CN219936688U - Collimation device for auxiliary detector pixel array crosstalk degree test - Google Patents
Collimation device for auxiliary detector pixel array crosstalk degree test Download PDFInfo
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Abstract
The utility model discloses a collimation device for auxiliary detector pixel array crosstalk degree test, which relates to the field of performance test of radiation imaging detector arrays, and aims to solve the problems that collimation slotted holes of the existing collimator are formed by splicing two plates, the spliced collimation slotted holes are rough, and the size and shape accuracy of ray bundles emitted by a ray source are low after the ray bundles pass through the collimation slotted holes; moreover, the conventional collimator generally has the problem that the collimator can only move and cannot deflect. It comprises the following steps: a base support; the Z-axis rotating mechanism is arranged on the base support frame, and the driving end of the Z-axis rotating mechanism rotates around the Z axis relative to the base support frame; the Y-axis deflection assembly is arranged on the Z-axis rotating mechanism, and the driving end of the Y-axis deflection assembly rotates around the Y axis relative to the Z-axis rotating mechanism; the X-axis deflection assembly is arranged on the Y-axis deflection assembly, and the driving end of the X-axis deflection assembly rotates around the X axis relative to the Y-axis deflection assembly; and the ray baffle is arranged on the X-axis deflection assembly.
Description
Technical Field
The utility model relates to the field of performance test of a radiation imaging detector array, in particular to a collimation device for auxiliary detector pixel array crosstalk degree test.
Background
CT imaging technology has been widely used in industry and medical industry, and with the rapid development of CT imaging technology, it has become a very important detection means in related fields such as image diagnosis in industry and medical industry. The detector subsystem in the CT imaging device is a core component of an industrial and medical CT system, the performance of the detector subsystem has a great influence on the quality of images, and the crosstalk degree is an important index of the performance of the detector.
The two-dimensional spliced detector module is a core component of the detector subsystem, and in the research work of the crosstalk degree of the pixel array of the two-dimensional spliced detector module, the accurate quantitative evaluation of the crosstalk degree is one of important points and difficulties. In a conventional test experiment of crosstalk, high-precision collimation is often required to be performed on a ray beam emitted by a ray source (such as an X-ray tube), the shape of the ray beam is precisely limited to be a narrow line shape or a dot shape, and the ray beam falls into a prediction area of the end face of the detector array after being vertically incident on the end face of the detector array, so that good accuracy and repeatability of a crosstalk measurement result are ensured.
The shape of a fan-shaped or cone-shaped wide beam ray beam emitted by a ray source subsystem in the traditional CT imaging equipment is required to be restrained by an existing collimator, however, the crosstalk degree test of a detector applied to a laboratory by the existing collimator has obvious defects, mainly because a collimation slot hole of the existing collimator is formed by splicing two plates, the spliced collimation slot hole is rough, and the size and shape precision of the ray beam emitted by the ray source are low after the ray beam passes through the collimation slot hole; moreover, because the detector is limited by processing and assembly precision, the array end face of the detector after installation is easy to deviate to a certain extent, and is difficult to be completely perpendicular to the horizontal ground, the existing collimator is generally only capable of moving and cannot deviate, when the ray beam is injected into the array end face of the detector through the existing collimator, the perpendicularity of the ray beam and the array end face of the detector is difficult to ensure, and the phenomenon can influence the measurement result of the crosstalk degree of the detector.
Accordingly, the prior art is still in need of improvement.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a collimation device for auxiliary detector pixel array crosstalk degree test, which aims to solve the problems that the collimation slotted holes of the existing collimator are formed by splicing two plates, the spliced collimation slotted holes are rough, and the size and shape accuracy of ray bundles emitted by a ray source are low after the ray bundles pass through the collimation slotted holes; moreover, the conventional collimator generally has the problem that the collimator can only move and cannot deflect.
In order to solve the above technical problems, an embodiment of the present utility model provides a collimation device for auxiliary detector pixel array crosstalk degree test, including:
a base support;
the Z-axis rotating mechanism is arranged on the base support frame, and the driving end of the Z-axis rotating mechanism rotates around the Z axis relative to the base support frame;
the Y-axis deflection assembly is arranged on the Z-axis rotation mechanism, and the driving end of the Y-axis deflection assembly rotates around the Y axis relative to the Z-axis rotation mechanism;
the X-axis deflection assembly is arranged on the Y-axis deflection assembly, and the driving end of the X-axis deflection assembly rotates around the X axis relative to the Y-axis deflection assembly;
the ray baffle is arranged on the X-axis deflection assembly, and a wire hole and a round hole are formed in the ray baffle.
