10.14489/td.2020.01.pp.038-043

2020, 01 January

DOI: 10.14489/td.2020.01.pp.038-043

Mordasov S. A., Negulyaeva A. P., Chernyshov V. N.
MICROWAVE HEATING IN THE SYSTEM OF NON-DESTRUCTIVE TESTING OF THE THERMOPHYSICAL CHARACTERISTICS OF BUILDING MATERIALS AND PRODUCTS
(pp. 38-43)

Abstract. A new method is proposed for determining the thermophysical characteristics (thermal conductivity and thermal diffusivity) of building materials and products according to the results of measurements at two points in time of the surface temperature of the object under study, which is subjected to pulsed thermal effect from a given power focused into the line of microwave radiation. In the proposed method, the number of pulses and their repetition rate are set adaptively when the steady-state excess temperature is reached at the control point with two predetermined values at two points in time, which allows non-destructive testing of the studied objects, since the preset temperature values are taken 20…30 % less temperature thermal decomposition of the studied materials, as well as receive information in the frequency-pulse form, which increases the accuracy of the control results and noise method To implement the proposed method, a microprocessor-based information-measuring system has been developed that has experimentally confirmed the efficiency of the method and the correctness of its theoretical conclusions.

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

+ - About the Authors Click to collapse

S. A. Mordasov, A. P. Negulyaeva, 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. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Fokin V. N., Chernyshov V. N., Boykov G. P. (2005). Method for non-destructive testing of thermophysical characteristics of solid materials. Ru Patent No. 2250454. Russian Federation. [in Russian language]
2. Chernyshov V. N., Golikov D. O., Chernyshov A. V. (2010). The method of determining the thermophysical characteristics of building materials (options). Ru Patent No. 2399911. Russian Federation. [in Russian language]
3. Chernyshov A. V., Ivanov G. N. (2007). Non-destructive testing method for thermophysical properties of multilayer heat-protective coatings and products. Kontrol'. Diagnostika, 108(6), pp. 50 – 54. [in Russian language]
4. Chernyshov A. V. (2003). Non-destructive testing method for thermophysical characteristics of multilayer products. Kontrol'. Diagnostika, (6), pp. 40 – 44. [in Russian language]
5. Golikov D. O., Chernyshov V. N., Chernyshov A. V., Poluhin V. I. (2011). The microwave method and the system of non-destructive testing of the thermophysical characteristics of building materials. Vesti vysshih uchebnyh zavedeniy Chernozem'ya, (1), pp. 8 – 12. [in Russian language]
6. Chernyshov A. V., Golikov D. O., Chernyshov V. N. (2013). Method for non-destructive testing of thermophysical characteristics of building materials and products. Ru Patent No. 2497105. Russian Federation. [in Russian language]
7. Chernyshov V. N., Zharikova M. V., Chernyshov A. V. (2018). The microwave method of non-destructive testing of the thermophysical characteristics of building materials. Zavodskaya laboratoriya. Diagnostika materialov, Vol. 84, (10), pp. 29 – 34. [in Russian language] DOI: 10.26896/1028-6861-2018-84-10-29-34.
8. Pyushner G. (1968). Ultra high frequency energy heating. Moscow: Energiya. [in Russian language]
9. Klyuev V. V. (Ed.) (1976). Devices for non-destructive testing of materials and products: handbook, Vol. 2. Moscow: Mashinostroenie. [in Russian language]
10. Chernyshov V. N., Chernyshova T. I. (2016). Methods and information-measuring systems of non-destructive testing of thermophysical properties of materials and products. Saint Petersburg: Ekspertnye resheniya. [in Russian language]
11. Lykov A. V. (1967). Theory of thermal conductivity. Moscow: Vysshaya shkola. [in Russian language]
12. Franchuk A. U. (1969). Tables of thermotechnical indicators of building materials. Moscow: NII stroitel'noy fiziki. [in Russian language]

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

The cost of a single article is 350 rubles. (including VAT 18%). After you place an order within a few days, you will receive following documents to your specified e-mail: account on payment and receipt to pay in the bank.

After depositing your payment on our bank account we send you file of the article by e-mail.

To order articles please copy the article doi:

10.14489/td.2020.01.pp.038-043

and fill out the form