CN104101892A - X-ray and guide rail parallel system - Google Patents
X-ray and guide rail parallel system Download PDFInfo
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- CN104101892A CN104101892A CN201410325978.5A CN201410325978A CN104101892A CN 104101892 A CN104101892 A CN 104101892A CN 201410325978 A CN201410325978 A CN 201410325978A CN 104101892 A CN104101892 A CN 104101892A
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Abstract
The invention relates to an X-ray and guide rail parallel system. The X-ray and guide rail parallel system comprises an X-ray emergent device and an ionization chamber adjusting device, wherein the X-ray emergent device is provided with an X-ray tube; the ionization chamber adjusting device is provided with a first guide rail. The X-ray emergent device is used for an ionization chamber or an area array flat panel detector, and the ionization chamber or the area array flat panel detector receives X-rays. When the X-rays irradiate the area array flat panel detector, the emergent position of the X-rays of the X-ray tube is adjusted, so that the light beam center of the X-rays coincides with the center of the area array flat panel detector; the relative distance between the area array flat panel detector and the emergent position of the X-rays is changed, the emergent position of the X-rays is adjusted again, so that the light beam center of the X-rays coincides with the center of the area array flat panel detector again; the emergent position of the X-rays of the X-ray tube continues being adjusted until the light beam center of the X-rays coincides with the center of the area array flat panel detector all the time, and the X-rays are parallel to a first guide rail. Through the X-ray and guide rail parallel system, the X-rays can be parallel to the guide rail conveniently.
Description
Technical field
The present invention relates to a kind of X ray and guide rail parallel system, relate in particular to a kind of X ray for X-radiation field and guide rail parallel system.
Background technology
X ray standard radiation appliance is for the calibrating of X-radiation instrument, calibration and detection, and the field such as industrial nondestructive testing, but existing equipment can not be realized the axial adjustment of X ray main beam, or adjustment process is complicated, be difficult to realize X-ray beam main shaft, beam-defining jaw center and radiac instruments locating device (locating laser line) coaxial, especially under locating device is positioned over compared with the variable situation of long guideway up stroke, be difficult for especially realizing, thereby cannot guarantee to be subject to test examination instrument equipment detector center in X ray beam center, also cannot guarantee that it is in homogeneous radiation Yezhong, meanwhile, existing equipment mostly is locked formula, adjusts beam and fixedly after X-ray tube, should not dismantle, and be difficult to reset, and which is in use because of vibrations after dismounting, and the reasons such as collision are also difficult to reset after causing position to change, prior art adopts manual switchover mode conventionally to the filtration adjustment of X-ray beam radiation quality simultaneously, in the more situation of radiation quality, cannot realize conversion faster, moreover most of laboratory is all that an X-ray tube is joined an additional rotating disk that filters, when using more radiation beam standard, need to dismantle operations such as filtering rotating disk, very inconvenient, some solutions are exactly that polygamy is put X-ray machine quantity, to lab space, the existing equipments such as opertaing device all do not make full use of like this.
Summary of the invention
The object of the invention is the defect for prior art, a kind of X ray and guide rail parallel system are provided, in order to realize X ray and guide rail parallel easily.
For achieving the above object, the invention provides a kind of X ray and guide rail parallel system, described system comprises:
X ray beam emitter, has X-ray tube, for outgoing X ray;
Ionization chamber regulating device, has the first guide rail, and described X ray beam emitter is positioned at the correspondence position of a side of described ionization chamber regulating device, and for setting up ionization chamber or face battle array flat panel detector, described ionization chamber or face battle array flat panel detector receive described X ray;
Wherein, when described x-ray bombardment is at described battle array flat panel detector, adjust the X ray outgoing position of described X-ray tube, make beam center and the face battle array flat panel detector center superposition of X ray; Change the relative distance of described battle array flat panel detector and described X ray beam emitter, again adjust the X ray outgoing position of described X-ray tube, the beam center that makes X ray again with face battle array flat panel detector center superposition; The X ray outgoing position of continuing to adjust described X-ray tube, until the beam center of X ray overlaps with face battle array flat panel detector center always, reaches described X ray and described the first guide rail parallel.
Further, described X ray beam emitter comprises:
X ray shield assembly, is fixed on optical table, comprising:
Front apron, by inner side the first stereotype and outside the first aluminium sheet bonding composition, the leakage ray of the x-ray photon main beam direction that shielding X-ray tube produces, has X ray perforation hole on described front apron, and perforation hole has diaphragm;
Backboard, by inner side the second stereotype and outside the second aluminium sheet bonding composition, the x-ray photon of backboard described in shielding directive;
Two sides baffle plate, forms by aluminium sheet is bonding inner side the 3rd stereotype and outside the 3rd, is connect and is established, the x-ray photon of two sides baffle plate described in shielding directive by screw and described front apron and backboard;
Upper cover, is connect and is established by screw and described front apron, backboard and two sides baffle plate, the x-ray photon of upper cover described in shielding directive;
Bracing frame, for supporting described front apron, backboard, two sides baffle plate and upper cover;
X ray adjusting gear, is contained in described X ray shield assembly, comprising:
Vertical lifting is adjusted platform, has sway brace and first rotating shaft of intersection, thereby by rotating described the first rotating shaft, changes the intersecting angle adjusting height of described sway brace;
Before and after level, adjust platform, be erected at described vertical lifting and adjust on platform, there is the second rotating shaft;
Angular setting platform, is located in described the second rotating shaft, and described angular setting platform is edge and the translation of X ray light beam parallel direction in described the second rotating shaft;
Platform is adjusted in horizontal shift, has set up described X-ray tube, and has been slidably installed on described angular setting platform, along the translation of described X ray light beam vertical direction; Described horizontal shift is adjusted platform and is rotated and angular motion with described angular setting platform;
X ray filtering device, is placed in before the X ray perforation hole of described X ray shield assembly, and described X ray filtering device comprises:
Fixed part, is fixed on described optical table;
The first rotating disk, has the first rotation axis and first and filters mounting hole, utilizes described the first rotation axis and described fixed part to be coupling, and in described the first filtration mounting hole, the first lens barrel is installed, and described the first lens barrel has the first filter;
The second rotating disk, has the second rotation axis and second and filters mounting hole, utilizes described the second rotation axis and described fixed part to be coupling, and in described the second filtration mounting hole, the second lens barrel is installed, and described the second lens barrel has the second filter;
Wherein, when described the first rotating disk and the second rotating disk go to working position, working position the first filter and working position the second filter are aimed at described X ray perforation hole, the X ray that described X-ray tube is launched, by the outgoing of described X ray perforation hole, filters by described working position the first filter and working position the second filter.
