| 摘要 |
FIELD: machine building. ^ SUBSTANCE: here is disclosed laser centrator containing laser range finder and TV-camera of visible range of spectrum. Optical axes of both are parallel to each other and to axis of X-ray-radiation beam. Further, the centrator consists of a circular matrix of micro-lasers forming a circular structure on an object. A shape and dimensions of this structure coincide with similar parametres of an X-rayed zone. Perpendicularity of axis of an X-ray beam to surface of an inspected object is assessed by degree of ellipticity of this zone image. Additionally, there is introduced an X-ray sensitive photo-matrix positioned on surface of the object opposite to the X-ray emitter in the centre of the zone, where there is installed a cassette with a radiographic film. A video signal of the X-ray sensitive photo-matrix is transmitted to a computer via a cable or radio channel and is visualised on a screen of a display simultaneously and/or successively with an image generated with the TV-chamber of the visible range of spectre. A diaphragm with a cross-like cut of dimension of HFV (high-frequency vibration) out of material non-transparent for X-ray-radiation is arranged on axis for input-output of X-ray beam at distance H from a lens of an X-ray tube. Also, cross centre coincides with this axis. An image of this cross is visualised on the display. Dimension of the HFV cross is chosen with consideration of ratio B*=BTmax/H<C, where B* is dimension of magnified shadowy X-ray image of cross in plane of the X-ray sensitive matrix of CùC dimension, and Tmax is maximal distance of the centrator to the object. The centrator is positioned on a movable base with a remote control. The cross image centre is conjugated with the display screen centre by transfer of the movable base. ^ EFFECT: control over position zone X-rayed from side of object opposite to X-ray emitter. ^ 4 dwg |
