CN205843700U - A kind of multi-leaf raster leaf position and speed detector - Google Patents
A kind of multi-leaf raster leaf position and speed detector Download PDFInfo
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- CN205843700U CN205843700U CN201620029045.6U CN201620029045U CN205843700U CN 205843700 U CN205843700 U CN 205843700U CN 201620029045 U CN201620029045 U CN 201620029045U CN 205843700 U CN205843700 U CN 205843700U
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- blade
- hole
- feed screw
- mounting plate
- leaf
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Abstract
nullThis utility model relates to radiotherapy and the electric multiblade optical grating of other related industries radiant fluxs，More specifically to a kind of multi-leaf raster leaf position and speed detector，Include motor、Shaft coupling、Screw mandrel、Motor mounting plate、Feed screw nut、Blade、Blade guide rail、Magnetic induction head、Magnetic stripe，It is characterized in that: described motor mounting plate is provided with through hole，Described motor is arranged on motor mounting plate through hole sidepiece，Described shaft coupling one end is connected with the output shaft of motor，The other end is connected with screw mandrel，Described screw mandrel passes in through hole，Described feed screw nut is fixed on blade sidepiece，Described screw mandrel one end passes feed screw nut，Described blade is located in blade guide rail，Described magnetic stripe is arranged on blade，Described magnetic induction head is fixed on above magnetic stripe，Compared with prior art，This utility model eliminates cumulative errors、Rational in infrastructure、Improve the accuracy for the treatment of.
Description
Technical field
This utility model relates to radiotherapy and the electric multiblade optical grating of other related industries radiant fluxs, more specifically to a kind of multi-leaf raster leaf position and speed detector.
Background technology
In current radiotherapy field, multi-diaphragm collimator (MLC) is widely used in radiation therapy, and including intensity modulated therapy and conformal therapy, its application target is exactly the injury reducing normal tissue to greatest extent, strengthens the dosage of focus target area as much as possible.For realizing this target, the accuracy of blade location, the Detection & Controling of blade movement speed are just particularly important.Current leaf position detection commonly uses rotary encoder, drives the angular displacement of motor to infer the position of blade by detection, calculates the movement velocity of blade by measuring the rotating speed of motor.In fact, linear motion from the rotary motion of motor to blade, to slow down through gear reduction box, multiple intermediate links such as leading screw and nut mechanism converting motion direction, each intermediate link has different calculating errors and foozle, the accumulation of too much median error, the physical location and the movement velocity that cause blade are difficult to detect exactly, when being embodied in conformal therapy, the resolution of profile is the highest, when intensity modulated therapy, due to blade velocity measure inaccurate, the dose error that may cause target area is bigger than normal.
Therefore, the defect existed for above-mentioned prior art, in fact it is necessary to study, it is provided that a kind of scheme so that leaf position and tachometric survey accurate.
Utility model content
For solving the problems referred to above, the purpose of this utility model is to provide a kind of multi-leaf raster leaf position and speed detector.
For achieving the above object, the technical solution of the utility model is:
A kind of multi-leaf raster leaf position and speed detector, include motor, shaft coupling, screw mandrel, motor mounting plate, feed screw nut, blade, blade guide rail, magnetic induction head, magnetic stripe, it is characterized in that: described motor mounting plate is provided with through hole, described motor is arranged on motor mounting plate through hole sidepiece, described blade is located at motor mounting plate opposite side, described shaft coupling one end is connected with the output shaft of motor, the other end is connected with screw mandrel, described screw mandrel passes through hole, described feed screw nut is fixed on blade sidepiece, described screw mandrel one end passes feed screw nut, described blade is located in blade guide rail, described magnetic stripe is arranged on blade, described magnetic induction head is fixed on above magnetic stripe.
Further, also include bearing insert, bearing, locking nut, described bearing insert is located at outside bearing, described bearing insert and locking nut set in through-holes, described motor is located at bearing side, and described locking nut is located at bearing opposite side, and described screw mandrel passes endoporus and the locking nut of bearing, described bearing insert radius is identical with through hole radius, and described locking nut maximum radius is identical with through hole radius.Make motor output end pass through screw mandrel and reasonably carry out power transmission, rational in infrastructure, thus drive blade movement, and prevent screw mandrel from rocking in through-holes, transmission is stable.
Further, described feed screw nut is fixed on above blade sidepiece, described feed screw nut assumes a " convex " shape, protruding end is arranged towards outside, described feed screw nut center is provided with through hole, described through hole is corresponding with screw mandrel, described feed screw nut side is provided with two fixing posts, described feed screw nut is located at locking nut sidepiece, described motor mounting plate sidepiece is provided with the groove corresponding with feed screw nut's shape, described groove center and through hole center superposition, described motor mounting plate is cuboid.Because feed screw nut sets in a groove so that the distance between motor mounting plate and blade reduces, reduce installation volume.
Further, described blade both sides are vertically located in blade guide rail, described blade guide rail is rectangle or cylindrical, it is provided with guide groove inside described blade guide rail, described blade is located in guide groove, described channel widths is corresponding with blade two ends width, and described blade rail length is less than length of blade.
Further, described magnetic stripe is arranged on blade sidepiece, and described magnetic induction head is vertically located at above magnetic stripe and is located at Leaf Conductance trackside portion, and described magnetic stripe is located in the guide groove of blade guide rail so that detection is accurately.
Further, described vane nose face is provided with three screws, it is divided into screw, middle screw and lower screw, described middle screw is corresponding with the lead to the hole site of motor mounting plate, described screw mandrel is located in middle screw, two fixing posts of described feed screw nut are located in screw and lower screw, fixation.
In this utility model, blade moves back and forth in blade guide rail, and blade, with electromagnetic information, understands this information by magnetic induction head, can directly obtain position and the speed of blade.Compared with prior art, this utility model eliminate cumulative errors, rational in infrastructure, improve the accuracy for the treatment of.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is assembling schematic diagram of the present utility model；
Fig. 3 is magnetic induction header structure schematic diagram.
In figure: 1-motor, 2-shaft coupling, 3-bearing insert, 4-bearing, 5-screw mandrel, 6-motor mounting plate, 7-locking nut, 8-feed screw nut, 9-blade, 10-blade guide rail, 11-magnetic induction head, 12-magnetic stripe
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
In description of the present utility model, it will be appreciated that, term " on ", D score, "front", "rear", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than instruction or the device of hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, is integrally connected, it is also possible to be to removably connect；It can be the connection of two element internals；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood with concrete condition.
Refer to shown in Fig. 1-Fig. 3, a kind of multi-leaf raster leaf position and speed detector, include motor 1, shaft coupling 2, screw mandrel 5, motor mounting plate 6, feed screw nut 8, blade 9, blade guide rail 10, magnetic induction 11, magnetic stripe 12, motor mounting plate 6 is provided with through hole, motor 1 is arranged on motor mounting plate 6 through hole sidepiece, blade 9 is located at motor mounting plate 6 opposite side, shaft coupling one end is connected with the output shaft of motor 1, the other end is connected with screw mandrel 5, screw mandrel 5 is through through hole, feed screw nut 8 is fixed on blade 9 sidepiece, screw mandrel 5 one end passes feed screw nut 8, blade 9 is located in blade guide rail 10, magnetic stripe 12 is arranged on blade 9, magnetic induction 11 is fixed on above magnetic stripe 12.
Also include bearing insert 3, bearing 4, locking nut 7, bearing insert 3 is located at outside bearing 4, bearing insert 3 and locking nut 7 set in through-holes, motor 1 is located at bearing 4 side, locking nut 7 is located at bearing 4 opposite side, screw mandrel 5 passes endoporus and the locking nut 7 of bearing 4, and bearing insert 3 radius is identical with through hole radius, and locking nut 7 maximum radius is identical with through hole radius.