Further, the thickness of the first stereotype of described front apron is the thickness of the x-ray photon of shielding X-ray tube under largest tube voltage; The thickness of described the first stereotype is greater than the thickness of described the second stereotype and the 3rd stereotype; On the baffle plate of described two sides, there is the circular hole that high voltage cable passes into;
Described angular setting platform comprises: disk, is located in described the second rotating shaft; Articulated structure, is connected with described disk, and described disk and described articulated structure relatively rotate; Optical table, is connected with described articulated structure, by described articulated structure, moves, and described optical table and described disk pitch rotation.
Further, described horizontal shift is adjusted on platform and is utilized the clamping of light pipe fixing hoop to launch the X-ray tube of described X ray;
Described the first rotating disk is identical with the radius of the second rotating disk, and described the first filter is identical with the radius of the second filter;
Described first filters mounting hole arranges at the first-class angle of circumference of described the first rotating disk, and described second filters mounting hole arranges at the first-class angle of circumference of described the second rotating disk;
Described the first filter is successively according to energy being sequentially arranged in smoothly on described the first rotating disk from low to high, and described the second filter is successively according to energy being sequentially arranged in smoothly on described the second rotating disk from low to high;
The material of described the first filter and the second filter is metal, and the material of described metal is highly purified aluminium, copper, tin or lead;
The order that difference the first filter in described the first lens barrel should reduce according to atomic number in irradiation beam direction is arranged; The order that difference the second filter in described the second lens barrel should reduce according to atomic number in irradiation beam direction is arranged;
Described X ray filtering device also comprises: first controls motor, is fixed on described fixed part, and under the control of host computer, controls described the first dial rotation; Second controls motor, is fixed on described fixed part, and under the control of host computer, controls described the second dial rotation.
Further, described ionization chamber regulating device comprises:
Pedestal, has the first guide rail on described pedestal;
Ionization chamber position regulator, comprising:
One-level movable object-carrying stage, is slidably installed on the first guide rail, translation on described the first guide rail, and there is the second guide rail, and described the first guide rail is along described X ray main beam direction, and described the second guide rail is vertical with the direction of described the first guide rail;
Secondary movable object-carrying stage, is slidably installed on described the second guide rail translation on described the second guide rail;
Three grades of movable object-carrying stages, connect with described secondary movable object-carrying stage, comprise vertical lifting adjustment platform, and described vertical lifting is adjusted on platform has fixture clamping ionization chamber, for regulating the height of described ionization chamber;
Wherein, regulate the translation on described the first guide rail of one-level movable object-carrying stage, the translation on described the second guide rail of secondary movable object-carrying stage, vertical lifting is adjusted platform and is regulated described ionization chamber height, make laser center aim at the sensitive volume center of described ionization chamber, described laser center is identical with described X ray main beam center.
Further, described secondary movable object-carrying stage comprises: slide block, establish with described the second guide rail cunning; Leading screw, one end is connected with motor, and the other end is connected with described slide block, by described motor, drives leading screw to drive described slide block to slide at described the second guide rail;
Described vertical lifting is adjusted sway brace and the first rotating shaft that platform has intersection, thereby by rotating described the first rotating shaft, changes the intersecting angle adjusting height of described sway brace.
Further, described fixture comprises:
Subbase, described subbase has threaded hole, utilizes screw and support platform to fix;
Support bar, is screwed onto on described subbase, and the upper end of described support bar has socket;
Clamp head, described clamp head comprises:
Fixed part, described fixed part utilizes connecting link to be plugged on the socket of described support bar;
Moving-member, comprises Metallic rod, and one end of Metallic rod is plugged on described fixed part, and the other end utilizes web member to fix, and on described web member, has opened screw; Clamping part, is socketed in described Metallic rod; Adjuster bar, is screwed onto in described screw, and one end is adjusting head, and the other end and described clamping part fix;
Wherein, while regulating described adjusting head, be arranged in adjuster bar and described Metallic rod parallel in described screw, adjuster bar drives described clamping part and described fixed part jointly to clamp ionization chamber.
Further, the material of described subbase, support bar, fixed part, connecting link, clamping part and web member is organic glass; The material of described Metallic rod and adjuster bar is metal; The opposite face of described fixed part and clamping part is plane or arcwall face, and the opposite face of described clamping part and fixed part is plane or arcwall face.
Further, described battle array flat panel detector is that air ionization chamber is equidistantly lined up 32 * 32 matrixes.
