Laser centering mount for x-ray radiator

FIELD: mechanical engineering; radiation method of inspection of materials and items.

SUBSTANCE: centering mount has housing inside which the laser is disposed as well as first reflector mounted onto axis of laser in front of exit window of X-ray radiator is the point where axis of laser crosses axis of X-ray beam, second reflector mounted onto axis of laser outside the projection of exit window of X-ray reflector for rotation relatively axis being perpendicular to plane formed by axes of laser beam and X-ray. Device also has aids for indicating focal length made in form of pointer provided with scale fixed onto housing of centering mount. Flat collimated laser beam forming system is mounted in front of laser. Laser beam propagates along plane being parallel to vertical plane crossing longitudinal axis of X-ray radiator. The axis is at the same time perpendicular to vertical plane crossing axis of X-ray beam. The second reflector is mounted at the exit of system at laser axis. Beam splitter is mounted between first and second reflectors. In front of the beam splitter there is the second semiconductor laser which is mounted onto axis being perpendicular to axis of laser to cross its point of crossing with beam splitter.

EFFECT: improved precision of measurements; simplified application.

4 dwg

 

The invention relates to non-destructive testing using x-ray radiation and can be used for control of materials and products radiation method in various engineering industries.

Known laser centralizer for x-ray emitter containing body located therein a laser with two-sided output radiation, the optical axis of which is parallel to the longitudinal axis of the x-ray emitter, two reflector, the first of which was installed at the intersection of the axis of the laser with the axis of the x-ray beam, and the second is mounted on the axis of the laser outside the projection on it of the output window of the x-ray emitter can be rotated around an axis perpendicular to the plane defined by the axis of the laser and the axis of the x-ray beam; means for indicating the focal length in the form of a pointer with a scale attached to the body of the clamp, the clamp is provided with two cylindrical lenses mounted on the axis of the laser with the possibility of rotation relative to it and generates the object image illuminated strips, forming either the crosshair used for guidance of the centralizer on the test object, or a system of two parallel strips, the distance between which is proportional to the distance of the object. Count down the distance to the object is produced on the indicator at the time of combining this the x bands due to the rotation of the second reflector [1].

The disadvantage of this device is the use of scarce and difficult in the operation of a gas laser with double-sided output radiation, and how the implementation of the triangulation method of measuring the distance to the object based on the registration application form cylindrical lenses parallel stripes on each other during rotation of the second reflector, since the accuracy of the alignment is substantially less than the nominal registration method of matching images bands [2]. In addition, the length of the strips formed on the object, a single cylindrical lens changes when you change the focal length, which also leads to less accurate measurements.

The purpose of the invention is the elimination of these disadvantages.

For this purpose, the centralizer instead of a gas laser with double-sided output radiation applied standard semiconductor laser, before the laser on its optical axis is set anamorphic telescopic lens, consisting of a cylindrical lens and a lens forming flat collimated laser beam, the plane of propagation parallel to the vertical plane passing through the longitudinal axis of the x-ray emitter, and perpendicular to the vertical plane passing through the axis of the x-ray beam, the second reflector is installed on the ihade anamorphic telescopic system so he reflects on the object, only the lower half generated by this system to the plane of the beam on the axis of the laser between the first and second reflectors has a beam splitter in front of which on an axis perpendicular to the axis of the laser and passing through the point of intersection with the beam splitter, retrofitted with a laser, the radiation of which by means of the beam splitter and the first reflector is directed to the object and forms an image on it of a bright point, the location of which coincides with the point of intersection of the object with the axis of the x-ray beam, while the lasers are connected in series and due to this, on the object image formed either bright points used for aiming the x-ray emitter on the desired area of the test object or the image of two located one above the other bands, one of which is generated on the object by the first reflector when the design on the top half of the collimated laser beam is stationary, and the second formed by projection onto the second object reflector lower part of the collimated beam, movable and is moved during rotation of the second reflector parallel to the upper stationary strip prior to their nominal alignment, which is the reference focal distance on the scale means of its display.

The invention is illustrated in the drawing (erti a-g), on which the circuit device and the field of view of the centralizer while hovering over the object (Fig 1-b), in the process of combining parallel strips triangulation range finder for measuring the distance to the object (drawing) and at the time of readout of the distance to the object at a nominal combination of these bands (drawing d).

