10.14489/td.2021.11.pp.058-063

2021, 11 November

DOI: 10.14489/td.2021.11.pp.058-063

Udalova A. P., Chernyshov V. N.
NON-DESTRUCTIVE TESTING METHOD OF MATERIALS AND PRODUCTS THERMOPHYSICAL CHARACTERISTICS USING MICROWAVE HEATING IN PRODUCTS REAL OPERATING CONDITIONS
(pp. 58-63)

Abstract. The article proposes a method for determining the thermophysical characteristics (thermal conductivity and thermal diffusivity) of materials and products based on the results of measurements at two times of the temperature of the surface of the object under study, subjected to pulsed thermal effects from microwave radiation of a given power focused into the line. In the proposed method, the number of pulses and their repetition rate are set adaptively when the steady-state excess temperature at the control points is equal to two predetermined values at two points in time, which makes it possible to carry out non-destructive testing of the investigated objects, since the predetermined temperature values are taken less than the temperature of thermal destruction of the investigated materials, as well as receive information in a frequency-pulse form, which increases the accuracy of the control results and the noise immunity of the method. To implement the proposed method, a microprocessor-based information-measuring system has been developed, which experimentally confirmed the efficiency of the method and the correctness of the theoretical conclusions underlying it. The performed metrological analysis made it possible to draw conclusions about the dominant components of the total error, a more accurate measurement of which will make it possible to purposefully influence their reduction, which will ultimately reduce the total error in the control of the desired thermophysical characteristics.

Keywords: non-destructive testing, thermal diffusivity, thermal conductivity, microwave heating, microprocessor system.

+ - About the Authors Click to collapse

A. P. Udalova, V. N. Chernyshov (Federal State Budgetary Educational Institution of Higher Education “Tambov State Technical University”, Tambov, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

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