X ray of the present invention and guide rail parallel system have realized X ray and guide rail parallel easily.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of X ray of the present invention and guide rail parallel system;
Fig. 2 A is the schematic diagram of the X ray beam emitter of X ray of the present invention and guide rail parallel system;
Fig. 2 B is the vertical view of the X ray beam emitter of X ray of the present invention and guide rail parallel system;
Fig. 3 A, be the front view of the X ray shield assembly of X ray of the present invention and guide rail parallel system;
Fig. 3 B is the side view of the X ray shield assembly of X ray of the present invention and guide rail parallel system;
Fig. 3 C is the vertical view of the X ray shield assembly of X ray of the present invention and guide rail parallel system;
Fig. 4 A is the schematic diagram of the X ray adjusting gear of X ray of the present invention and guide rail parallel system;
Fig. 4 B is the front elevation of the X ray adjusting gear of X ray of the present invention and guide rail parallel system;
Fig. 5 is the schematic diagram of the X ray filtering device of X ray beam emitter of the present invention;
Fig. 6 A is the schematic diagram of the ionization chamber regulating device of X ray of the present invention and guide rail parallel system;
Fig. 6 B is the working state schematic representation of the ionization chamber regulating device of X ray of the present invention and guide rail parallel system;
Fig. 7 A is the schematic diagram of the fixture of X ray of the present invention and guide rail parallel system;
Fig. 7 B is the vertical view of the clamp head of X ray of the present invention and guide rail parallel system.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Fig. 1 is the schematic diagram of X ray of the present invention and guide rail parallel system, as shown in the figure, the present invention includes X ray beam emitter 1, ionization chamber regulating device 2.
X ray beam emitter 1, has X-ray tube 9, for outgoing X ray 10.Ionization chamber regulating device 2 has the first guide rail 210.X ray beam emitter 1 is positioned at the correspondence position of a side of ionization chamber regulating device 2, and for setting up ionization chamber or face battle array flat panel detector, ionization chamber or face battle array flat panel detector receive X ray.Face battle array flat panel detector can equidistantly be lined up 32 * 32 matrixes for air ionization chamber, also can air ionization chamber be set at matrix four jiaos.
When x-ray bombardment is at face battle array flat panel detector, adjust the X ray outgoing position of X-ray tube, make beam center and the face battle array flat panel detector center superposition of X ray; The relative distance of change face battle array flat panel detector and X ray beam emitter, adjusts the X ray outgoing position of X-ray tube again, the beam center that makes X ray again with face battle array flat panel detector center superposition; The X ray outgoing position of continuing to adjust X-ray tube, until the beam center of X ray overlaps with face battle array flat panel detector center always, reaches X ray and the first guide rail parallel.
Fig. 2 A and Fig. 2 B are schematic diagram and the vertical view of the X ray beam emitter of X ray of the present invention and guide rail parallel system, and as shown in the figure, X ray beam emitter comprises: X ray shield assembly 11, X ray adjusting gear 12 and X ray filtering device 13.X-ray tube 9 is erected on X ray filtering device 13, and X ray shield assembly 11, X ray adjusting gear 12 and X ray filtering device 13 are all fixed on optical table 8, and X ray adjusting gear 12 is contained in X ray shield assembly 11.
Fig. 3 A, Fig. 3 B and Fig. 3 C are respectively front view, side view and the vertical view of the X ray shield assembly of X ray of the present invention and guide rail parallel system, as shown in the figure, X ray shield assembly specifically comprises: front apron 111, backboard 112, two sides baffle plate 113, upper cover 114 and bracing frame.
Front apron 111 is by inner side the first stereotype and outside the first aluminium sheet bonding composition, the leakage ray of the x-ray photon main beam direction that shielding X-ray tube produces; Backboard 112 is by inner side the second stereotype and outside the second aluminium sheet bonding composition, the x-ray photon of shielding directive backboard; Two sides baffle plate 113 forms by aluminium sheet is bonding inner side the 3rd stereotype and outside the 3rd, is connect and is established, the x-ray photon of shielding directive two sides baffle plate 113 by screw and front apron 111 and backboard 112; Upper cover 114 is connect and is established by screw and front apron 111, backboard 112 and two sides baffle plate 113, the x-ray photon of shielding directive upper cover 114; Bracing frame is used for supporting front apron 111, backboard 112, two sides baffle plate 113 and upper cover 114.
Concrete, front apron 111 is positioned at the direction of the x-ray photon of X-ray tube transmitting, therefore the thickness of the first stereotype that is positioned at the inner side of front apron 111 is last, and the thickness of the first stereotype is determined by the largest tube voltage of X-ray tube, the thickness that guarantees the first stereotype can shield the x-ray photon under largest tube voltage, guarantees can not leak photon in the direction of x-ray photon.
What backboard 112 will shield is not the leakage ray of main beam direction, so the thickness of the second stereotype can be done thinlyyer than the first stereotype of front apron, also can alleviate thus the weight of whole X ray shield assembly.
Equally, two sides baffle plate 113 will shield neither main beam direction leakage ray, so the thickness of the 3rd stereotype also can be done thinlyyer than the first stereotype of front apron, also can alleviate thus the weight of whole X ray shield assembly.In addition, in order to pass into high voltage cable, on two sides baffle plate 113, have circular hole 130.
Front apron 111, backboard 112, two sides baffle plate 113, upper cover 114 form airtight rectangular parallelepiped device together, between by screw, fix.And each baffle plate and upper cover need to be supported by steel frame construction, and punch on bracing frame, for fixing each baffle plate.
So X ray shield assembly can guarantee to reduce to greatest extent X ray scattering composition for the experiment of reference measurement and spectral measurement effectively.
Fig. 4 A and Fig. 4 B are schematic diagram and the front elevation of the X ray adjusting gear of X ray of the present invention and guide rail parallel system, and X ray adjusting gear comprises that vertical lifting is adjusted platform 121, platform 122, angular setting platform 123, horizontal shift adjustment platform 124 are adjusted in level front and back.
Vertical lifting is adjusted sway brace 1210 and the first rotating shaft 1211 that platform 121 has intersection, thereby by rotating the first rotating shaft 1211, changes the intersecting angle adjusting height of sway brace 1210; Before and after level, adjust platform 122 and be erected on vertical lifting adjustment platform 121, there is the second rotating shaft 1221; Angular setting platform 123 is located in the second rotating shaft 1221, and angular setting platform 123 is edge and the translation of X ray light beam parallel direction in the second rotating shaft 1221; Horizontal shift is adjusted platform 124 and is slidably installed in angular setting platform 123, along the translation of X ray light beam vertical direction; Horizontal shift is adjusted platform 124 and is rotated and angular motion with angular setting platform 123.