In one implementation, the collimation device further includes a Z-axis movement mechanism, an X-axis movement mechanism, and a Y-axis movement assembly;
the Z-axis moving mechanism is arranged on the base support frame, and the driving end of the Z-axis moving mechanism moves along the Z axis relative to the base support frame; the X-axis moving mechanism is arranged on the Z-axis moving mechanism, and the driving end of the X-axis moving mechanism moves along the X-axis relative to the Z-axis moving mechanism; the Z-axis rotating mechanism is arranged on the X-axis moving mechanism, the driving end of the Z-axis rotating mechanism rotates around the Z axis relative to the X-axis moving mechanism, the Y-axis moving assembly is arranged on the Z-axis rotating mechanism, the driving end of the Y-axis moving assembly moves along the Y axis relative to the Z-axis rotating mechanism, the Y-axis deflecting assembly is arranged on the Y-axis moving assembly, and the driving end of the Y-axis deflecting assembly rotates around the Y axis relative to the Y-axis moving assembly.
In one implementation, the Z-axis moving mechanism comprises a first screw motor, a first nut seat and a Z-axis moving plate, wherein the fixed end of the first screw motor is arranged on the base support frame, a mounting plate is arranged above the Z-axis moving plate on the base support frame, the screw driving end of the first screw motor is rotationally arranged on the mounting plate, the first nut seat is arranged on the screw driving end of the first screw motor, and the Z-axis moving plate is fixedly arranged on the first nut seat.
In one implementation, the collimation device further comprises a Z-axis guide assembly, the Z-axis guide assembly comprises a plurality of Z-axis guide rods, first guide holes matched with the Z-axis guide rods are formed in the mounting plate, one ends of the Z-axis guide rods are fixedly arranged on the Z-axis moving plate, and the other ends of the Z-axis guide rods penetrate through the first guide holes and are connected with the X-axis moving mechanism.
In one implementation, the collimation device further comprises an X-axis guiding assembly, the X-axis guiding assembly comprises an X-axis guiding supporting plate, two sliding rails and two sliding blocks, the X-axis guiding supporting plate is arranged on the Z-axis moving mechanism, the two sliding rails are respectively arranged on two sides of the X-axis guiding supporting plate, the two sliding blocks are respectively arranged on the two sliding rails, and the driving end of the X-axis moving mechanism is arranged on the sliding blocks.
In one implementation, the X-axis moving mechanism includes a second screw motor, a second nut seat and an X-axis moving plate, where the fixed end of the second screw motor is disposed on the X-axis guiding support plate, the screw driving end of the second screw motor is rotationally disposed on the X-axis guiding support plate, the second nut seat is disposed on the screw driving end of the second screw motor, and the X-axis moving plate is fixedly connected with the second nut seat and is disposed on the slider.
In one implementation, the Y-axis moving assembly includes a Y-axis hierarchical adjusting seat and a set of first fastening screws, where a plurality of sets of first fastening holes matched with the first fastening screws are sequentially formed on the Y-axis hierarchical adjusting seat along the Y-axis moving direction, and the first fastening screws pass through one set of the first fastening holes and fix the Y-axis hierarchical adjusting seat on the Z-axis rotating mechanism.
In one implementation, the Y-axis deflection assembly includes a Y-axis rotating plate, two first adjusting screws and two second set screws, the Y-axis rotating plate is disposed below the Y-axis stepped adjusting seat, the two first adjusting screws are respectively disposed on two sides of a top surface of the Y-axis stepped adjusting seat, the first adjusting screws pass through the Y-axis stepped adjusting seat and are abutted to an end surface of the Y-axis rotating plate, first kidney-shaped holes are respectively formed on two sides of the Y-axis rotating plate in a penetrating manner around the Y-axis rotating direction, and the two second set screws sequentially pass through the Y-axis stepped adjusting seat and the first kidney-shaped holes and fix the Y-axis rotating plate on the Y-axis stepped adjusting seat.
In one implementation, the mounting groove is formed in the Y-axis rotating plate, the ray baffle is arranged in the mounting groove, the Y-axis rotating plate is positioned on the mounting groove and sequentially provided with two groups of screw holes around the X-axis rotating direction, the X-axis deflection assembly comprises two third set screws and two groups of second adjusting screws matched with the screw holes, the second adjusting screws sequentially penetrate through the Y-axis grading adjusting seat and the screw holes and are propped against the ray baffle, the two sides of the ray baffle are respectively penetrated with second kidney-shaped holes around the X-axis rotating direction, and the two third set screws sequentially penetrate through the Y-axis grading adjusting seat, the Y-axis rotating plate and the first kidney-shaped holes and fix the ray baffle on the Y-axis rotating plate.
