SU563621A1 - Process of controlling ultrasonic oscillations spreading velocity in sheet material - Google Patents
Process of controlling ultrasonic oscillations spreading velocity in sheet materialInfo
- Publication number
- SU563621A1 SU563621A1 SU7402037341A SU2037341A SU563621A1 SU 563621 A1 SU563621 A1 SU 563621A1 SU 7402037341 A SU7402037341 A SU 7402037341A SU 2037341 A SU2037341 A SU 2037341A SU 563621 A1 SU563621 A1 SU 563621A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- sheet material
- ultrasonic oscillations
- controlling ultrasonic
- spreading velocity
- velocity
- Prior art date
Links
Description
В движущемс листовом материале возбуждают импульсы изгибных ультразвуковых волн Лэмба с помощью излучающего преобразовател . Импульс ультразвуковых волн распростран етс по листовому материалу и частично излучаетс в окружающую среду. В плоской части листового материала амплитуда излучаемых волн относительно мала, но на рассто нии /1 от излучающего преобразовател , т. е. в зоне изгиба, амплитуда излучаемых в окружающую среду ультразвуковых волн значительно возрастает, так как в зоне изгиба материала получаетс скачок нат жени . Поскольку скорость ультразвука зависит от нат жени листа в зоне изгиба материала, она мен етс скачкообразно. Поэтому в зоне изгиба скачком мен етс акустическое сопротивление материала, что вызывает частичное отрал ение акустической волны от зоны изгиба. Из-за этого увеличиваетс нормальна составл юща колебательного смещени листового материала и, следовательно, повышаетс амплитуда излучаемого в окружающую среду зондирующего сигнала.In a moving sheet material, pulses of bending ultrasonic Lamb waves are excited by a radiating transducer. A pulse of ultrasonic waves propagates through the sheet material and is partially emitted into the environment. In the flat part of the sheet material, the amplitude of the emitted waves is relatively small, but at a distance of / 1 from the radiating transducer, i.e., in the bending zone, the amplitude of the ultrasonic waves emitted into the environment increases significantly, since a tension jump is obtained in the bending zone of the material. Since the speed of ultrasound depends on the tension of the sheet in the zone of bending of the material, it varies in steps. Therefore, in the bending zone, the acoustic resistance of the material changes abruptly, which causes a partial separation of the acoustic wave from the bending zone. Because of this, the normal component of the vibrational displacement of the sheet material increases and, therefore, the amplitude of the probing signal emitted into the environment increases.
Излучаемые листовым материалом ультразвуковые колебани принимают с помощью бесконтактного преобразовател , определ ют врем распространени ультразвуковых колебаний в движущемс листовом материале.Ultrasonic vibrations emitted by the sheet material are received by means of a contactless transducer, and the time of propagation of the ultrasonic vibrations in the moving sheet material is determined.
При известной базе измерени /i расчетным путем определ ют скорость распространени With a known measurement base / i, the rate of propagation is determined by calculation
ультразвуковых колебаний в листовом материале .ultrasonic vibrations in the sheet material.
Поскольку скорость распространени ультразвуковых колебаний св зана с механическими свойствами исследуемого материала, то по этой скорости можно контролировать механические свойства и качество исследуемого материала.Since the propagation velocity of ultrasonic vibrations is related to the mechanical properties of the material under study, it is possible to control the mechanical properties and the quality of the material under investigation at this speed.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7402037341A SU563621A1 (en) | 1974-06-26 | 1974-06-26 | Process of controlling ultrasonic oscillations spreading velocity in sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7402037341A SU563621A1 (en) | 1974-06-26 | 1974-06-26 | Process of controlling ultrasonic oscillations spreading velocity in sheet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU563621A1 true SU563621A1 (en) | 1977-06-30 |
Family
ID=20588807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7402037341A SU563621A1 (en) | 1974-06-26 | 1974-06-26 | Process of controlling ultrasonic oscillations spreading velocity in sheet material |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU563621A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2270488A1 (en) * | 2009-07-02 | 2011-01-05 | Kabushiki Kaisha Toshiba | Stiffness detector, stiffness detection method, and paper sheet processor including stiffness detector |
-
1974
- 1974-06-26 SU SU7402037341A patent/SU563621A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2270488A1 (en) * | 2009-07-02 | 2011-01-05 | Kabushiki Kaisha Toshiba | Stiffness detector, stiffness detection method, and paper sheet processor including stiffness detector |
| US8181958B2 (en) | 2009-07-02 | 2012-05-22 | Kabushiki Kaisha Toshiba | Stiffness detector, stiffness detection method, and paper sheet processor including stiffness detector |
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