Concrete, vertical lifting is adjusted platform 121 bottoms and is fixed on the optical table of load-bearing, by rotating the first rotating shaft 11, drives leading screw, adjusts the sway brace of cultrating, and can realize vertical direction (Z axis) elevating movement.
Before and after level, adjust platform 122 and by the second rotating shaft 1221, leading screw is rotated, the handle of rotation the second rotating shaft 1221 can drive the displaced block on leading screw to move along Y-axis, and displaced block and angular setting platform 123 use nuts are closely fixing.
Angular setting platform 123 comprises disk 1230, articulated structure 131 and optical table 1232.Disk 1230, in bottom, is located in described the second rotating shaft 1221 angle of capable of regulating and YZ face
adjust rear lockable.Articulated structure 1231 tops link with optical table 1232, and bottom links with disk 1230, adjust knob and regulate articulated structure 1231, realize the adjusting that platform 122 luffing angles are adjusted in optical table 1232 and level front and back, optional range of adjustment ± 3.
It is concave inward structure that platform 124 tops are adjusted in horizontal shift, tentatively fixedly X-ray tube 9, make movement and rotation that it can only the slight distance of horizontal direction, its end face has screw thread empty, uses nut, coordinates two light pipe fixing hoops 126 can be by X-ray tube fixed head firmly, for preventing vibrations, alleviate vibrations, the reason such as prevent from becoming flexible and cause light pipe position move and rotate, clip 126 liners have good wearing quality, the rubber blanket of resistance to ag(e)ing.Bottom is fixed on angular setting platform 123, realizes level adjustment of displacement to the left and right.
X ray adjusting gear realizes by the mode that adopts X-ray tube five dimensions to regulate the function that X-radiation bundle main shaft is adjusted, and conveniently realizes the collimation of beam and diaphragm, locating device etc.
Fig. 5 is the schematic diagram of the X ray filtering device of X ray of the present invention and guide rail parallel system beam emitter, and as shown in the figure, X ray filtering device specifically comprises: fixed part 133, the first rotating disk 131 and the second rotating disk 132.
Fixed part 133 is fixed on optical table 8; The first rotating disk 131 has the first rotation axis 1310 and first and filters mounting hole 1311, utilizes the first rotation axis 1310 to be coupling with fixed part 133, in the first filtration mounting hole 1311, the first lens barrel 1312, the first lens barrels 1312 is installed and has the first filter; The second rotating disk 132 has the second rotation axis 1320 and second and filters mounting hole 1321, utilizes the second rotation axis 1320 to be coupling with fixed part 133, in the second filtration mounting hole 1321, the second lens barrel 1322, the second lens barrels 1322 is installed and has the second filter; Shown in Figure 1 again, when the first rotating disk 131 and the second rotating disk 132 go to working position, working position the first filter and working position the second filter are aimed at X ray perforation hole 90, the X ray that X-ray tube 9 is launched, by 90 outgoing of X ray perforation hole, filters by working position the first filter and working position the second filter.
Concrete, first filters mounting hole 1311 arranges at the first-class angle of circumference of the first rotating disk 131, and second filters mounting hole 1321 arranges at the first-class angle of circumference of the second rotating disk 132.The first rotating disk 131 and the second rotating disk 132 need have identical radius, guarantee that thus the quantity of filter bores of two rotating disks is identical with angle of circumference, so that software is controlled the rotation of two rotating disks.The first rotating disk 131 and the second rotating disk 132 can also have first of equidimension size and filter mounting hole 1311 and the second filtration mounting hole 1321, so that the first filter of equidimension and processing and the installation of the second filter.
The first filter and the second filter are sheet metal, and material is that purity is not less than 99.9% aluminium, copper, tin or lead, and the thickness of filter determines by required radiation quality, and filter is stuck in a mirror by packing ring, and a cylinder mirror is arranged on rotating disk.Arranging of the first filter and the second filter, the general radiation quality different according to treatment level, diagnostic level or protection level, according to each series of energy being arranged in order smoothly from low to high.The order that difference the first filter in the first lens barrel should reduce according to atomic number in irradiation beam direction is arranged; The order that difference the second filter in the second lens barrel should reduce according to atomic number in irradiation beam direction is arranged.
Again as shown in the figure, also comprise that the first control motor 134 and the second control motor 135, the first control motors 135 are fixed on fixed part 136, and under the control of host computer, control the first rotating disk 131 and rotate; Second controls motor 136 is fixed on fixed part 133, and under the control of host computer, controls the second rotating disk 132 and rotate.
The first filter of X ray filtering device and the second filter can Fast Installation and dismountings, and can be convenient to use in test different filters and combination thereof, use a large ray machine of kilovolt range just can set up a plurality of reference radiation matter, such as ICRU treatment level X ray standard, the narrow spectrum of ISO, wide range series protection level standard, IEC diagnoses RQR, the series such as RQA.Take full advantage of lab space, X ray ray machine, supervisory system, guard system, guide rail movement positioning system, the resources such as measuring system, very large reduction input and the operating cost in laboratory.
The specific works process of X ray filtering device of the present invention is as follows:
1, tentatively install and fix
To survey measured additional the first filter and the second filter, and put on first mounting hole and the second mounting hole of the first rotating disk and the second rotating disk according to each series of energy order from low to high, zero-bit is empty.The fixed part of two rotating disks misplaces a little and is fixed in side by side on optical table, and the working position filter bores of two rotating disks can one in front and one in back be aimed at, and filter bores center and beam centre are coaxial.Open control box, make filtration unit communication normal, now in zero-bit (filter bores is empty).
2, work
Open X-ray tube, rotate first and cross rotating disk to required working position.Ray through diaphragm limit bundle sees through the first filter, forms machine made reference radiation bundle.
