CN102284513A - Collimating mechanism for convexity instrument - Google Patents
Collimating mechanism for convexity instrument Download PDFInfo
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- CN102284513A CN102284513A CN2011101262582A CN201110126258A CN102284513A CN 102284513 A CN102284513 A CN 102284513A CN 2011101262582 A CN2011101262582 A CN 2011101262582A CN 201110126258 A CN201110126258 A CN 201110126258A CN 102284513 A CN102284513 A CN 102284513A
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Abstract
The invention relates to a collimating mechanism for a convexity instrument, which belongs to the field of nuclear technology applications. The collimating mechanism comprises two sets of collimating devices with the same structure, wherein each set of collimating device comprises three-stage collimators which are distributed in sequence along the ray direction of a ray source from the first stage to the third stage. The first-stage collimator comprises a first tungsten plate; the second-stage collimator comprises a second tungsten plate, a third tungsten plate, a fourth tungsten plate, a fifth tungsten plate, two installing plates, a bottom plate, a flat plate and a fixed block; the two installing plates are arranged on and connected with the flat plate which is connected with the bottom plate, are connected with the second tungsten plate and the fifth tungsten plate respectively, and are connected with each other; a spring is pressed between the flat plate and the fixed block; the third-stage collimator comprises a sixth tungsten plate which is fixed by a jack screw; by three-stage collimation, the ray bundle transmitted by the ray source becomes a collimating ray bundle, so that the problem that the ray bundle transmitted by the convexity instrument for the ray source does not have the collimating function is solved, and the detecting accuracy of a product is improved.
Description
Technical field
The invention belongs to the Application of Nuclear Technology field, particularly detect the profile gauge collimation mechanism of steel mill's steel rolling production-line steel band.
Background technology
Profile gauge is the key equipment that steel mill's strip material is produced and controlled, and the tranverse sectional thickness that can instantaneously measure steel band continuously distributes.The structure of profile gauge, as shown in Figure 1, agent structure is a C shape frame 11, and tested steel band 12 passes between the underarm from the C shape frame, and radiographic source 13 is positioned at C shape frame upper arm inside, and radiographic source is two X-ray machines, and two X-ray machines are identical, and the segment distance of being separated by is placed; Ray detector 14 is positioned at C shape frame underarm inside, comprises two row's detector arrays, and every row's detector array distributes along straight line, comprises the individual independently ray detector unit of hundreds of.Respectively corresponding two X-ray machines of two row's detector arrays.
Two X-ray machines are launched X ray simultaneously downwards, pass tested steel band 12 from two radiogenic X ray from two different angles, utilize two row's detectors to measure the attenuation degree of two beam X-rays respectively.
This profile gauge is selected COMET MXR-225/02/FB type X-ray machine for use, and the beam that this X-ray machine sends is an oval cone-beam, and the solid angle of its major axis is 90 °, and the solid angle of minor axis is 30 °.And the solid angle of the relative X-ray machine of detector only is 45 ° * 0.34 °, and therefore the beam angle much smaller than X-ray machine sends need collimate to the beam that X-ray machine sends by collimater.Collimater be not only for radiation safety the unnecessary alpha ray shield that sends by radiographic source, the more important thing is that unnecessary ray can produce a large amount of scattered rays, these scattered rays enter detector, increase the noise of detector, reduce the certainty of measurement of equipment.Beam is collimated, and is the link that a lot of radionetric survey equipment all must be considered.
The parts that send ray in the X-ray machine are target spot, and target spot is not that the diameter in the ideal is a bit of 0, but the disk with certain diameter, the target spot diameter of this X-ray machine is 5.5mm.The problem that the imperfect point source of target spot brings is, the beam that sends by circular target spot through collimation after, in the collimater back, can form three zones, blind zone, penumbra region and complete shadow.The blind zone refers to zone that can't see target spot fully, and this no radiation exposure in zone is positioned at the outermost both sides; The penumbra region refers to the zone that can see the part target spot, and there is radiation exposure in this zone, but intensity is lower, and skewness, and this zone is between blind zone and complete shadow; The complete shadow refers to the zone that can see whole target spots, and this zonal ray intensity is the strongest, and this zone that is evenly distributed is positioned at centre position.Therefore, the ray of complete shadow is beneficial to measurement most.As shown in Figure 2, ray 23 is tangent with the left side of target spot 21, join with upper edge, the left side a point of the collimating slit of collimater 22, ray 24 is tangent with the right side of target spot 21, joins with lower edge, the left side b point of collimating slit, and opposite side is symmetrical fully, ray is behind collimation, c point left side and f point right side are the blind zone, and cd zone and ef zone are the penumbra region, and the de zone is the complete shadow.
This profile gauge requirement, two row's detector arrays lay respectively in the complete shadow of its pairing X-ray machine.
Simultaneously, because this profile gauge adopts two cover X-ray machine-combinations of detectors, and two X-ray machines shine (mode that some similar devices adopts staggered irradiation) simultaneously, so, also require any row's detector array only by its pairing X-ray machine irradiation, and can not be by two outer X-ray machine irradiations.Because the solid angle of the relative X-ray machine of spacing between two row's detectors only is 0.46 °, so collimation has proposed very high requirement.
To sum up, the requirement of this profile gauge collimation is: shield unnecessary X ray; Detector is covered by the complete shadow of the beam of its corresponding X-ray machine; The ray that sends from two X-ray machines is distinguished, make it only shine its pairing a certain row's detector array, and can not shine other row's detector array.
Summary of the invention
The objective of the invention is for a change existing profile gauge equipment beam is lacked the problem of the function that collimates, design a kind of profile gauge collimation mechanism, improved the precision that product detects.
The profile gauge collimation mechanism that the present invention proposes is characterized in that, this collimation mechanism comprises the collimator apparatus of two cover same structures, and every cover collimation device includes 3 grades of collimaters, arranges successively from the first order to third level collimater along a radiogenic directions of rays.
This first order collimater can comprise that the middle part has the first tungsten plate of rectangular opening, and vertical symmetry axis of this rectangular opening overlaps with the major axis of the beam of radiographic source emission.
This second level collimater can comprise second, third, the 4th, the 5th block of tungsten plate, first installing plate, the centre has second installing plate of half slot, the base plate that has guide rail and central rectangular aperture, be installed in the flat board that has central rectangular aperture on the base plate, this dull and stereotyped central rectangular aperture is corresponding with the central rectangular aperture position of base plate, is installed in the fixed block on the base plate, be provided with spring between this flat board and the fixed block, with so that flat board can on base plate, move horizontally; This first, second installing plate symmetry is erect and is placed dull and stereotyped central rectangular aperture both sides, this second tungsten plate, the 3rd tungsten plate level respectively place on the end face of first, second installing plate, the 4th tungsten plate, the 5th tungsten plate are erect respectively on the medial surface that places first, second installing plate, form the collimating slit of adjustable width between the 4th tungsten plate, the 5th tungsten plate.
This third level collimater can comprise that the upper and lower end face of the 6th tungsten plate, the 6th tungsten plate both sides fixed by jackscrew respectively.
Through behind these three grades of collimations, the beam of being launched by radiographic source is effectively shielded on long axis direction.On the short-axis direction, be collimated into and be the collimation beam of irradiation detector array of along straight line arranging corresponding only with it, and this beam all is positioned at the complete shadow of radiographic source target spot, and can not shine the detector array that another arranges parallel placement, the radiogenic relatively solid angle of spacing between two row's detector arrays only is 0.46 °, the problem that the beam that profile gauge equipment is launched radiographic source lacks the function that collimates is solved, and has improved the precision that product detects.
Description of drawings
Fig. 1 is the profile gauge structural representation.
Fig. 2 is ray collimator complete shadow, penumbra region schematic diagram.
Fig. 3 is a collimation mechanism principle schematic of the present invention.
Fig. 4 is the first order collimator structure schematic diagram of the embodiment of the invention.
Fig. 5 is the second level collimator structure schematic diagram of the embodiment of the invention.
Fig. 6 is the third level collimator structure schematic diagram of the embodiment of the invention.
The specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
Embodiment
The profile gauge that the present invention is directed to adopts the combination of two cover radiographic source-detector arrays, as shown in Figure 1, is directions X with the direction perpendicular to C shape frame upper arm end face 16, is the Y direction with the direction perpendicular to C shape frame side 17.At directions X as shown in Figure 3, among the figure, the placement of on the same rectilinear direction of directions X, being separated by of two X-ray machines, detector array is arranged along directions X, and two row's detector arrays 35,36 are parallel.
The X-ray beam that X-ray machine sends is an oval cone-beam, and major axis is along directions X, and minor axis is along the Y direction, and angle is 90 ° * 30 °.On X, Y direction, the solid angle of the relative X-ray machine of detector array is 45 ° * 0.34 ° equally, and as shown in Figure 3, on the Y direction, the angle of the relative X-ray machine of distance between two row's detector arrays 35,36 is 0.46 °.The beam that the requirement X-ray machine sends only is radiated at its corresponding detector array and lists behind collimation, lists and can not be radiated at other row's detector array.And because the target spot of X-ray machine has certain diameter (5.5mm), ray can form complete shadow and penumbra region behind collimation, also requires corresponding detector array all to be positioned at the complete shadow.
As shown in Figure 3, X-ray machine 31, detector array 36 are combination 1, and combination 2 and its are with face 38 symmetric arrangement (not marking among the figure).Corresponding with it, collimation mechanism also has two identical covers, with face 38 symmetric arrangement.The 1st grade of collimater 32 shown in Fig. 3, the 2nd grade of collimater 33,3rd level collimater 34 are and combination 1 a corresponding cover collimation mechanism.
This profile gauge is made up of the collimation mechanism of two cover same structures with collimation mechanism, and every suit collimation mechanism includes 3 grades of collimaters, arranges successively along a radiogenic directions of rays from the first order to the third level.
The structure of described first order collimater as shown in Figure 4, is that a thickness is the first tungsten plate of 10mm, and this thickness is enough to the ray that X-ray machine sends is stopped fully.The rectangular opening that vertically has 15 * 60mm 41 of the first tungsten plate, during installation, vertical symmetry axis of this rectangular opening 41 overlaps with the major axis of X-ray machine beam.From then on beam passes through in the hole, and all the other rays are blocked fully.Behind this level collimation, 90 ° * 30 ° beam is reduced to 50 ° * 10 °.And the required angle of directions X is 45 °, no longer beam is made further collimation on directions X.The relative position of this grade collimation and X-ray machine is maintained fixed.
The structure of described second level collimater, as Fig. 5 a, 5b, shown in the 5c, comprise that thickness is second of 10mm, the 3rd, the 4th, the 5th block of tungsten plate 51,52,53,54, vertically there is first installing plate 55 of through hole at the middle part of both sides, second installing plate 56 that screwed hole is arranged on the position of the through hole on corresponding first installing plate, the base plate 513 that has guide rail and central rectangular aperture, the flat board 57 that has central rectangular aperture, the central rectangular aperture of this flat board 57 is corresponding with the position of the central rectangular aperture of base plate 513, be installed in the fixed block 518 on base plate 513 right sides, shown in Fig. 5 b, be installed in the left side of base plate 513 and withstand first jackscrew 519 of dull and stereotyped side, be installed in dull and stereotyped 57 left sides and withstand second jackscrew 520 of the first installing plate side, shown in Fig. 5 a; In these base plate 513 central rectangular aperture side longitudinally, also have slotted hole 516, also have slotted hole 59 in the vertical both sides of the central rectangular aperture of this flat board 57, shown in Fig. 5 c; These first, second installing plate 55,56 symmetries are erect and are placed dull and stereotyped 57 central rectangular aperture both sides longitudinally, between this first, second installing plate 55,56 and dull and stereotyped 57, connect by the bolt 58 that passes slotted hole 59 respectively, between this first, second installing plate 55,56, connect by the bolt 510 that passes through hole on first installing plate 55 and the bolt hole on second installing plate 56, be installed with compression spring 511 on this bolt 