ETU “LETI” Developed an Ultrasonic Testing Installation for Industrial Products Quality Control

ETU “LETI” Developed an Ultrasonic Testing Installation for Industrial Products Quality Control

The system allows an automated high-precision diagnostics of defects and damages of various components of industrial equipment.

12.05.2024 63

To assess the quality of materials, workpieces and finished products, the industry often uses the non-destructive testing methods, which do not violate the integrity, operational suitability and reliability of the object under test. This type of quality control is used to examine complex technological equipment, buildings, and constructions.

Currently, one of the most common types of non-destructive testing is ultrasonic one. Devices based on this method allow you to produce images of how the sound waves interact with the materials and thus study the object’s internal structure.

However, modern installations for non-destructive testing are specialized for testing the products with particular parameters. Such devices are difficult to use in scientific research, which involves checking the integrity of objects of various shapes, thicknesses, and sizes.

“We have developed an installation for non-destructive testing of any flat objects, which can be used to detect internal defects in industrial products of various shapes and sizes. We are already actively using our device in the scientific work of the Department of Electroacoustics and Ultrasound Technology.”

Anton Bunakov, a master's student at the Faculty of Information Measurement and Biotechnical Systems of ETU “LETI”

The device consists of four parts: a flaw detector with an ultrasonic transducer, a mechanical positioning system, a control unit for this system and a container of water. In this case, the scientists place the object under test into the container and water acts as a coupling medium, which transmits the ultrasound from the transducer to the object. Usually, in case of manual control, special gels or oils are used for this purpose, and automated devices, such as one developed at LETI, employ the so-called immersion control method, when the object is immersed in the liquid and examined there.

The ultrasonic transducer serves to generate and record sound energy. This element has five axes of movement, two for automated scanning and three for accurate positioning of the sensor along the normal to the object under test. The converter is connected to the flaw detector unit, which processes the received information in real time mode and transmits the results to the computer with special software. The software is also developed by ETU “LETI” specialists. As it is scanned, an image of the product under test appears on the monitor. By studying this image, the scientists can check the object’s internal structure.

“The device has two modes: manual and automated. In the first case, a scientist fully controls the movement of the ultrasound transducer, in the second case, all you have to do is to set the test region and start the scanning process. The recorded measurements at each point will be linked to the coordinate system of the product under test,” Anton Bunakov added.

In the future, the scientists plan to continue improving the device.

Anton Bunakov has presented a model of his installation at the All-Russian competition in the field of non-destructive testing and technical diagnostics “New Generation – 2023”, organized by the Russian Society for Non-Destructive Testing and Technical Diagnostics (RSNDTD). He has become one of the winners.

Anastasia Mustafina, a 4th-year student of the Faculty of Humanities of ETU "LETI"