In one implementation mode, a plurality of wire holes are formed in the ray baffle plate, and the sizes of all the wire holes are different; the round holes on the ray baffle are provided with a plurality of round holes, and the sizes of all the round holes are different.
The beneficial effects are that: according to the utility model, the Z-axis rotating mechanism, the Y-axis deflecting mechanism and the X-axis deflecting mechanism are arranged, the ray baffle is arranged on the X-axis deflecting mechanism, the X-axis deflecting mechanism is arranged on the Y-axis deflecting mechanism, and the Y-axis deflecting mechanism is arranged on the Z-axis rotating mechanism, so that the ray baffle can deflect along the Z-axis, the Y-axis and the X-axis respectively under the action of the Z-axis rotating mechanism, the Y-axis deflecting mechanism and the X-axis deflecting mechanism, the problem that the perpendicularity of the ray beam entering the end face of the detector array is difficult to ensure due to incapability of deflecting the traditional collimator is solved, and the ray hole and the round hole are formed in the ray baffle, so that narrow linear or dot ray beams can be respectively provided for the end face of the detector array.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without creative effort for a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of a front view structure of a collimation device for auxiliary detector pixel array crosstalk degree test.
Fig. 2 is a schematic side view structure of a collimation device for auxiliary detector pixel array crosstalk degree test.
Fig. 3 is a schematic structural diagram of an X-axis moving mechanism in a collimation device for auxiliary detector pixel array crosstalk degree test.
Fig. 4 is a schematic view of the structure of fig. 3 with the X-axis guide support plate removed.
Fig. 5 is a schematic diagram of a connection structure of a Y-axis rotating plate, a Y-axis hierarchical adjusting seat and a ray baffle in a collimation device for auxiliary detector pixel array crosstalk degree test provided by the utility model.
Fig. 6 is a schematic diagram of a connection structure between a Y-axis rotating plate and a Y-axis hierarchical adjusting seat in a collimation device for auxiliary detector pixel array crosstalk degree test.
Fig. 7 is a schematic structural diagram of a Y-axis hierarchical adjustment seat in a collimation device for auxiliary detector pixel array crosstalk degree test.
Fig. 8 is a schematic structural diagram of a Y-axis rotating plate in a collimation device for auxiliary detector pixel array crosstalk degree test.
Fig. 9 is a schematic structural diagram of a ray baffle in a collimation device for auxiliary detector pixel array crosstalk degree test.
In the figure: 1. a base support; 11. a base; 12. a mounting plate; 13. a support frame; 2. a Z-axis rotating mechanism; 3. a Y-axis deflection mechanism; 31. a Y-axis rotating plate; 311. a first kidney-shaped aperture; 312. a mounting groove; 313. screw holes; 314. a cylindrical hole; 32. a first adjusting screw; 4. an X-axis deflection mechanism; 41. a second adjusting screw; 5. a ray baffle; 51. a wire hole; 52. a round hole; 53. a second kidney-shaped aperture; 6. a Z-axis moving mechanism; 61. a first lead screw motor; 62. a first nut seat; 63. a Z-axis moving plate; 7. a Z-axis guide assembly; 8. an X-axis moving mechanism; 81. a second screw motor; 82. a second nut seat; 83. an X-axis moving plate; 9. an X-axis guide assembly; 91. an X-axis guide support plate; 911. a second bearing seat; 92. a slide rail; 93. a slide block; 10. a Y-axis moving assembly; 101. y-axis graded adjusting seats; 1011. a first fixing hole; 1012. cylindrical protrusions.
Detailed Description
The utility model provides a collimation device for auxiliary detector pixel array crosstalk degree test, which is used for making the purpose, technical scheme and effect of the utility model clearer and more definite, and the utility model is further described in detail below by referring to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The application will be further described by the description of embodiments with reference to the accompanying drawings.