510, the two ends of this compression spring 511 withstand on respectively on the medial surface of first, second installing plate 55,56; This flat board 57 places on the base plate 513, and can between this flat board 57 and the base plate 513, connect by the bolt 515 that passes slotted hole 516 in base plate 513 upper edge guide rail translations; This second tungsten plate 51, the 3rd tungsten plate 52 level respectively place on the end face of first, second installing plate 55,56, this second tungsten plate 51, the 3rd tungsten plate 52 are used for stopping the ray that short-axis direction is unnecessary, the 4th tungsten plate 53, the 5th tungsten plate 54 are erect on the medial surface that places first, second installing plate 55,56 respectively, form the collimating slit of the adjustable width between 33,37 among Fig. 3 between the 4th tungsten plate 53, the 5th tungsten plate 54, this collimating slit is along directions X; Four springs 517 are arranged between this flat board 57 and the fixed block 518, the two ends of these four springs 517 withstand on respectively dull and stereotyped 57 with the medial surface of fixed block 518 on, with so that flat board can move horizontally left at base plate upper edge guide rail, shown in Fig. 5 b; Be equipped with straight pin 512 on dull and stereotyped 57, second installing plate 56 that longitudinal middle part has half slot can rotate around this straight pin.
Position, width and the angle of the collimating slit between the 4th tungsten plate 53, the 5th tungsten plate 54 can be regulated accurately.Still can easily regulate after guaranteeing to be installed on the equipment to whole second level collimation, all regulatory functions are all carried out in front shown in Fig. 5 a and bottom surface.After beam collimated through this level, its complete shadow covered detector array 36 just, as shown in Figure 3.
Realize by rotation first jackscrew 519 position of collimating slit.Dextrorotation first jackscrew 519 makes dull and stereotyped 57 to drive collimating slit to 514 translations of forward position guide rail; Left-handed 519, dull and stereotyped 57 drive collimating slit steps back under the pressure of spring 517.Jackscrew pitch is 1mm, and the jackscrew corresponding dull and stereotyped 57 translation 1mm that rotate a circle therefore can be by the anglec of rotation of control jackscrew, accurately control dull and stereotyped 57 position of collimating slit just.Following adjusting all similarly.
The width of collimating slit is regulated by two bolts 510.Two bolts adjusted in concert.Dextrorotation two bolts, first installing plate 55, second installing plate 56 are furthered the reduced width of collimating slit by bolt; Left-handed two bolts, first installing plate 55, second installing plate 56 open under the pressure of two springs 511, and the width of collimating slit increases.
The angle of collimating slit is regulated by two jackscrews 520.This second jackscrew 520 by about two jackscrews form, this two jackscrew phases counter regulation, dextrorotation one of them, then left-handed another one, the anglec of rotation is identical.It is as a whole around straight pin 512 rotations that the installing plate 55 of winning, second installing plate 56 are done, and the angle of collimating slit also changes thereupon.
After the position of collimating slit, width and angular adjustment are finished, under base plate 513, tighten two bolts 515, make flat board 57 fixing with base plate 513; Tighten four bolts 58, first installing plate 55, second installing plate 56 are fixed with dull and stereotyped 57.
Described third level collimater as shown in Figure 6, comprises that thickness is the identical support component of the 6th tungsten plate 61 and tungsten plate 61 two ends of 10mm, and the both sides of the 6th tungsten plate 61 are fixing by jackscrew 62,63 respectively.Can accurately regulate respectively with fixing the position at the 6th tungsten plate 61 two ends by regulating jackscrew, and then can regulate accurately the position of the 6th tungsten plate 61 and angle in the horizontal direction.The effect of third level collimater, as shown in Figure 3, stop by 31 send, behind 33 collimations, the penumbra region of directive detector array 35.
Through behind these three grades of collimations, the beam that is sent by X-ray machine is effectively shielded on long axis direction.On the short-axis direction, be collimated into and be the collimation beam of irradiation detector array of along straight line arranging corresponding only with it, and this beam all is positioned at the complete shadow of X-ray machine target spot, and this collimation beam can not shine the only detector array of 0.46 ° parallel placement at interval of another row.
