SU1553893A2 - Converter for inspecting the quality of welded joints - Google Patents
Converter for inspecting the quality of welded joints Download PDFInfo
- Publication number
- SU1553893A2 SU1553893A2 SU884448516A SU4448516A SU1553893A2 SU 1553893 A2 SU1553893 A2 SU 1553893A2 SU 884448516 A SU884448516 A SU 884448516A SU 4448516 A SU4448516 A SU 4448516A SU 1553893 A2 SU1553893 A2 SU 1553893A2
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- control
- quality
- reliability
- converter
- acoustic emission
- Prior art date
Links
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Изобретение относитс к неразрушающему контролю и вл етс усовершенствованием известного устройства, описанного в авт. свид. N 962807. Целью дополнительного изобретени вл етс повышение достоверности контрол в издели х с дисперсией скорости звука. Пьезоэлементами 1, 2 и 3 принимают сигналы волны акустической эмиссии, измер ют времена T21 и T32 прохождени волной рассто ний N1 (Θ)-R2Θ) и R2(Θ)-R3(Θ), по отношению которых суд т о направлении прихода волны акустической эмиссии. Отсутствие необходимости учета скорости волны в изделии при определении этого направлени повышает достоверность контрол . 1 ил.The invention relates to non-destructive testing and is an improvement of the known device described in ed. swith N 962807. The purpose of the additional invention is to increase the reliability of the control in products with a dispersion of the speed of sound. The piezoelectric elements 1, 2 and 3 receive the acoustic emission wave signals, measure the times T 21 and T 32 of the wave passing the distances N 1 (Θ) -R 2 ) and R 2 (Θ) -R 3 (Θ), in relation to which judge about the direction of arrival of the acoustic emission wave. The absence of the need to take into account the wave velocity in the product when determining this direction increases the reliability of the control. 1 il.
Description
Изобретение относитс к неразрушающему контролю и касаетс усовер- |Шенствовани известного устройства по авт.св. № 962807.The invention relates to non-destructive testing and concerns the improvement of a known device according to auth. No. 962807.
Целью изобретени вл етс повышение достоверности контрол в издели х с дисперсией скорости звука.The aim of the invention is to increase the reliability of the control in products with a dispersion of the speed of sound.
На чертеже изображен преобразователь дл контрол качества сварных швов.The drawing shows a transducer for monitoring the quality of welds.
Преобразователь содержит чувствительный элемент, выполненный из трех пьезоэлементов 1-3. Внешний пьезоэлемент 1 выполнен в виде кольца с внешним радиусом R, второй (промежуточный) пьезоэлемент 2 - также в виде кольца с внешним радиусом RЈ, а третий пьезоэлемент 3 выполнен в виде витка спирали Архиме- гда с полюсом, совпадающим с центрами колец пьезоэлементов 1 и 2,The transducer contains a sensitive element made of three piezoelectric elements 1-3. The external piezoelectric element 1 is made in the form of a ring with an external radius R, the second (intermediate) piezoelectric element 2 is also in the form of a ring with an external radius RЈ, and the third piezoelectric element 3 is made in the form of a spiral of the Archimegda with a pole coinciding with the centers of the rings of the piezoelectric elements 1 and 2,
Преобразователь дл контрол ка- .ества сварных швов работает следующим образом,Converter for controlling the quality of welds works as follows
При поступлении волны акустической эмиссии на первый пьезоэлемент 1 фиксируетс момент времени t4 ее прихода, Яатем волна акустической эмиссии проходит рассто ние R - R со скоростью v ее распространени в изделии и фиксируетс пьезоэлемен- том 2, Разность t времен прихода волны на пьезоэлементы 2 и 1 может быть выражена какWhen an acoustic emission wave arrives at the first piezoelectric element 1, the instant t4 of its arrival is fixed, and then the acoustic emission wave travels the distance R - R with the speed v of its propagation in the product and is fixed by the piezoelectric element 2, the difference t of the arrival times of the wave at the piezoelectric elements 2 and 1 can be expressed as
41 41
J.il§Li b.9l J.il§Li b.9l
VV
(1)(one)
где R,(0) и Ru(0) - рассто ни от центра преобразовател до внешних контуров пьезоэлементов 1 и 2 соответственно в направлении 9 ,where R, (0) and Ru (0) are the distances from the center of the transducer to the external contours of the piezoelectric elements 1 and 2, respectively, in the direction 9,
1553893415538934
Яатем волна акустической эмиссии проходит рассто ние Ra - R, за врем Then, an acoustic emission wave travels the distance Ra - R,
ъг.fg
, (2), (2)
5five
00
5five
00
00
где R(9) - рассто ние от центра преобразовател до внешнего контура пьезоэлемента 3 в направлении 0 .where R (9) is the distance from the center of the transducer to the external contour of the piezoelectric element 3 in the direction 0.
Азимутальна координата 9 направлени прихода волны акустической эмиссии может быть определена из (1) и (2) какThe azimuth coordinate 9 of the direction of arrival of the acoustic emission wave can be determined from (1) and (2) as
fi v tftlR,(0) - R4(0) ,,fi v tftlR, (0) - R4 (0) ,,
y et „ , (3)y et „, (3)
где Ы- - коэффициент пропорциональности .where L- is the proportionality coefficient.
Дл работоспособности преобразовател требуетс , чтобы величина дроби в выражении (3) не была посто нной . Это достигаетс ее выбором либо монотонно убывающей, либо возрастающей величиной.In order for the converter to work, it is required that the fraction value in expression (3) is not constant. This is achieved by her choice of either a monotonously decreasing or increasing value.
Отсутствие необходимости определени скорости v волны акустической эмиссии повышает достоверность контрол изделий с дисперсией скорости звука.The absence of the need to determine the velocity v of the acoustic emission wave increases the reliability of control of products with a dispersion of the speed of sound.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884448516A SU1553893A2 (en) | 1988-06-24 | 1988-06-24 | Converter for inspecting the quality of welded joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884448516A SU1553893A2 (en) | 1988-06-24 | 1988-06-24 | Converter for inspecting the quality of welded joints |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU962807 Addition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1553893A2 true SU1553893A2 (en) | 1990-03-30 |
Family
ID=21384709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884448516A SU1553893A2 (en) | 1988-06-24 | 1988-06-24 | Converter for inspecting the quality of welded joints |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1553893A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809186A (en) * | 2017-09-22 | 2018-03-16 | 南京邮电大学 | A kind of close-coupled sound wave generating device for broad band low frequency |
| CN109995214A (en) * | 2019-01-15 | 2019-07-09 | 南京邮电大学 | A sound energy conversion device based on electromagnetic induction |
-
1988
- 1988-06-24 SU SU884448516A patent/SU1553893A2/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР № 962807, кл. О 01 N 29/04, 1982. f * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809186A (en) * | 2017-09-22 | 2018-03-16 | 南京邮电大学 | A kind of close-coupled sound wave generating device for broad band low frequency |
| CN109995214A (en) * | 2019-01-15 | 2019-07-09 | 南京邮电大学 | A sound energy conversion device based on electromagnetic induction |
| CN109995214B (en) * | 2019-01-15 | 2024-02-23 | 南京邮电大学 | Acoustic energy conversion device based on electromagnetic induction |
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