Referring to fig. 1, 2, 6 and 9, the embodiment provides a collimation device for testing crosstalk of an auxiliary detector pixel array, the collimation device comprises a base support 131, a Z-axis rotating mechanism 2, a Y-axis deflecting mechanism 3, an X-axis deflecting mechanism 4 and a ray baffle 5, the Z-axis rotating mechanism 2 is arranged on the base support 131, a driving end of the Z-axis rotating mechanism 2 rotates around the Z-axis relative to the base support 131, the Y-axis deflecting assembly is arranged on the Z-axis rotating mechanism 2, a driving end of the Y-axis deflecting assembly rotates around the Y-axis relative to the Z-axis rotating mechanism 2, the X-axis deflecting assembly is arranged on the Y-axis deflecting assembly, a driving end of the X-axis deflecting assembly rotates around the X-axis relative to the Y-axis deflecting assembly, the ray baffle 5 is arranged on a driving end of the X-axis deflecting assembly, and a wire hole 51 and a round hole 52 are formed in the ray baffle 5;
according to the embodiment, the Z-axis rotating mechanism 2, the Y-axis deflecting mechanism 3 and the X-axis deflecting mechanism 4 are arranged, the ray baffle 5 is arranged on the X-axis deflecting mechanism 4, the X-axis deflecting mechanism 4 is arranged on the Y-axis deflecting mechanism 3, and the Y-axis deflecting mechanism 3 is arranged on the Z-axis rotating mechanism 2, so that the ray baffle 5 can deflect along the Z-axis, the Y-axis and the X-axis respectively under the action of the Z-axis rotating mechanism 2, the Y-axis deflecting mechanism 3 and the X-axis deflecting mechanism 4, the problem that the perpendicularity of a ray bundle entering the end face of a detector array is difficult to ensure due to incapacity of deflection of a traditional collimator is solved, in addition, the ray holes 51 and the round holes 52 are formed in the ray baffle 5, narrow-line or dot-shaped ray bundles can be respectively provided for the end face of the detector array, the ray holes 51 and the round holes 52 are not formed in a splicing mode of two plates, high-precision and angle-adjustable ray bundles can be provided for the crosstalk degree test of the detector, and the accuracy of the crosstalk degree test result of the detector is improved.
Referring to fig. 1, 2, 4 and 6, in one embodiment, the collimating device further includes a Z-axis moving mechanism 6, a Z-axis guiding assembly 7, an X-axis moving mechanism 8, an X-axis guiding assembly 9 and a Y-axis moving assembly 10, the Z-axis moving mechanism 6 is disposed on the base support 131, the driving end of the Z-axis moving mechanism 6 moves along the Z-axis relative to the base support 131, the Z-axis guiding assembly 7 is disposed above the Z-axis moving mechanism 6 on the base support 131, the X-axis guiding assembly 9 is disposed on the Z-axis moving mechanism 6, the X-axis moving mechanism 8 is disposed on the X-axis guiding assembly 9, the driving end of the X-axis moving mechanism 8 moves along the X-axis relative to the X-axis guiding assembly 9, the Z-axis rotating mechanism 2 is disposed on the X-axis moving mechanism 8, the driving end of the Z-axis rotating mechanism 2 rotates around the Z-axis relative to the X-axis moving mechanism 8, the Y-axis moving assembly 10 is disposed on the Z-axis rotating mechanism 2 and the driving end of the Y-axis rotating mechanism 10 rotates around the Y-axis rotating assembly 10.
Referring to fig. 1 and 2, in one embodiment, the base support 131 includes a base 11, a mounting plate 12, and a plurality of support frames 13, a plurality of support frames 13 are disposed on the base 11, the mounting plate 12 is disposed on the support frames 13 and is located above the base 11, the Z-axis moving mechanism 6 includes a first screw motor 61, a first nut seat 62, and a Z-axis moving plate 63, a fixed end of the first screw motor 61 is disposed on the base 11, a first bearing seat (not shown in the drawing) is disposed on the mounting plate 12, a screw driving end of the first screw motor 61 is disposed in the first bearing seat, the first nut seat 62 is in threaded connection with a screw driving end of the first screw motor 61, a plurality of yielding holes located on the support frames 13 are formed on the Z-axis moving plate 63, one end of the support frame 13 far from the base 11 passes through the yielding holes and is fixedly connected with the mounting plate 12, and the Z-axis moving plate 63 is fixedly disposed on the first nut seat 62;
in this embodiment, by driving the first screw motor 61, the screw driving end of the first screw motor 61 performs a rotational motion, and drives the first nut seat 62 to move in the Z axis, thereby driving the Z axis moving plate 63 to move.
Referring to fig. 1 and 2, in one embodiment, the Z-axis guiding assembly 7 includes a plurality of Z-axis guiding rods, the mounting plate 12 is provided with a first guiding hole (not shown) that matches the Z-axis guiding rods, one end of the Z-axis guiding rod is fixedly disposed on the Z-axis moving plate 63, and the other end of the Z-axis guiding rod passes through the first guiding hole and is connected to the X-axis moving mechanism 8;
this embodiment is through setting up the Z axle guide bar to set up first guiding hole on mounting panel 12 the lead screw drive end of first lead screw motor 61 drives Z axle movable plate 63 can play the guide effect for Z axle movable plate 63's Z axle is removed when the Z axle removes, thereby avoids Z axle movable plate 63 skew Z axle removes, thereby guarantees that ray baffle 5 on Z axle movable plate 63 can accurately remove at the Z axle, thereby can guarantee the straightness that hangs down of ray bundle injection detector array terminal surface, and then promotes the accuracy of detector crosstalk degree test result.