During the second filter on need to utilizing the second rotating disk, the first rotating disk is made zero, according to first, cross the method turning and rotate the second rotating disk to required annex filtration place.
Electric control part is divided control velocity of rotation and rotational angle, being converted into current signal sends to the first control motor and second to control motor, thereby drive the first rotating disk and the second rotating disk, by controlling the time of current signal, thereby control the rotational angle of the first rotating disk and the second rotating disk; The position of each filter is recorded the angle of circumference of this position by coding form, arrange corresponding with control software simultaneously.
3, receive and observe
By ionization chamber or energy spectrometer, survey and measure ionization current or power spectrum under this radiation quality, analysis to measure result and reaching a conclusion.
4, continue to regulate
While completing the measurement of this radiation beam standard, by software, rotate the first rotating disk and the second rotating disk, be switched to another radiation quality, regulate tube voltage and electric current corresponding under ray machine radiation quality now simultaneously.When filtration dial rotation puts in place, open ray machine, after stablizing, measure.
The design of X ray filtering device, has well solved the many problems of radiation beam standard, the classification of different series radiation quality can be come and is laid simultaneously; By Electric Machine Control, make experiment and calibration operation realize robotization, can enter laboratory and manually carry out the switching of radiation quality, improved work efficiency and work accuracy.
Fig. 6 A is the schematic diagram of the ionization chamber regulating device of X ray of the present invention and guide rail parallel system, and Fig. 6 B is the working state schematic representation of the ionization chamber regulating device of X ray of the present invention and guide rail parallel system; As shown in the figure, ionization chamber position regulator comprises: pedestal 25 and ionization chamber position regulator 26.
Ionization chamber position regulator 26 comprises one-level movable object-carrying stage 21, secondary movable object-carrying stage 22 and three grades of movable object-carrying stages 23.
On pedestal 25, there is the first guide rail 210.
One-level movable object-carrying stage 21 is slidably installed on the first guide rail 210, translation on the first guide rail 210, and there are the second guide rail 211, the first guide rails 210 along X ray main beam direction, the second guide rail 211 is vertical with the direction of the first guide rail 210; Secondary movable object-carrying stage 22, is slidably installed on the second guide rail 211 translation on the second guide rail 211; Three grades of movable object-carrying stages 23 connect with secondary movable object-carrying stage 22, comprise vertical lifting adjustment platform 230, and vertical lifting is adjusted on platform 230 has fixture 7 clamping ionization chambers, for regulating the height of ionization chamber; Regulate 21 translations on the first guide rail 210 of one-level movable object-carrying stage, secondary movable object-carrying stage 22 translation on the second guide rail 211, vertical lifting is adjusted platform 230 and is regulated ionization chamber height, make laser center aim at the sensitive volume center of ionization chamber, laser center is identical with X ray main beam center.
Concrete, one-level movable object-carrying stage 21 is along the X-axis adjustment of X ray beam direction.Secondary movable object-carrying stage 22 in surface level along the Y-axis adjustment perpendicular to X-direction.Three grades of movable object-carrying stages 23, along the lift adjustment of vertical direction, are Z axis adjustment.
The first guide rail 210 is fixed on pedestal 25, and pedestal 25 is fixed on ground by expansion bolt, and in installation, guarantees afterwards the level of pedestal 25.The flatness levelness of pedestal 25 upper surfaces is less than 1mm, with the horizontality that guarantees that the first guide rail 210 and grating scale are installed.The first guide rail 210 is that two closed slides are fixedly installed on pedestal 25 by screw, and the one-level movable object-carrying stage 21 carrying with top is connected by slide block.Tooth bar is installed on pedestal 25 right sides and is fixed on pedestal 25 by screw, and tooth bar is connected by gear with the one-level movable object-carrying stage motor on the first guide rail 210, in order to complete the accurate movement of whole one-level movable object-carrying stage 21.Grating scale is arranged on the left margin of pedestal, by sensor, realizes the axial accurate location of one-level movable object-carrying stage 21X.One-level article carrying platform 1 is placed in the first guide rail 210 tops, for secondary movable object-carrying stage 22 and three grades of movable object-carrying stages 23, and comprises that two along the second guide rail 211 of Y direction.
Secondary movable object-carrying stage 22 comprises slide block, leading screw and motor, and slide block and the second guide rail cunning are established; One end of leading screw is connected with motor, and the other end is connected with slide block, by motor, drives leading screw band movable slider to slide at the second guide rail.
Concrete, secondary movable object-carrying stage 22 is connected by slide block with 211, the second guide rail.Leading screw is parallel with two second guide rails 211, be placed in guideway centreline, one end is connected with motor, the other end is fixed on (leading screw can be realized rotation) on one-level article carrying platform 1, leading screw passes and is fixed on the structure that secondary movable object-carrying stage 22 lower surfaces are similar to nut device, thereby rotates to realize secondary movable object-carrying stage 22 in the movement of Y direction by driven by motor leading screw.
Three grades of movable object-carrying stages 23 comprise vertical lifting adjustment platform, for example, be the Manual lifting platform of cultrating, and have sway brace and first rotating shaft of intersection, thereby by rotating described the first rotating shaft, change the intersecting angle adjusting height of described sway brace.Also comprise that lappingout leading screw drives, the upper and lower surface multi-hole position design Manual lifting platform of cultrating, is furnished with locking handwheel, fixes by screw with secondary movable object-carrying stage 22.Vertical lifting is adjusted platform upper surface a plurality of threaded holes, can realize fixture and be fixed on hoistable platform upper surface by screw.
Ionization chamber is finally to clamp by fixture, is fixed on three grades of movable object-carrying stages 23.
The fixture that installation and ionization chamber model adapt, on three utmost point movable object-carrying stages 23, takes out ionization chamber to be measured and is clamped by fixture.Connect ionization chamber measuring system.Adjust secondary utmost point article carrying platform and three grades of utmost point article carrying platform positions, make cross laser center (cross laser center is X ray main beam center) impinge upon the sensitive volume center of ionization chamber.
