|
|
|
|
|
|
|
|
|
Sweep length (ut)
| Глоссарий терминов по технологиям неразрушающего контроля (NDT) |
Length of time or distance represented by the horizontal base line on an a-scan.
|
|
Horizontal, английский
- Горизонталь; горизонтальный
- Горизонталь; горизонтальный 287
- At right angles to the direction of gravity; on the level; parallel to the horizon; neither vertical nor inclined.
- A direction parallel to the horizon, or what is commonly termed lying flat. one of the greatest inconveniences navigators have to struggle with is the frequent want of a distinct sight of the horizon. to obviate this a horizontal spinning speculum was adopted by mr. lerson, who was lost in the victory man-of-war, in which ship he was sent out to make trial of his instrument. this was afterwards improved by smeaton, and consists of a well-polished metal speculum about 3-1/2 inches in diameter, inclosed within a circular rim of brass, so fitted that the centre of gravity of the whole shall fall near the point on which it spins. this is the end of a steel axis running through the centre of the speculum, above which it finishes in a square for the convenience of fitting a
|
Damping (ut), английский
Limiting the duration of and/or decreasing the amplitude of vibrations, as in damping of a transducer element; also designates a bond inspection method in which good bonds are verified by damping ultrasonic energy transmitted to the back surface.
Screens, lead (rt), английский
Layers of lead foil, used in intimate contact with the film during exposure. they act to improve radiographic quality or to decrease exposure time, or both.
|
|
|
|
|
|
|
