Welded joints geometry testing by means of automated structured light scanning

German Filippov, Dmitry Sednev, Yana Salchak

Research output: Contribution to journalArticlepeer-review


Nuclear industry in Russia plays an important role in total power generation. At the same time, it is considered to be dangerous in terms of high potential risk in a case of any failure occurrence. Therefore, constant monitoring and quality control is essential on every stage of energy production process, as well as maintenance of the technical quality of the exploited components. For that reason, specified regulatory documents are developed. They provide quality requirements for each component type and regulate inspection procedures. In this paper, welded joints were considered as the controlled object. It is represented that standard quality control methods based on the manual visual inspection are not accurate enough. Therefore, this paper suggests an advanced method of automated optical scanning for misalignment evaluation of welded parts based on structural light technique. Precision improvement was achieved by implementation of a robotic manipulator, which led to the development of the specific calibration technique. Considering that there are no established methodologies for such method the validation experiments were performed. The ability to detect the minimum displacement in accordance with nuclear industry regulatory documents was studied. The results demonstrated that misalignment of 0.47 mm can be measured, and it proves that proposed method can be further implemented for a practical application in nuclear industry.

Original languageEnglish
Pages (from-to)53-60
Number of pages8
JournalEastern-European Journal of Enterprise Technologies
Issue number5-95
Publication statusPublished - 2018


  • 3D-reconstruction
  • 3D-реконструкцiя
  • Industrial robot calibration
  • Structured light
  • Visual testing
  • Welding misalignment
  • Вiзуальний контроль
  • Змi- щення кромок зварних з'єднань
  • Калiбрування промислового робота
  • Структурне свiтло

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering
  • Management of Technology and Innovation
  • Electrical and Electronic Engineering
  • Applied Mathematics

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