Claims (4)
1. a profile gauge collimation mechanism is characterized in that, this collimation mechanism comprises the collimator apparatus of two cover same structures, and every cover collimation device includes 3 grades of collimaters, arranges successively from the first order to third level collimater along a radiogenic directions of rays.
2. profile gauge collimation mechanism as claimed in claim 1 is characterized in that, this first order collimater comprises that the middle part has the first tungsten plate of rectangular opening, and vertical symmetry axis of this rectangular opening overlaps with the major axis of the beam of radiographic source emission.
3. profile gauge collimation mechanism as claimed in claim 1, it is characterized in that, this second level collimater comprise second, third, the 4th, the 5th block of tungsten plate, first installing plate, the centre has second installing plate of half slot, the base plate that has guide rail and central rectangular aperture, be installed in the flat board that has central rectangular aperture on the base plate, this dull and stereotyped central rectangular aperture is corresponding with the central rectangular aperture position of base plate, be installed in the fixed block on the base plate, be provided with spring between this flat board and the fixed block, with so that flat board can on base plate, move horizontally; This first, second installing plate symmetry is erect the both sides that place dull and stereotyped central rectangular aperture, this second tungsten plate, the 3rd tungsten plate level respectively place on the end face of first, second installing plate, the 4th tungsten plate, the 5th tungsten plate are erect respectively on the medial surface that places first, second installing plate, form the collimating slit of adjustable width between the 4th tungsten plate, the 5th tungsten plate.
4. profile gauge collimation mechanism as claimed in claim 1 is characterized in that, this third level collimater comprises that the upper and lower end face of the 6th tungsten plate, the 6th tungsten plate both sides fixed by jackscrew respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101262582A CN102284513A (en) | 2011-05-16 | 2011-05-16 | Collimating mechanism for convexity instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101262582A CN102284513A (en) | 2011-05-16 | 2011-05-16 | Collimating mechanism for convexity instrument |
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| CN102284513A true CN102284513A (en) | 2011-12-21 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240283A (en) * | 2012-02-08 | 2013-08-14 | 宝山钢铁股份有限公司 | Automatic band steel width detecting method |
| CN110389387A (en) * | 2019-06-06 | 2019-10-29 | 上琛安防科技（上海）有限公司 | Intelligent X-ray security detection equipment collimation, radiographic source and detection acquisition system |
| CN111412845A (en) * | 2020-04-30 | 2020-07-14 | 宝信软件(武汉)有限公司 | Measuring method for measuring thickness of inclined target |
| KR102405696B1 (en) * | 2021-04-28 | 2022-06-08 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR102405693B1 (en) * | 2021-04-30 | 2022-06-08 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR102405697B1 (en) * | 2021-04-28 | 2022-06-08 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR20220148347A (en) * | 2021-04-28 | 2022-11-07 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240283A (en) * | 2012-02-08 | 2013-08-14 | 宝山钢铁股份有限公司 | Automatic band steel width detecting method |
| CN103240283B (en) * | 2012-02-08 | 2015-01-21 | 宝山钢铁股份有限公司 | Automatic band steel width detecting method |
| CN110389387A (en) * | 2019-06-06 | 2019-10-29 | 上琛安防科技（上海）有限公司 | Intelligent X-ray security detection equipment collimation, radiographic source and detection acquisition system |
| CN111412845A (en) * | 2020-04-30 | 2020-07-14 | 宝信软件(武汉)有限公司 | Measuring method for measuring thickness of inclined target |
| KR102405696B1 (en) * | 2021-04-28 | 2022-06-08 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR102405697B1 (en) * | 2021-04-28 | 2022-06-08 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR20220148347A (en) * | 2021-04-28 | 2022-11-07 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR102549603B1 (en) * | 2021-04-28 | 2023-06-30 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
| KR102405693B1 (en) * | 2021-04-30 | 2022-06-08 | 주식회사 씨엔아이 | Radiation detection instrument for non-destructive inspection |
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Application publication date: 20111221 |