Laser centralizer contains the x-ray radiator 1, to which is attached the housing 2 located therein lasers 10 and 13, which are respectively parallel and perpendicular to the longitudinal axis of the x-ray emitter mounted on the axis of the laser cylindrical lens 8 and the lens 7, forming anamorphic telescopic system, the output of which is formed flat parallel laser beam, the plane of which is parallel to the vertical plane passing through the longitudinal axis of the x-ray emitter and perpendicular to the vertical plane passing through the axis of the x-ray beam.

The second reflector 4 is mounted on the axis of the laser for rotation about an axis perpendicular to the plane formed by the axes of the laser and the x-ray beam, and is connected with means for indicating the focal length of 11, consisting of index 5 and scale 6, fixed to the body of the centralizer.

The beam splitter 12 is installed on the axis of the laser at an angle of 45° to it. Otragatel the 3 made of plexiglass and mounted on the axis of the laser at the point of intersection with the axis of the x-ray beam, moreover, the plane of the first reflector and the beam splitter to form a straight dihedral angle. Before the beam splitter on an axis passing through the point of its intersection with the axis of the laser and perpendicular thereto, a second semiconductor laser 13, which forms at the object through the beam splitter and the first reflector bright point coinciding with the point of intersection with the axis of the x-ray beam.

The second reflector 4 is mounted underneath the axis of the laser so that it reflects the object 1 only the lower half of the flat beam generated anamorphic telescopic system (drawing, view A) and a height d.

Laser centralizer works as follows.

At the first stage of his work he performs the function pointer and is used for accurate aiming axis of the x-ray beam for forming the target area. The first laser 10 is activated and the laser 13 is enabled and using the beam splitter 12 and the first reflector 3 forms on the object 11 a bright dot, the position of which coincides with the point of intersection of its axis x-ray beam (drawing b).

At the second stage, the centralizer is used as a triangulation rangefinder. When the laser 13 is turned off, and the laser 10 is turned on and using anamorphic telescopic system forms a plane parallel beam of laser radiation.

While on the object image formed spaced one above the other bands of light, having a height of d/2, where d is the height of the flat beam emerging from the collimator (drawing in). When the rotation of the second reflector 4 and the lower stripe is moved relative to the upper stationary strip. At the time of their moralnego combining (drawing g), when they represent a single strip, on a scale of 6 with the pointer 5 is the reference focal length associated with the rotation angle of the first beam splitter 4 ratio D=B/tgαwhere In - base rangefinder, i.e. the distance between the centers of the first reflector 3 and the second reflector 4, α - the angle between the axis of the x-ray beam and the direction of the center of the first beam splitter at the time of combining mobile and fixed lines.

The principle moralnego combination allows 3-5 times to improve the accuracy of alignment of the strips, and, accordingly, the accuracy of the measurement of the focal length.

Literature

1. RF patent №2106619. Laser centralizer for x-ray emitter.

2. Lundov AV visual Ergonomics of human activity. Leningrad: Mashinostroenie, 1985, 126 S.

Laser centralizer for x-ray emitter containing body located therein the laser optical axis parallel to the longitudinal axis of the x-ray emitter, the first reflector made of plexiglass, mounted on the axis of the laser in front of the exit window of the x-ray emitter in the point p is the intersection " with the axis of the x-ray beam, a second reflector mounted on the axis of the laser outside the projection on it of the output window of the x-ray emitter with a possibility of rotation about an axis perpendicular to the plane formed by the axes of the laser and x-ray beams, means indicating the focal length in the form of a pointer with a scale attached to the casing centralizer, wherein the centralizer used a standard semiconductor laser, before the laser on its optical axis is set anamorphic telescopic system consisting of a cylindrical lens and lens and forming a flat collimated laser beam propagating in a plane parallel to a vertical plane passing through the longitudinal axis of the x-ray emitter, and perpendicular to the vertical plane passing through the axis of the x-ray beam, the second reflector has a vertical dimension equal to half the height of the flat laser beam is set at the output anamorphic telescopic system so that it reflects the object only the lower half of the flat laser beam and generates the object image of the moving strip, moved by the rotation of the second reflector parallel to the above images fixed band formed when designing on the Declaration of the CT first reflector upper half of the flat laser beam until they moralnego combination, which is the reference focal distance on the axis of the laser between the first and second reflector has a beam splitter in front of which on an axis perpendicular to the axis of the laser and passing through the point of intersection with the beam splitter, a second semiconductor laser that generates the object through the beam splitter and the first reflector, the image of the bright point, the position on the object coincides with the point of its intersection with the axis of the x-ray beam, with the inclusion of the first and second lasers separately.



 

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