential. Finally, it will be shown how "interoperability challenges" can be used to check the interoperability between DCCs from different issuers on the one hand and the unambiguity and clarity of the conventions on the other.

Li Li, Zheng Yang, Jia Ziqing
Structural Connection Parameter Measurement for Precision Motion Systems Using Accelerometers: A Preliminary Study

Accurate modelling is important for both the performance control and monitoring of high-precision motion systems in advanced manufacturing machines. It is not difficult to build dynamic models for motion systems based on the multi-rigid-body system assumption. However, it is usually not feasible to acquire the real connection parameters between rigid bodies like stiffness and damping coefficients especially after mechanical assembly which can be significantly different from their designed values. In this paper, a measurement scheme using multiple accelerometers is presented with discussion of the data processing methods. Simulation results on a three-rigid-body motion system and experimental results on a two-mass motion system preliminarily verify the scheme. Finally, existing problems are put forward for further study.

Ankica Milinković, Sanja Tucikešić
Calibration of storage tanks in the oil and gas sector based on the concept of digital metrology and big data analytics - Part II

Part II of this study presents the practical implementation and evaluation of the digital paradigm for storage tank calibration in the oil and gas sector, as conceptually and methodologically established in Part I. This section demonstrates the practical application of digital methods for calibration, including 3D laser scanning, the analysis and description of the final results obtained through the processing of collected measurements, the establishment of the metrological traceability chain, and a brief overview of key measurement uncertainty components. The findings indicate the potential for a shift from reactive to predictive calibration strategies, in alignment with Industry 4.0 principles and contemporary requirements for interoperability and digital metrology.

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