Open afterwards X ray ray machine, X-ray machine parameter is set, rotate the additional rotating disk that filters in experiment required standard place.By stepper motor software control one-level article carrying platform, carry out X-axis and move to working position.Then start to carry out the measurement of ionization chamber ionization current, under this standard, measure complete, save data.Adjust again X-ray machine parameter, adjust X-axis position, measure different specification.
Due to the difference of the type kind of ionization chamber, the standard of measurement is different, therefore need to measure at the diverse location place of distance X ray tube, that is to say the X-axis position adjustment needing in measuring process.Due to the difference of the size of ionization chamber, for making the sensitive volume of ionization chamber be positioned at the center of X ray main beam, therefore different ionization chambers need to carry out the position adjustment of different Y-axis and Z axis.
Finally by completing Y-axis and Z axis moves, the center of the sensitive locations of carrying out ionization chamber in X-ray beam.Move position by X-axis, completes the measurement of different ionization chamber different specification.
Fig. 7 A is the schematic diagram of the fixture of X ray of the present invention and guide rail parallel system, and Fig. 7 B is the vertical view of the clamp head of X ray of the present invention and guide rail parallel system, and as shown in the figure, fixture specifically comprises: subbase 273, support bar 272 and clamp head 271.Clamp head 271 comprises fixed part 2711 and moving-member 2710.
Subbase 273 has threaded hole, utilizes screw and three grades of movable object-carrying stages to fix; Support bar 272 is screwed onto on subbase 273, and the upper end of support bar 272 has socket.
Fixed part 2711 utilizes connecting link 27110 to be plugged on the socket of support bar 272.Moving-member 2710 comprises Metallic rod 27100, and one end of Metallic rod 27100 is plugged on fixed part 2711, and the other end utilizes web member 7101 to fix, and has opened screw 27102 on web member 7101; Clamping part 27103 is socketed in Metallic rod 27100; Adjuster bar 27104 is screwed onto in screw 27102, and one end is adjusting head 27105, and the other end and clamping part 27103 fix.
While regulating adjusting head 27105, be arranged in adjuster bar 27104 and Metallic rod 27100 parallels in screw 27102, adjuster bar 27104 drives the common clamping ionization chamber of clamping part 27103 and fixed part 2711.
Concrete, the material of subbase 273 is machine glass, is 10 centimetres of diameters, the disk of thick 1 centimetre has 9 rounded distributions in minor thread hole, by screw, realizes the fixing of subbase 273 and support platform.There is 1 major thread hole slightly at subbase 273 centers, can realize support bar 272 and be screwed into, for fixed support bar 272.
The material of support bar 272 is organic glass, and the 7 bar 2 bottom bar faces of support are threaded, and can be screwed into subbase 273.Support bar 272 upper ends are that hollow tube assembling structure is socket, can realize the insertion of the connecting link 27110 of clamp head 271, be screwed into fixed part 2711 realize fixing locked by connecting link 27110 upper side.
Fixed part 2711 is a square organic glass body.Clamping part 27103 is socketed in Metallic rod 27100, can move along Metallic rod, concrete shift motion is determined by adjuster bar 27104, utilizes adjusting head 27105 rotation adjuster bars 27104, to realize clamping part 27103, approach and away from fixed part 2711, realize holding function.
The course of work is specific as follows:
Preliminary installation: on screw firm banking dish and ionization chamber three-dimensional regulation platform, according to ionization chamber size, select certain height support bar to be screwed into base disk.According to ionization chamber model, select different clamp head.
The clamping part of clamp head and the opposite face of fixed part can carry out different selections according to the ionization chamber of different model and shape, and for example the face relative to each other of fixed part and clamping part is plane parallel to each other, or symmetrical arcwall face, or parallel cambered surface.
After installing fixture, put into ionization chamber between fixture moving-member and fixed part.Threaded together bar, fixes ionization chamber.
Because ionization chamber model varies in size, therefore fixture of the present invention need to be fixed on different positions ionization chamber, can select the support bar of different length.Because the distinctive appearance structure of ionization chamber, can select different clamp head.Finally complete the fixing of ionization chamber.
Fig. 8 is the schematic diagram of the laser instrument adjusting gear of X ray of the present invention and guide rail parallel system, as shown in the figure, laser instrument adjusting gear specifically comprises: support bar 31, clamper 32, right angle block 33, translation stage 34, lifting table 35, universal stage 36, angular displacement platform 37 and clamper 38.
Clamper 32 utilizes gear structure and described support bar toe joint, on described support bar, vertically moves; Right angle block 33 is fixedly connected with described clamper 32; Translation stage 34 is fixed in described right angle block 33; Lifting table 35 connects with described translation stage 34, under the driving of described translation stage 34 along the vertical translation of X ray beam direction; Universal stage 36 connects with described lifting table 35, vertically translation under the driving of described lifting table 35; Angular displacement platform 37 connects with described universal stage 36, under the driving of described universal stage 36, rotates; Clamper 38 fixes with described angular displacement platform 37, clamping laser instrument 6, under the driving of described angular displacement platform 37, produce angular displacement, the center of the circular light spot that the laser cross center that described laser instrument 6 is produced produces at autoradiography film with described X ray light beam is all the time aimed at, thereby makes the laser cross center of laser instrument consistent with described X ray beam center.
Concrete,
On support bar 31 bottom shaft collars, there are 4 threaded holes, can be screwed into screw and optical table is fixed together; On the whole pole face of vertical direction, there is rack structure, realize clamper moving up and down on whole bar.
Clamper 32 has gear structure, is connected with support bar 31 tooth bars, realizes clamper 32 and moves up and down.While reaching working position, tight a bolt, realize position locked.Clamper 32 is connected by screw and realizes synchronizeing of clamper 32 and right angle block 33 with right angle block 33.
33 two right angle faces of right angle block, a face is connected with clamper 32, and another face carries translation stage 34 as stationary platform, realizes the connection of being fixed on of right angle block 33 and translation stage 34 by screw.
Translation stage 34 is accurate translation stages, is screw is fixedly connected with upper and lower mechanism.Activation point is that side drives.Whose closely-pitched screw rod/differential head of type of drive.Realize 25mm stroke, precision can reach the adjusting of 0.003mm.
Lifting table 35 is accurate lifting table, is screw is fixedly connected with upper and lower mechanism.Type of drive: closely-pitched screw rod/differential head.Realize 25mm stroke, precision can reach the adjusting of 0.005mm.
Universal stage 36 is precision rotation platform, is screw is fixedly connected with upper and lower mechanism.Type of drive: closely-pitched screw rod/differential head.Coarse adjustment: 360 degree, resolution: 0.009 degree.
Angular displacement platform 37 is screw with upper and lower mechanism and is fixedly connected with.Realize the angular adjustment of ± 10 degree.
Clamper 38, is fixed on angular displacement platform 37 by screw, and clamper 38Cong center is divided into upper and lower two halves, is connected by screw upper and lower two parts, need to clamp laser instrument 6 and be put in fixture center pit.
9 laser instruments, produce an orthogonal Cross hair laser and penetrate.Be fixed on clamper 38 centers.
Specific works process is as follows:
1, installation process
Laser instrument adjusting gear is placed in to the guide rail platform end over against X-ray machine.Open laser instrument adjustment clamper height and make rough alignment X-ray machine light hole center, laser cross center, support bar is on guide rail platform.On measuring table, lay an autoradiography film perpendicular to X-ray beam, open after X-ray machine, through overshoot meeting, on film, produce a circular light spot (being a reference surface of roentgenogram launched field), then finely tune translation stage, lifting table, universal stage, angular displacement platform, make laser cross center aim at film with reference to the Yezhong heart.Then, along guide rail direction, move film, guarantee that laser center, all the time at film radiation field size center, that is to say and guaranteed that laser cross center is always X-ray beam center.Thereby realizing the instrument such as ionization chamber to be measured in work accurately locates.Meanwhile, also can put a Laser Modulation and be installed on guide rail platform side, transmitting one vertical linear laser, the accurate location of realizing some measuring position and X-ray machine distance.
2, the course of work
When having instrument or sample to be measured, open guide rail end and side laser instrument, place instrument to be measured on measuring table, adjust measuring table position, make instrument to be measured be positioned at the cross laser central point that end laser instrument is launched, and on the vertical laser rays of side specific range laser instrument transmitting.Position, end laser cross point of crossing is X-ray beam ray center position, and the vertical laser position in side is the measurement position of specific range.
Laser instrument adjusting gear is also referred to as end laser instrument, and Main Function is the ejaculation process of reverse simulation X-ray, makes invisible adventurous X ray become visible laser rays.Thereby can know the position that X-ray beam center is passed through by naked eyes, realize the location of each instrument to be measured.Be that the ray that X ray ray machine produces is to be similar to the taper light beam that torch light is the same, and laser is only lines.Therefore the crosswise laser point of crossing of guide rail tail end transmitting only can embody the center of certain radiation reference surface.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. X ray and a guide rail parallel system, is characterized in that, described system comprises:
X ray beam emitter, has X-ray tube, for outgoing X ray;
Ionization chamber regulating device, has the first guide rail, and described X ray beam emitter is positioned at the correspondence position of a side of described ionization chamber regulating device, and for setting up ionization chamber or face battle array flat panel detector, described ionization chamber or face battle array flat panel detector receive described X ray;
Wherein, when described x-ray bombardment is at described battle array flat panel detector, adjust the X ray outgoing position of described X-ray tube, make beam center and the face battle array flat panel detector center superposition of X ray; Change the relative distance of described battle array flat panel detector and described X ray beam emitter, again adjust the X ray outgoing position of described X-ray tube, the beam center that makes X ray again with face battle array flat panel detector center superposition; The X ray outgoing position of continuing to adjust described X-ray tube, until the beam center of X ray overlaps with face battle array flat panel detector center always, makes described X ray and described the first guide rail parallel.
2. X ray according to claim 1 and guide rail parallel system, is characterized in that, described X ray beam emitter comprises:
X ray shield assembly, is fixed on optical table, comprising:
Front apron, by inner side the first stereotype and outside the first aluminium sheet bonding composition, the leakage ray of the x-ray photon main beam direction that shielding X-ray tube produces, has X ray perforation hole on described front apron, and perforation hole has diaphragm;
Backboard, by inner side the second stereotype and outside the second aluminium sheet bonding composition, the x-ray photon of backboard described in shielding directive;
Two sides baffle plate, forms by aluminium sheet is bonding inner side the 3rd stereotype and outside the 3rd, is connect and is established, the x-ray photon of two sides baffle plate described in shielding directive by screw and described front apron and backboard;
Upper cover, is connect and is established by screw and described front apron, backboard and two sides baffle plate, the x-ray photon of upper cover described in shielding directive;
Bracing frame, for supporting described front apron, backboard, two sides baffle plate and upper cover;
X ray adjusting gear, is contained in described X ray shield assembly, comprising:
Vertical lifting is adjusted platform, has sway brace and first rotating shaft of intersection, thereby by rotating described the first rotating shaft, changes the intersecting angle adjusting height of described sway brace;
Before and after level, adjust platform, be erected at described vertical lifting and adjust on platform, there is the second rotating shaft;
Angular setting platform, is located in described the second rotating shaft, and described angular setting platform is edge and the translation of X ray light beam parallel direction in described the second rotating shaft;
Platform is adjusted in horizontal shift, has set up described X-ray tube, and has been slidably installed on described angular setting platform, along the translation of described X ray light beam vertical direction; Described horizontal shift is adjusted platform and is rotated and angular motion with described angular setting platform;
X ray filtering device, is placed in before the X ray perforation hole of described X ray shield assembly, and described X ray filtering device comprises:
Fixed part, is fixed on described optical table;
The first rotating disk, has the first rotation axis and first and filters mounting hole, utilizes described the first rotation axis and described fixed part to be coupling, and in described the first filtration mounting hole, the first lens barrel is installed, and described the first lens barrel has the first filter;
The second rotating disk, has the second rotation axis and second and filters mounting hole, utilizes described the second rotation axis and described fixed part to be coupling, and in described the second filtration mounting hole, the second lens barrel is installed, and described the second lens barrel has the second filter;
Wherein, when described the first rotating disk and the second rotating disk go to working position, working position the first filter and working position the second filter are aimed at described X ray perforation hole, the X ray that described X-ray tube is launched, by the outgoing of described X ray perforation hole, filters by described working position the first filter and working position the second filter.