Referring to fig. 1, 3 and 4, in one embodiment, the X-axis guiding assembly 9 includes an X-axis guiding supporting plate 91, two sliding rails 92 and two sliding blocks 93, the X-axis guiding supporting plate 91 is disposed on the Z-axis guiding rod, two sliding rails 92 are respectively disposed on two sides of the X-axis guiding supporting plate 91, two sliding blocks 93 are respectively disposed on two sliding rails 92, and the driving end of the X-axis moving mechanism 8 is disposed on the sliding blocks 93;
according to the embodiment, the X-axis guide supporting plate 91 is arranged, the sliding rail 92 and the sliding block 93 are arranged on the X-axis guide supporting plate 91, and the X-axis moving mechanism 8 is arranged on the sliding block 93, so that the driving end of the X-axis moving mechanism 8 can move in the X-axis more accurately through the guiding of the sliding rail 92, the perpendicularity of the ray bundle incident on the end face of the detector array can be guaranteed, and the accuracy of the crosstalk degree test result of the detector is improved.
Referring to fig. 3 and 4, in one embodiment, the X-axis moving mechanism 8 includes a second screw motor 81, a second nut seat 82, and an X-axis moving plate 83, where a fixed end of the second screw motor 81 is disposed on the X-axis guiding support plate 91, a screw driving end of the second screw motor 81 is rotatably disposed on the X-axis guiding support plate 91, a second bearing seat 911 is disposed on the X-axis guiding support plate 91, a screw driving end of the second screw motor 81 is disposed in the second bearing seat 911, the second nut seat 82 is screwed on a screw driving end of the second screw motor 81, and the X-axis moving plate 83 is fixedly connected with the second nut seat 82 and is disposed on the slider 93;
in this embodiment, the second screw motor 81 is driven, and the screw driving end of the second screw motor 81 performs a rotary motion, and drives the second nut seat 82 to move along the X axis, so as to drive the X axis moving plate 83 to move.
Referring to fig. 1 and 2, in one embodiment, the Z-axis rotating mechanism 2 includes an electric rotating table fixedly disposed on the X-axis moving plate 83, and the electric rotating table rotates around the Z-axis relative to the X-axis moving plate 83.
Referring to fig. 6, in one embodiment, the Y-axis moving assembly 10 includes a Y-axis stepped adjustment seat 101 and a set of first fastening screws (not shown in the drawing), wherein a plurality of sets of first fastening holes 1011 matching with the first fastening screws are sequentially formed in the Y-axis stepped adjustment seat 101 along the Y-axis moving direction, a set of second fastening holes (not shown in the drawing) matching with the first fastening screws are formed in the electric rotating table, and the first fastening screws pass through one set of the first fastening holes 1011 and fasten the first fastening screws in the second fastening holes, so as to fix the Y-axis stepped adjustment seat 101 on the Z-axis rotating mechanism 2;
in this embodiment, by providing a plurality of groups of first fixing holes 1011 and adjusting the assembly of the first fixing holes 1011 of different groups and the second fixing holes of the Z-axis rotating mechanism 2, the position of the Y-axis hierarchical adjusting seat 101 in the Y-axis direction of the Z-axis rotating mechanism 2 can be adjusted, so as to realize the Y-axis movement of the Y-axis hierarchical adjusting seat 101.
