CN217510508U - Beam limiter fan blade movement detection device and beam limiter - Google Patents
Beam limiter fan blade movement detection device and beam limiter Download PDFInfo
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- CN217510508U CN217510508U CN202220768286.8U CN202220768286U CN217510508U CN 217510508 U CN217510508 U CN 217510508U CN 202220768286 U CN202220768286 U CN 202220768286U CN 217510508 U CN217510508 U CN 217510508U
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Abstract
The application relates to a limit ware flabellum motion detection device and limit ware, wherein limit ware flabellum motion detection device includes: the fan blade is arranged at the opening part in an openable and closable manner; the base plate is connected with crossed racks, a driving gear is connected between the crossed racks, the driving gear is installed on the direct current motor, the fan blades are connected to the crossed racks, and the fan blades are connected with a linear displacement sensor used for detecting the moving position of the linear displacement sensor. The openable fan blades are arranged at the opening part of the substrate, so that the radiation range of the X-ray beam irradiated on the flat panel detector can be adjusted by controlling the opening and closing positions of the fan blades. The combination is with flabellum connection on the crossing rack to with crossing between the rack connection and the drive gear, can guarantee the uniformity that the flabellum opened and shut the action, drive gear installs on DC motor, compares in step motor control pulse's form, can avoid appearing the pulse and lose the phenomenon, has strengthened the gliding nature of flabellum motion.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a fan blade movement detection device of a beam limiter and the beam limiter.
Background
The beam limiter is a device used for limiting the radiation range of an X-ray beam to a flat panel detector in X-ray equipment, and the beam limiter can continuously, smoothly and accurately adjust the radiation field with any size by opening and closing fan blades within a specified adjustment range.
The existing automatic beam limiter is mostly controlled by a stepping motor, the pulse number is calculated by a program by utilizing a pulse control mode of the stepping motor, and the revolution of the stepping motor is controlled to realize the position positioning of fan blades.
Due to the characteristic that the stepping motor controls the pulse, the phenomenon of pulse loss can often occur, so that the problems of unsmooth movement of the fan blades, inaccurate position positioning and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a limit ware flabellum motion detection device and limit ware can accurately detect the position that opens and shuts of limit ware flabellum, realizes the accurate positioning of flabellum when making the flabellum smooth motion.
In order to achieve the above object, in a first aspect, the present invention provides a device for detecting the movement of fan blades of a beam limiter, comprising: the fan blade is arranged at the position of the opening in an openable and closable manner;
the fan blade is characterized in that cross racks are connected to the substrate, a driving gear is connected between the cross racks, the driving gear is installed on the direct current motor, the fan blades are connected to the cross racks, and the fan blades are connected with linear displacement sensors used for detecting the moving positions of the linear displacement sensors.
In an optional embodiment, the crossed rack comprises two racks, the racks are arranged in a staggered manner relative to the driving gear, each rack is connected with a switching block, the switching blocks are arranged on two sides of the driving gear, and the fan blades are connected with the switching blocks.
In an alternative embodiment, both of the racks are connected to the driving gear in a meshed manner, and the driving gear is connected to an output shaft of the direct current motor.
In an alternative embodiment, the driving gear is a cylindrical gear, and the length of the cylindrical gear is not less than the overlapped thickness of the racks.
In an alternative embodiment, a guide groove is connected to the other side of the base plate opposite to the crossed rack, and the side edge of the fan blade far away from the switching block is accommodated in the guide groove.
In an optional implementation manner, the two fan blades are oppositely arranged, the linear displacement sensor comprises a fixed seat and an expansion link, the tail end of the expansion link is connected with a moving block, and the moving block is connected with one of the fan blades.
In an alternative embodiment, the fan blades are disposed on two side surfaces of the base plate, and the cross rack, the driving gear and the linear displacement sensor include two sets disposed respectively.
In an alternative embodiment, the cross-spline on one side of the base plate extends along the length of the base plate and the cross-spline on the other side of the base plate extends along the width of the base plate.
In an optional embodiment, two side surfaces of the substrate are further respectively provided with an optical coupling switch, and the optical coupling switches are arranged at the end parts of the guide grooves.
In a second aspect, the present invention provides a beam limiter, including any one of the foregoing embodiments, the beam limiter fan blade movement detection device is connected between the ray assembly and the bottom plate through the support column, the bottom plate is provided with an irradiation hole corresponding to the opening.
The openable fan blades are arranged at the opening part of the substrate, so that the radiation range of the X-ray beam irradiated on the flat panel detector can be adjusted by controlling the opening and closing positions of the fan blades. The combination is connected the flabellum on the cross rack to with cross rack connection and between the drive gear, can guarantee the uniformity of flabellum action of opening and shutting, drive gear installs on DC motor, compares in step motor control pulse's form, can avoid appearing the pulse and lose the phenomenon, has strengthened the smooth nature of flabellum motion.
The linear displacement sensor connected with the fan blades can detect the moving position of the fan blades in the opening and closing process in real time, and the accuracy of fan blade positioning is effectively improved.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic view of a fan blade movement detecting device of a beam limiter on one side of a substrate according to the present application;
FIG. 2 is a schematic structural view of the device for detecting the movement of fan blades of a beam limiter on the other side of a substrate according to the present application;
fig. 3 is a schematic structural diagram of a beam limiter in the present application.
Icon:
1-a substrate;
2-fan blades; 21-a guide groove;
3-cross rack; 31-a rack; 32-a transfer block;
4-driving the gear;
5-a direct current motor;
6-linear displacement sensor; 61-a fixed seat; 62-a telescopic rod; 63-a moving block;
7-an optocoupler switch;
8-a filtration layer;
9-a cassette assembly;
10-a base plate;
11-a support post;
12-irradiation hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Referring to fig. 1-2, the present application provides a device for detecting the movement of fan blades of a beam limiter, comprising: the fan blade comprises a base plate 1, wherein an opening is formed in the base plate 1, and fan blades 2 are arranged at the opening in an openable manner;
the base plate 1 is connected with cross racks 3, a driving gear 4 is connected between the cross racks 3, the driving gear 4 is installed on a direct current motor 5, the fan blades 2 are connected on the cross racks 3, and the fan blades 2 are connected with a linear displacement sensor 6 for detecting the moving position of the fan blades.
The utility model provides a beam limiter flabellum motion detection device, the control in the radiation field of vision of mainly used X-ray production apparatus, through the size that opens and shuts of control flabellum 2, the adjustment X-ray bundle passes through 1 upper shed's of base plate scope.
The fan blades 2 comprise two sets capable of opening and closing, the two sets of fan blades 2 can be opened and closed in two mutually perpendicular directions, the opening area of the opening of the substrate 1 is adjusted by controlling the opening and closing size of the two sets of fan blades 2, and therefore the passing range of an X-ray beam on the substrate 1 is adjusted.
The driving assembly and the position detection assembly simultaneously comprise two sets corresponding to the fan blades 2, and the two sets of driving assemblies and the position detection assembly respectively control and detect the opening and closing degrees of the corresponding fan blades 2. Each set of fan blades 2 comprises two sets of fan blades which are oppositely arranged, and the opening and closing actions are realized through the back movement and the opposite movement between the two sets of fan blades 2.
The movement of the two sets of fan blades 2 is controlled simultaneously to enable the fan blades 2 to avoid or shield the opening part of the substrate 1, so that the opening is indirectly opened or closed, and further the movement position of the fan blades 2 is controlled through real-time detection to realize the adjustment of the X-ray beam passing through the opening range.
In order to ensure the movement synchronism of the two fan blades 2 in the opening and closing process of each set of fan blades 2, the base plate 1 is provided with crossed racks 3, a driving gear 4 is connected between the crossed racks 3, and the crossed racks 3 meshed and connected to the driving gear 4 are driven to move towards opposite directions through the rotation of the driving gear 4. The flabellum 2 is connected on the crossed rack 3, can move towards different directions under the drive that crossed rack 3 removed to accomplish the action of opening and shutting of flabellum 2.
Based on current beam limiter adopts step motor control more, leads to losing the further unsmooth problem of flabellum 2 motion of bringing of commentaries on classics because of the step motor pulse is lost easily, the utility model provides a drive gear 4 installs on direct current motor 5, can make drive gear 4's rotation more stable, exports great drive moment simultaneously, driven reliability when reinforcing flabellum 2 removes.
In combination with the above-mentioned movement of the fan blades 2 to adjust the passing range of the X-ray beam on the substrate 1, in order to more accurately adjust the open area of the opening of the substrate 1, the substrate 1 is further provided with the linear displacement sensor 6, and the fan blades 2 are connected to the linear displacement sensor 6, so that the moving position of the fan blades 2 can be detected, and the moving position of the fan blades 2 can be accurately positioned, thereby providing a reference for adjusting the open area of the opening.
In one embodiment, the crossed rack 3 includes two racks 31 moving synchronously, the two racks 31 are arranged in a staggered manner relative to the driving gear 4, specifically, each rack 31 is connected with a switching block 32, the fan blades 2 are connected to the racks 31 through the switching blocks 32, when the driving gear 4 rotates in the same hour hand direction, the two racks 31 arranged in a staggered manner can translate in different directions, the switching blocks 32 connected with the racks 31 are driven to translate in different directions, and then the fan blades 2 connected to the switching blocks 32 move in an opening and closing manner when rotating in different hour hand directions.
The transfer blocks 32 are provided on both sides of the driving gear 4, and can move in opposite directions along a straight line with the driving gear 4 as a center, thereby realizing synchronous movement of the two racks 31, the two transfer blocks 32, and the two fan blades 2.
In order to ensure the synchronous linkage relation of different structures, the two racks 31 are meshed and connected with the driving gear 4, and meanwhile, in order to ensure stable and reliable output of driving torque, the driving gear 4 is connected with an output shaft of the direct current motor 5, so that the transmission efficiency is improved through the arrangement mode, and the power output transfer and the stable and reliable action on the fan blades 2 are enhanced.
The driving gear 4 in this embodiment is a cylindrical gear, the length of the cylindrical gear is not less than the overlapping thickness of the racks 31, specifically, two racks 31 are disposed on two sides of the cylindrical gear in the radial direction, the racks 31 are arranged in an alternating manner in the axial direction of the cylindrical gear, and the extending direction of the racks 31 is perpendicular to the axial direction of the cylindrical gear.
In order to ensure a stable and reliable meshing relationship between the rack 31 and the cylindrical gear, preferably, the length of the cylindrical gear is greater than the staggered overlapping thickness of the two racks 31, and further, a distance is left between each of the two racks 31 and the end surface of the cylindrical gear, so as to ensure that the teeth on the rack 31 are fully meshed on the gear surface of the cylindrical gear.
In another preferred embodiment, a guide slot 21 is connected to the other side of the base plate 1 opposite to the cross rack 3, and the side edge of the fan blade 2 away from the junction block 32 is accommodated in the guide slot 21. Specifically, the guide groove 21 is provided at the side of the opening of the base plate 1, and the cross rack 3 and the drive gear 4 are provided at the other side of the opening. One side of flabellum 2 is connected with switching piece 32, and another side holding can play good guide effect to flabellum 2 in guide slot 21, has further guaranteed the balance of flabellum 2.
Specifically, linear displacement sensor 6 includes fixing base 61 and telescopic link 62, and fixing base 61 fixed connection is on base plate 1, and telescopic link 62 installs inside fixing base 61, and can be relative to fixing base 61 telescopic movement. The tail end of the telescopic rod 62 is connected with a moving block 63, and the moving block 63 is connected with one of the fan blades 2. The fan blade 2 is driven by the driving gear 4 and the rack 31 to move actively, the telescopic rod 62 is driven by the moving block 63 to move telescopically along with the movement of the fan blade 2, the slide rheostat is arranged in the fixed seat 61, and the change of resistance can be converted into a position signal through the change of the telescopic position, so that the moving position of the fan blade 2 can be detected.
Based on the above, the fan blades 2 include two sets disposed at the opening of the base plate 1, and in order to allow the two sets of fan blades 2 to open and close so as to avoid shielding the opening, the two sets of fan blades 2 are disposed on both side surfaces of the base plate 1, and the intersecting rack 3, the driving gear 4, and the linear displacement sensor 6 include two sets disposed respectively. Each set of driving assembly and position detection assembly can respectively control and detect the moving position of the fan blade 2, and the control of the opening area is facilitated. The linear displacement sensor 6 in this embodiment can send the position signal of the fan blade 2 to the control system of the beam limiter, and the control system controls the forward and reverse rotation and start and stop of the dc motor 5 according to the received position signal and by combining with the specific operation of the beam limiter, so as to meet the control requirement of the passing range of the X-ray beam on the substrate 1.
The substrate 1 in this embodiment is rectangular, the opening formed on the substrate 1 is square, the cross rack 3 on one side of the substrate 1 extends along the length direction of the substrate 1, and the cross rack 3 on the other side of the substrate 1 extends along the width direction of the substrate 1. The combination fan blades 2 are arranged at the opening part of the base plate 1, the size of the opening can be adjusted in the opening and closing movement mode of the two sets of fan blades 2, and the shape and the size of the opening area can be adjusted randomly.
The utility model provides a beam limiter is when the start, and flabellum 2 is not in complete closure or open mode, and beam limiter does not have automatic closure or memory function, in order to further realize the position control to flabellum 2, avoids linear displacement sensor 6's telescopic link 62 to take place to hit zero maloperation, prevents the excessive removal of flabellum 2. The optical coupler switches 7 are further mounted on two side faces of the substrate 1 respectively, specifically, the optical coupler switches 7 are arranged at the end portions of the guide grooves 21, before the fan blades 2 reach the zero position, the optical coupler switches 7 are triggered, the direct current motor 5 can be subjected to emergency stop operation through the control system, and the use reliability of the device is guaranteed.
The utility model discloses an adopt direct current motor 5 drive, control is simple, and the operation is stable, and drive moment is big, combines linear displacement sensor 6 to detect the shift position of flabellum 2 to gather flabellum 2's positional parameter in real time through the control system of beam limiter, drive direct current motor 5 makes corresponding motion, realizes flabellum 2's accurate positioning.
With reference to fig. 3, the utility model also provides an X ray beam limiter including above-mentioned beam limiter flabellum motion detection device, beam limiter flabellum motion detection device passes through support post 11 to be connected between ray subassembly and bottom plate 10, is provided with on the bottom plate 10 with the opening corresponding shines hole 12. The radiation assembly specifically comprises a filtering layer 8 and a cassette assembly 9, and when the beam limiter operates, the area of the X-ray beam passing through the substrate 1 is adjusted by controlling the open area of the opening of the substrate 1, so that the X-ray beam finally reaches a radiation position through the radiation hole 12 on the bottom plate 10. The incident range of the X-ray beam can be effectively controlled, and the practical requirements under the actual radiation working condition are met.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A device for detecting the movement of fan blades of a beam limiter is characterized by comprising: the fan blade is arranged at the opening part in an openable and closable manner;
the fan blade is characterized in that cross racks are connected to the substrate, a driving gear is connected between the cross racks, the driving gear is installed on the direct current motor, the fan blades are connected to the cross racks, and the fan blades are connected with linear displacement sensors used for detecting the moving positions of the linear displacement sensors.
2. The device for detecting the movement of the fan blades of the beam limiter according to claim 1, wherein the crossed rack comprises two racks, the racks are arranged in a staggered manner relative to the driving gear, each rack is connected with a switching block, the switching blocks are arranged on two sides of the driving gear, and the fan blades are connected with the switching blocks.
3. The device for detecting the movement of the fan blades of the beam limiter according to claim 2, wherein the two racks are meshed with the driving gear, and the driving gear is connected to an output shaft of the direct current motor.
4. The device for detecting the fan blade movement of the beam limiter according to claim 2, wherein the driving gear is a cylindrical gear, and the length of the cylindrical gear is not less than the overlapping thickness of the rack.
5. The device for detecting the movement of fan blades of a beam limiter according to claim 2, wherein a guide groove is connected to the other side of the base plate opposite to the cross rack, and a side edge of the fan blade is accommodated in the guide groove.
6. The device for detecting the motion of fan blades of a beam limiter according to claim 2, wherein the fan blades comprise two fan blades which are arranged oppositely, the linear displacement sensor comprises a fixed seat and an expansion rod, a moving block is connected to the tail end of the expansion rod, and the moving block is connected with one of the fan blades.
7. The device for detecting the movement of fan blades of a beam limiter according to any one of claims 1 to 6, wherein the fan blades are disposed on both side surfaces of the base plate, and the cross rack, the driving gear and the linear displacement sensor comprise two sets which are disposed respectively.
8. The apparatus of claim 7, wherein the cross-spline on one side of the base plate extends along a length of the base plate and the cross-spline on the other side of the base plate extends along a width of the base plate.
9. The beam limiter fan blade motion detection device as claimed in claim 5, wherein two side surfaces of the substrate are further respectively mounted with an opto-coupler switch, and the opto-coupler switches are disposed at end portions of the guide grooves.
10. A beam limiter comprising the beam limiter fan blade movement detection device as claimed in any one of claims 1 to 9, wherein the beam limiter fan blade movement detection device is connected between a ray assembly and a bottom plate through a support column, and the bottom plate is provided with an irradiation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220768286.8U CN217510508U (en) | 2022-04-01 | 2022-04-01 | Beam limiter fan blade movement detection device and beam limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220768286.8U CN217510508U (en) | 2022-04-01 | 2022-04-01 | Beam limiter fan blade movement detection device and beam limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217510508U true CN217510508U (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220768286.8U Active CN217510508U (en) | 2022-04-01 | 2022-04-01 | Beam limiter fan blade movement detection device and beam limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217510508U (en) |
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- 2022-04-01 CN CN202220768286.8U patent/CN217510508U/en active Active
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