3. X ray according to claim 2 and guide rail parallel system, is characterized in that, the thickness of the first stereotype of described front apron is the thickness of the x-ray photon of shielding X-ray tube under largest tube voltage; The thickness of described the first stereotype is greater than the thickness of described the second stereotype and the 3rd stereotype; On the baffle plate of described two sides, there is the circular hole that high voltage cable passes into;
Described angular setting platform comprises: disk, is located in described the second rotating shaft; Articulated structure, is connected with described disk, and described disk and described articulated structure relatively rotate; Optical table, is connected with described articulated structure, by described articulated structure, moves, and described optical table and described disk pitch rotation.
4. X ray according to claim 2 and guide rail parallel system, is characterized in that, described horizontal shift is adjusted on platform and utilized the clamping of light pipe fixing hoop to launch the X-ray tube of described X ray;
Described the first rotating disk is identical with the radius of the second rotating disk, and described the first filter is identical with the radius of the second filter;
Described first filters mounting hole arranges at the first-class angle of circumference of described the first rotating disk, and described second filters mounting hole arranges at the first-class angle of circumference of described the second rotating disk;
Described the first filter is successively according to energy being sequentially arranged in smoothly on described the first rotating disk from low to high, and described the second filter is successively according to energy being sequentially arranged in smoothly on described the second rotating disk from low to high;
The material of described the first filter and the second filter is metal, and the material of described metal is highly purified aluminium, copper, tin or lead;
The order that difference the first filter in described the first lens barrel should reduce according to atomic number in irradiation beam direction is arranged; The order that difference the second filter in described the second lens barrel should reduce according to atomic number in irradiation beam direction is arranged;
Described X ray filtering device also comprises: first controls motor, is fixed on described fixed part, and under the control of host computer, controls described the first dial rotation; Second controls motor, is fixed on described fixed part, and under the control of host computer, controls described the second dial rotation.
5. X ray according to claim 1 and guide rail parallel system, is characterized in that, described ionization chamber regulating device comprises:
Pedestal, has the first guide rail on described pedestal;
Ionization chamber position regulator, comprising:
One-level movable object-carrying stage, is slidably installed on the first guide rail, translation on described the first guide rail, and there is the second guide rail, and described the first guide rail is along described X ray main beam direction, and described the second guide rail is vertical with the direction of described the first guide rail;
Secondary movable object-carrying stage, is slidably installed on described the second guide rail translation on described the second guide rail;
Three grades of movable object-carrying stages, connect with described secondary movable object-carrying stage, comprise vertical lifting adjustment platform, and described vertical lifting is adjusted on platform has fixture clamping ionization chamber, for regulating the height of described ionization chamber;
Wherein, regulate the translation on described the first guide rail of one-level movable object-carrying stage, the translation on described the second guide rail of secondary movable object-carrying stage, vertical lifting is adjusted platform and is regulated described ionization chamber height, make laser center aim at the sensitive volume center of described ionization chamber, described laser center is identical with described X ray main beam center.
6. X ray according to claim 5 and guide rail parallel system, is characterized in that:
Described secondary movable object-carrying stage comprises: slide block, establish with described the second guide rail cunning; Leading screw, one end is connected with motor, and the other end is connected with described slide block, by described motor, drives leading screw to drive described slide block to slide at described the second guide rail;
Described vertical lifting is adjusted sway brace and the first rotating shaft that platform has intersection, thereby by rotating described the first rotating shaft, changes the intersecting angle adjusting height of described sway brace.
7. X ray according to claim 5 and guide rail parallel system, is characterized in that, described fixture comprises:
Subbase, described subbase has threaded hole, utilizes screw and support platform to fix;
Support bar, is screwed onto on described subbase, and the upper end of described support bar has socket;
Clamp head, described clamp head comprises:
Fixed part, described fixed part utilizes connecting link to be plugged on the socket of described support bar;
Moving-member, comprises Metallic rod, and one end of Metallic rod is plugged on described fixed part, and the other end utilizes web member to fix, and on described web member, has opened screw; Clamping part, is socketed in described Metallic rod; Adjuster bar, is screwed onto in described screw, and one end is adjusting head, and the other end and described clamping part fix;
Wherein, while regulating described adjusting head, be arranged in adjuster bar and described Metallic rod parallel in described screw, adjuster bar drives described clamping part and described fixed part jointly to clamp ionization chamber.
8. X ray according to claim 5 and guide rail parallel system, is characterized in that, the material of described subbase, support bar, fixed part, connecting link, clamping part and web member is organic glass; The material of described Metallic rod and adjuster bar is metal; The opposite face of described fixed part and clamping part is plane or arcwall face, and the opposite face of described clamping part and fixed part is plane or arcwall face.
9. X ray according to claim 1 and guide rail parallel system, is characterized in that, described battle array flat panel detector is that air ionization chamber is equidistantly lined up 32 * 32 matrixes.
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