Referring to fig. 7 and 8, in one embodiment, the Y-axis deflection assembly includes a Y-axis rotating plate 31, two first adjusting screws 32 and two second fixing screws (not shown in the drawings), a cylindrical protrusion 1012 is disposed on one side of the Y-axis hierarchical adjusting seat 101, a cylindrical hole 314 matched with the cylindrical protrusion 1012 is formed on the Y-axis rotating plate 31 in a penetrating manner, the Y-axis rotating plate 31 is suspended on the cylindrical protrusion 1012 through the cylindrical hole 314 to be disposed below the Y-axis hierarchical adjusting seat 101, the two first adjusting screws 32 are respectively disposed on two sides of a top surface of the Y-axis hierarchical adjusting seat 101, the first adjusting screws 32 penetrate through the Y-axis hierarchical adjusting seat 101 and are abutted against an end surface of the Y-axis rotating plate 31, a first waist-shaped hole 311 is formed on two sides of the Y-axis rotating plate 31 in a penetrating manner along a Y-axis rotating direction, and the two second fixing screws sequentially penetrate through the Y-axis hierarchical adjusting seat 101 and the first waist-shaped hole 311 and fix the Y-axis rotating plate 31 on the Y-axis hierarchical adjusting seat 101;
the deflection adjustment of the Y-axis deflection assembly in this embodiment is specifically: when the Y-axis rotating plate 31 needs to be tilted to one side of the Y-axis, for example, the two first adjusting screws 32 are named as an a-screw and a B-screw, if the Y-axis rotating plate 31 needs to be rotated to tilt to the a-screw direction, that is, the a-screw direction of the Y-axis rotating plate 31 is lower than the B-screw direction, the B-screw is first turned upward to move the B-screw upward, however, the a-screw is turned downward to move the a-screw downward, one end of the a-screw abutting against the Y-axis rotating plate 31 deflects to the a-screw direction along with the downward movement of the a-screw, and of course, when the Y-axis rotating plate 31 is deflected to the a-screw direction, the a-screw can be reversely turned and fine-tuned by the B-screw, it can be understood that the Y-axis rotating plate rotates around the Y-axis no matter in which direction the a-screw direction or the B-screw direction is deflected, and when the adjustment is completed, the second fixing screw sequentially passes through the Y-axis stepped adjusting seat 101 and the first kidney-shaped hole 311 and fixes the Y-axis rotating plate 31 to the Y-axis rotating plate 101 to the Y-axis rotating seat 101.
Referring to fig. 6, 7, 8 and 9, in one embodiment, the Y-axis rotating plate 31 is provided with a mounting groove 312, the ray baffle 5 is disposed in the mounting groove 312, the Y-axis rotating plate 31 is located in the mounting groove 312 and sequentially provided with two groups of screw holes 313 around the X-axis rotation direction, the X-axis deflection assembly includes two third fastening screws (not shown) and two groups of second adjusting screws 41 matched with the screw holes 313, the second adjusting screws 41 sequentially pass through the Y-axis stepped adjusting seat 101 and the screw holes 313 and are abutted against the ray baffle 5, two sides of the ray baffle 5 are respectively provided with second kidney-shaped holes 53 around the X-axis rotation direction, and the two third fastening screws sequentially pass through the Y-axis stepped adjusting seat 101, the Y-axis rotating plate 31 and the first kidney-shaped holes 311 and fix the ray baffle 5 on the Y-axis rotating plate 31;
the deflection adjustment of the X-axis deflection assembly in this embodiment is specifically: two groups of second adjusting screws 41 can be turned respectively, and the two groups of second adjusting screws 41 protrude out of the Y-axis rotating plate 31 according to different protruding degrees, for example, the two groups of second adjusting screws 41 are named as a C screw group and a D screw group respectively, when the ray baffle 5 needs to be rotated to incline towards the direction of the C screw group, the C screw group is turned to the direction close to the ray baffle 5, the protruding degree of the C screw group out of the Y-axis rotating plate 31 is larger than the protruding degree of the D screw group out of the Y-axis rotating plate 31, and therefore the ray baffle 5 is inclined towards the direction of the C screw group; when the ray baffle 5 is required to be rotated to incline towards the direction of the D screw set, the D screw set knob is rotated to the direction close to the ray baffle 5, the degree that the C screw set protrudes out of the Y-axis rotating plate 31 is smaller than the degree that the D screw set protrudes out of the Y-axis rotating plate 31, so that the ray baffle 5 is inclined towards the direction of the D screw set, and it can be understood that no matter the ray baffle 5 is inclined towards the direction of the C screw set or the direction of the D screw set, the direction of the X-axis rotation is the direction, and when the adjustment is finished, a third set screw sequentially passes through the Y-axis stepped adjusting seat 101, the Y-axis rotating plate 31 and the first kidney-shaped hole 311, and the ray baffle 5 is fixed on the Y-axis rotating plate 31, so that the X-axis deflection of the ray baffle 5 is completed.
It should be noted that, in this embodiment, the Z-axis rotating mechanism 2, the Y-axis deflecting assembly, the X-axis deflecting assembly, the Z-axis moving mechanism 6, the X-axis moving mechanism 8, and the Y-axis moving assembly 10 are all provided for urging the radiation shield 5 thereon to move and rotate.
Referring to fig. 9, in one embodiment, a plurality of wire holes 51 are formed in the radiation shield 5, and all the wire holes 51 are different in size; the round holes 52 on the ray baffle 5 are provided with a plurality of round holes 52, and the sizes of all the round holes 52 are different, and in this embodiment, the application range of the ray baffle 5 in this embodiment can be improved by arranging the wire holes 51 and the round holes 52 with different sizes on the ray baffle 5.
In summary, the present utility model provides a collimation device for auxiliary detector pixel array crosstalk testing, the collimation device includes a base support 131, a Z-axis rotating mechanism 2, a Y-axis deflecting mechanism 3, an X-axis deflecting mechanism 4 and a ray baffle 5, the Z-axis rotating mechanism 2 is disposed on the base support 131, a driving end of the Z-axis rotating mechanism 2 rotates around a Z-axis relative to the base support 131, a Y-axis deflecting assembly is disposed on the Z-axis rotating mechanism 2, a driving end of the Y-axis deflecting assembly rotates around a Y-axis relative to the Z-axis rotating mechanism 2, an X-axis deflecting assembly is disposed on the Y-axis deflecting assembly, a driving end of the X-axis deflecting assembly rotates around an X-axis relative to the Y-axis deflecting assembly, the ray baffle 5 is disposed on the X-axis deflecting assembly, and a wire hole 51 and a round hole 52 are formed in the ray baffle 5; according to the utility model, the Z-axis rotating mechanism 2, the Y-axis deflecting mechanism 3 and the X-axis deflecting mechanism 4 are arranged, the ray baffle 5 is arranged on the X-axis deflecting mechanism 4, the X-axis deflecting mechanism 4 is arranged on the Y-axis deflecting mechanism 3, and the Y-axis deflecting mechanism 3 is arranged on the Z-axis rotating mechanism 2, so that the ray baffle 5 can deflect along the Z-axis, the Y-axis and the X-axis respectively under the action of the Z-axis rotating mechanism 2, the Y-axis deflecting mechanism 3 and the X-axis deflecting mechanism 4, the problem that the perpendicularity of a ray bundle entering the end face of a detector array is difficult to ensure due to the fact that a traditional collimator cannot deflect is solved, and the ray hole 51 and the round hole 52 are formed in the ray baffle 5 and can respectively provide a narrow linear or dot ray bundle for the end face of the detector array, the ray hole 51 and the round hole 52 in the embodiment are not formed in a splicing manner through two plates, the ray bundle crosstalk degree test of the detector is high in precision and the angle-adjustable, and the accuracy of the cross-talk test result of the detector is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A collimation device for assisting in crosstalk testing of a detector pixel array, comprising:
a base support;
the Z-axis rotating mechanism is arranged on the base support frame, and the driving end of the Z-axis rotating mechanism rotates around the Z axis relative to the base support frame;
the Y-axis deflection assembly is arranged on the Z-axis rotation mechanism, and the driving end of the Y-axis deflection assembly rotates around the Y axis relative to the Z-axis rotation mechanism;
the X-axis deflection assembly is arranged on the Y-axis deflection assembly, and the driving end of the X-axis deflection assembly rotates around the X axis relative to the Y-axis deflection assembly;
the ray baffle is arranged on the X-axis deflection assembly, and a wire hole and a round hole are formed in the ray baffle.
2. The alignment device for assisting detector pixel array crosstalk testing according to claim 1, further comprising a Z-axis movement mechanism, an X-axis movement mechanism, and a Y-axis movement assembly;
the Z-axis moving mechanism is arranged on the base support frame, and the driving end of the Z-axis moving mechanism moves along the Z axis relative to the base support frame; the X-axis moving mechanism is arranged on the Z-axis moving mechanism, and the driving end of the X-axis moving mechanism moves along the X-axis relative to the Z-axis moving mechanism; the Z-axis rotating mechanism is arranged on the X-axis moving mechanism, the driving end of the Z-axis rotating mechanism rotates around the Z axis relative to the X-axis moving mechanism, the Y-axis moving assembly is arranged on the Z-axis rotating mechanism, the driving end of the Y-axis moving assembly moves along the Y axis relative to the Z-axis rotating mechanism, the Y-axis deflecting assembly is arranged on the Y-axis moving assembly, and the driving end of the Y-axis deflecting assembly rotates around the Y axis relative to the Y-axis moving assembly.
3. The collimation device for testing the crosstalk degree of the pixel array of the auxiliary detector according to claim 2, wherein the Z-axis moving mechanism comprises a first screw motor, a first nut seat and a Z-axis moving plate, a fixed end of the first screw motor is arranged on the base support frame, a mounting plate is arranged above the Z-axis moving plate on the base support frame, a screw driving end of the first screw motor is rotatably arranged on the mounting plate, the first nut seat is arranged on a screw driving end of the first screw motor, and the Z-axis moving plate is fixedly arranged on the first nut seat.
