10.14489/td.2015.05.pp.018-026

2015, 05 May

DOI: 10.14489/td.2015.05.pp.018-026

Danilov V.N.
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
(pp. 18-26)

Abstract. On the basis of computer simulation of activity of the normal probe with the phased array (FA) the estimation of the size of a near field of such probe as with linear FA and FA of the rectangular form is justified. Within the limits of a near field the formation of the directivity characteristic of the probe implements, and outside of its decreasing of a signal amplitude on a probe axis at deleting from the probe takes place on relation for a far field. The features of formation of signals and definition of the size of a near field of the probe with FA are condi-tioned at a focusing of a signal in each point of a probe axis by absence of local maxima, as against the probe with piezoelectric plate.

Keywords: normal probe, phased array, size of a near field, far field, directivity characteristic, decreasing of a signal amplitude on a probe axis, sum signal, focusing, two dimensional phased array.

+ - About the Authors Click to collapse

V. N. Danilov
PJSC RPA “CNIITMASH”, Moscow, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Danilov V. N., Voronkov I. V. (2010). Modeling of the operation of the direct converter with phased array in radiation mode. Defektoskopiia, (7), pp. 3-17.
2. Danilov V. N. (2010). Some peculiarities of the signal of direct linear transducer with phased array in radiation mode. Defektoskopiia, (10), pp. 59-74.
3. Kliuev V. V. (Ed.), Ermolov I. N., Lange Iu. V. (2004). Non-destructive testing. Handbook. In 8 volumes. Vol. 3. Ultrasonic inspection. Moscow: Mashinostroenie.
4. Ermolov I. N., Vopilkin A. Kh., Badalian V. G. (2000). The calculations in ultrasonic testing: brief handbook. Moscow: NPTs NK «EKhO».
5. Ermolov I. N. (1992). Ultrasonic testing: brief handbook. Moscow: NPO TsNIITMASh.
6. Danilov V. N., Voronkov I. V. (2013). Modelling back-wall echo of a normal linear probe with the phased array. Kontrol'. Diagnostika, (7), pp. 27-34.
7. 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 1. Normal probes with piezoelectric plates. Kontrol'. Diagnostika, (4), pp. 18-28. doi: 10.14489/td.2015.04.pp.018-028
8. Danilov V. N. (2011). Study of operation of the transducer with two-dimensional phased array in radiation mode. Defektoskopiia, (7), pp. 29-48.

+ - 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: