10.14489/td.2017.06.pp.026-033

2017, 06 June

DOI: 10.14489/td.2017.06.pp.026-033

Danilov V. N., Voronkova L. V.
JUST ABOUT THE PHYSICAL BASICS OF ULTRASONIC TRANSDUCER PHASED ARRAY IN SIMPLE TERMS. PART 1
(pp. 26-33)

Abstract. This article is the first in a series of the publications about the transducer phased array (TPA). They are supposed to give simple description of the physical basics of operation of such transducers without any formulas, which is available to inspectors of all skill levels, the features for differentiating TPA from transducers with regular (whole)piezoelectric element, the advantages and limitations of their application. The features of the TPA straight line signal and the influence of several factors on its characteristics are discussed below. It is shown that the increase of its amplitude in several times at ranges of up to 2 – 3 values of the transducer aperture is provided due to the focus signal TPA in the radiation. The absence of the interference signals of the elementary sources forming the TPA makes the monotony of the dependence of the amplitude of the signal only from TPA range on the acoustic axis when focusing at each point. The area of forming directivity characteristic linear TPA can be roughly defined as its near field, the size of which is approximately equal to its aperture. Increasing the size of the grating elements in the near field of the TPA may lead to low transmitting signal and loss of focus.

Keywords: phased array, focal distance, directivity characteristic, nearfield, probe axis.

+ - About the Authors Click to collapse

V. N. Danilov, L. V. Voronkova (JSC RPA “CNIITMASH”, Moscow, 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

1. Voronkov I. V., Voronkova L. V., Danilov V. N. (2013). Transducers with phased arrays. Moscow: Izdatel'skii dom «Spektr». [in Russian language]
2. Danilov V. N., Voronkova L. V. (2015). Fundamentals of the theory and application of some aspects of the phased array transducers. Moscow: Izdatel'skii dom «Spektr». [in Russian language]
3. Klyuev V.V. (Ed.), Ermolov I. N., Lange Iu. V. (2006). Nondestructive testing. Handbook. In 8 volumes. Vol. 3. Ultrasonic inspection. 2nd Ed. (revised and complemented). Moscow: Mashinostroenie. [in Russian language]
4. Danilov V. N. (2010). Some peculiarities of the signal of direct linear transducer with phased array in radiation mode. Defektoskopiia, (10), pp. 59-74. [in Russian language]
5. Danilov V. N., Ermolov I. N. (2003). About assessing the extent of the near-rectangular zone converter. Defektoskopiia, (5), pp. 3-8. [in Russian language]
6. Ermolov I. N. (1981). Theory and practice of ultrasonic inspection. Moscow: Mashinostroenie. [in Russian language]
7. Danilov V. N. (2009). Calculation of acoustic field of angle beam probe in the far field zone. Defektoskopiia, (12), pp. 36-51. [in Russian language]
8. Danilov V. N. (2015). About some features of formation of signals and definition of the size of a near field for a normal probes with piezoelectric plates and phased arrays. Part 2. Kontrol'. Diagnostika, (5), pp. 18-26. doi: 10.14489/td.2015.05.pp.018-026 [in Russian language]
9. Ermolov I. N., Vopilkin A. Kh., Badalian V. G. (2000). Calculations in ultrasonic testing: quick reference. Moscow: NPTs NK «EKhO». [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 fill out the form below: