SU819692A1 - Sheet material ultrasonic testing method - Google Patents
Sheet material ultrasonic testing method Download PDFInfo
- Publication number
- SU819692A1 SU819692A1 SU782568775A SU2568775A SU819692A1 SU 819692 A1 SU819692 A1 SU 819692A1 SU 782568775 A SU782568775 A SU 782568775A SU 2568775 A SU2568775 A SU 2568775A SU 819692 A1 SU819692 A1 SU 819692A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- sheet material
- testing method
- ultrasonic testing
- transducer
- material ultrasonic
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
(54) СПОСОБ УЛЬТРАЗВУКОВОГО КОНТРОЛЯ ЛИСТОВЫХ МАТЕРИАЛОВ(54) METHOD OF ULTRASOUND CONTROL SHEET MATERIALS
Эта цель достигаетс тем, что ультразвуковую волну возбуждают таким образом.,. что величина угла, образованного проекцией вектора ее распространени на плоскость контролируемого материала и нормешьно к его кромке, больше половины угла раствора диаграммы направленности преобразовател .This goal is achieved by the fact that the ultrasonic wave is excited in this way.,. that the magnitude of the angle formed by the projection of the vector of its propagation onto the plane of the material being monitored and normal to its edge is more than half the angle of the transducer beam pattern.
Способ заключаетс в следующем. Устанавливают преобразователь над контролируен зШ материалом так, что проекци главной оси преобразовател (соответствующа вектору распространени волны) на плоскость материала и нормально к его кромке была болыле половины угла раствора диаграммы направленности преобразовател . Возбуждают ультразвуковые колебани . Принимают отраженные колебани от кромки материала и от дефектов . При таком расположении преобразовател отраженные колебани от кромки не попадут на преобразователь , работающий в эхо режиме. При отражении же упругой волны от дефектов в листах, полосах, лентах (проколы,, расслоени , инородные включени ) эти услови нарушсштс и имеет место отражение волн назад к преобразователю .. Так, в случае прокола, например, в ленте длина волны превышает размер преп тстви , что обуславливает отражение назад, а в случае расслоени к такому же результату приводит его неровна поверхнрсть . Дл обеспечени отношени , амплитуд сигналов от дефекта и кромки издели , увеличивающего чувствительность УЗ контрол , величина угла , образованного проекцией вектора распростран ющейс волны на плоскость контролируемого издели и нормалью к его кромке, должна превышать половину угла раствора диагрс1ммы направленности преобразовател .The method is as follows. The transducer is installed above the controlled material 3, so that the projection of the main axis of the transducer (corresponding to the wave propagation vector) onto the plane of the material and normally to its edge was less than half the angle of the transducer radiation pattern. Excites ultrasonic vibrations. The reflected vibrations are received from the edge of the material and from defects. With this arrangement, the transducer reflected oscillations from the edge will not fall on the transducer operating in echo mode. When the elastic wave is reflected from defects in sheets, strips, ribbons (punctures, delaminations, foreign inclusions), these conditions are disturbed and the waves are reflected back to the transducer. This leads to reflection back, and in the case of a bundle, its uneven surface leads to the same result. To provide a ratio, the amplitudes of the signals from the defect and the edge of the product, which increases the sensitivity of the ultrasonic control, the angle formed by the projection of the vector of the propagating wave onto the plane of the controlled product and the normal to its edge must exceed half the angle of the transducer directional error.
По соотношению отраженных сигналов суд т о размере дефектов.Based on the ratio of the reflected signals, the size of the defects is judged.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782568775A SU819692A1 (en) | 1978-01-05 | 1978-01-05 | Sheet material ultrasonic testing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782568775A SU819692A1 (en) | 1978-01-05 | 1978-01-05 | Sheet material ultrasonic testing method |
Publications (1)
Publication Number | Publication Date |
---|---|
SU819692A1 true SU819692A1 (en) | 1981-04-07 |
Family
ID=20744158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782568775A SU819692A1 (en) | 1978-01-05 | 1978-01-05 | Sheet material ultrasonic testing method |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU819692A1 (en) |
-
1978
- 1978-01-05 SU SU782568775A patent/SU819692A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Neubauer | Ultrasonic reflection of a bounded beam at Rayleigh and critical angles for a plane liquid‐solid interface | |
Wilcox et al. | Lamb and SH wave transducer arrays for the inspection of large areas of thick plates | |
US4165649A (en) | Apparatus and method for ultrasonic inspection of highly attenuative materials | |
EP0003658A3 (en) | Improvements in or relating to an ultrasonic nondestructive testing apparatus | |
Hall | Observing ultrasonic wave propagation by stroboscopic visualization methods | |
SU819692A1 (en) | Sheet material ultrasonic testing method | |
JP4452001B2 (en) | Flaw detection method and flaw detection apparatus using phased array | |
JPS6264949A (en) | Method for ultrasonic flaw detection | |
US4763524A (en) | Automatic underwater acoustic apparatus | |
Stearn | The concentration of dynamic stress in a plate at a sharp change of section | |
JP2001050941A (en) | Variable angle ultrasonic probe and variable angle ultrasonic flaw-detecting device | |
CN112710733B (en) | Method for measuring oblique incidence emission characteristics of underwater acoustic material by pulse tube | |
SU662857A1 (en) | Method of ultrasonic flaw detection of articles | |
Erhard et al. | Creep Waves in Ultrasonic Testing--Physical Principles, Application in Welded Constructions | |
SU1056048A1 (en) | Ultrasonic mirror mask flaw detection method | |
SU864114A1 (en) | Method of exciting shear waves in articles | |
SU1479871A1 (en) | Method of ultrasonic weld quality testing | |
SU1237967A1 (en) | Ultrasonic method of checking peeling of coating from base | |
JPS6475962A (en) | Ultrasonic flaw detection apparatus | |
SU1659542A1 (en) | Sensor of linear density of fibrous product | |
Shevtsov et al. | Propagation of Lamb waves generated by the angle beam wedge actuator in the plastic panel | |
SU1249444A1 (en) | Method of tuning ultrasonic flaw detector | |
SU864112A1 (en) | Shear wave sensor | |
SU1104410A1 (en) | Converter for measuring speed of sound in materials | |
JPS5766355A (en) | Method for deciding aggregation organization of steel plate and material property depending upon aggregation organization by means of on-line system |