4. The collimating device for testing crosstalk of a pixel array of an auxiliary detector according to claim 3, further comprising a Z-axis guiding assembly, wherein the Z-axis guiding assembly comprises a plurality of Z-axis guiding rods, a first guiding hole matched with the Z-axis guiding rods is formed in the mounting plate, one end of the Z-axis guiding rod is fixedly arranged on the Z-axis moving plate, and the other end of the Z-axis guiding rod penetrates through the first guiding hole and is connected with the X-axis moving mechanism.
5. The collimation device for testing the crosstalk degree of the pixel array of the auxiliary detector according to claim 2, further comprising an X-axis guiding assembly, wherein the X-axis guiding assembly comprises an X-axis guiding supporting plate, two sliding rails and two sliding blocks, the X-axis guiding supporting plate is arranged on the Z-axis moving mechanism, the two sliding rails are respectively arranged on two sides of the X-axis guiding supporting plate, the two sliding blocks are respectively arranged on the two sliding rails, and the driving end of the X-axis moving mechanism is arranged on the sliding blocks.
6. The alignment device for testing crosstalk of a pixel array of an auxiliary detector according to claim 5, wherein the X-axis moving mechanism comprises a second screw motor, a second nut seat and an X-axis moving plate, a fixed end of the second screw motor is disposed on the X-axis guiding support plate, a screw driving end of the second screw motor is rotatably disposed on the X-axis guiding support plate, the second nut seat is disposed on a screw driving end of the second screw motor, and the X-axis moving plate is fixedly connected with the second nut seat and is disposed on the slider.
7. The collimation device for auxiliary detector pixel array crosstalk degree test according to claim 2, wherein the Y-axis moving assembly comprises a Y-axis graded adjusting seat and a set of first set screws, a plurality of sets of first fixing holes matched with the first set screws are sequentially formed in the Y-axis graded adjusting seat along the Y-axis moving direction, the first set screws penetrate through one set of the first fixing holes, and the Y-axis graded adjusting seat is fixedly arranged on the Z-axis rotating mechanism.
8. The alignment device for testing crosstalk of a pixel array of an auxiliary detector according to claim 7, wherein the Y-axis deflection assembly comprises a Y-axis rotating plate, two first adjusting screws and two second set screws, the Y-axis rotating plate is arranged below the Y-axis graded adjusting seat, the two first adjusting screws are respectively arranged at two sides of the top surface of the Y-axis graded adjusting seat, the first adjusting screws penetrate through the Y-axis graded adjusting seat and are abutted against the end surface of the Y-axis rotating plate, first kidney-shaped holes are respectively formed in two sides of the Y-axis rotating plate in a penetrating manner around the Y-axis rotating direction, and the two second set screws sequentially penetrate through the Y-axis graded adjusting seat and the first kidney-shaped holes and fix the Y-axis rotating plate on the Y-axis graded adjusting seat.
9. The collimation device for testing the crosstalk degree of the pixel array of the auxiliary detector according to claim 8, wherein a mounting groove is formed in the Y-axis rotating plate, the ray baffle is arranged in the mounting groove, two groups of screw holes are sequentially formed in the Y-axis rotating plate on the mounting groove around the X-axis rotating direction, the X-axis deflection assembly comprises two third set screws and two groups of second set screws matched with the screw holes, the second set screws sequentially penetrate through the Y-axis grading adjusting seat and the screw holes and abut against the ray baffle, second kidney-shaped holes are respectively formed in two sides of the ray baffle around the X-axis rotating direction in a penetrating mode, and the two third set screws sequentially penetrate through the Y-axis grading adjusting seat, the Y-axis rotating plate and the first kidney-shaped holes and fix the ray baffle on the Y-axis rotating plate.
10. The collimation device for auxiliary detector pixel array crosstalk degree test according to claim 1, wherein a plurality of line holes are arranged on the ray baffle plate, and the sizes of all the line holes are different; the round holes on the ray baffle are provided with a plurality of round holes, and the sizes of all the round holes are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320889189.9U CN219936688U (en) | 2023-04-18 | 2023-04-18 | Collimation device for auxiliary detector pixel array crosstalk degree test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320889189.9U CN219936688U (en) | 2023-04-18 | 2023-04-18 | Collimation device for auxiliary detector pixel array crosstalk degree test |
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| CN219936688U true CN219936688U (en) | 2023-10-31 |
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| CN202320889189.9U Active CN219936688U (en) | 2023-04-18 | 2023-04-18 | Collimation device for auxiliary detector pixel array crosstalk degree test |
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| Country | Link |
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