Feed screw nut 8 is fixed on above blade 9 sidepiece, feed screw nut 8 assumes a " convex " shape, protruding end is arranged towards outside, feed screw nut 8 center is provided with through hole, and through hole is corresponding with screw mandrel 5, and feed screw nut 8 side is provided with two fixing posts, feed screw nut 8 is located at locking nut 7 sidepiece, motor mounting plate 6 sidepiece is provided with the groove corresponding with feed screw nut 8 shape, groove center and through hole center superposition, and motor mounting plate 6 is in cuboid.
Blade 9 both sides are vertically located in blade guide rail 10, and blade guide rail 10 is rectangle or cylindrical, is provided with guide groove inside blade guide rail 10, and blade 9 is located in guide groove, and channel widths is corresponding with blade 9 two ends width, and blade guide rail 10 length is less than blade 9 length.
Magnetic stripe 12 is arranged on blade 9 sidepiece, and magnetic induction 11 is vertically located at above magnetic stripe 12 and is located at blade guide rail 10 sidepiece, and magnetic stripe 12 is located in the guide groove of blade guide rail 10.
Blade 9 front end face is provided with three screws, it is divided into screw, middle screw and lower screw, middle screw is corresponding with the lead to the hole site of motor mounting plate 6, screw mandrel 5 is located in middle screw, 8 two fixing posts of feed screw nut are located in screw and lower screw, three screws of blade 9 are corresponding with the position in feed screw nut hole in blade 9, after screw mandrel 5 passes endoporus and the locking nut 7 of bearing 4, it is then passed through the through hole of feed screw nut 8, it is then passed through the middle screw on blade 9 front end face, eventually pass through the square screw and elongate holes being provided with in blade 9, after installing, there is certain distance at the edge of the rear end distance square opening of screw mandrel 5.
In another embodiment, magnetic induction 11 can be fixed and be located on blade guide rail 10, inside blade guide rail 10 on a groove is set, magnetic induction 11 is installed in a groove, the corresponding magnetic stripe 12 of magnetic induction 11.
The kind of drive can select Chain conveyer or gear drive etc..
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (6)
1. a multi-leaf raster leaf position and speed detector, include motor, shaft coupling, screw mandrel, motor mounting plate, feed screw nut, blade, blade guide rail, magnetic induction head, magnetic stripe, it is characterized in that: described motor mounting plate is provided with through hole, described motor is arranged on motor mounting plate through hole sidepiece, described blade is located at motor mounting plate opposite side, described shaft coupling one end is connected with the output shaft of motor, the other end is connected with screw mandrel, described screw mandrel passes through hole, described feed screw nut is fixed on blade sidepiece, described screw mandrel one end passes feed screw nut, described blade is located in blade guide rail, described magnetic stripe is arranged on blade, described magnetic induction head is fixed on above magnetic stripe.
2. a kind of multi-leaf raster leaf position as claimed in claim 1 and speed detector, characterized by further comprising bearing insert, bearing, locking nut, described bearing insert is located at outside bearing, described bearing insert and locking nut set in through-holes, described motor is located at bearing side, described locking nut is located at bearing opposite side, described screw mandrel passes endoporus and the locking nut of bearing, described bearing insert radius is identical with through hole radius, and described locking nut maximum radius is identical with through hole radius.
3. a kind of multi-leaf raster leaf position as claimed in claim 2 and speed detector, it is characterized in that: described feed screw nut is fixed on above blade sidepiece, described feed screw nut assumes a " convex " shape, protruding end is arranged towards outside, described feed screw nut center is provided with through hole, described through hole is corresponding with screw mandrel, described feed screw nut side is provided with two fixing posts, described feed screw nut is located at locking nut sidepiece, described motor mounting plate sidepiece is provided with the groove corresponding with feed screw nut's shape, described groove center and through hole center superposition, described motor mounting plate is cuboid.
4. a kind of multi-leaf raster leaf position as claimed in claim 1 and speed detector, it is characterized in that: described blade both sides are vertically located in blade guide rail, described blade guide rail is rectangle or cylindrical, it is provided with guide groove inside described blade guide rail, described blade is located in guide groove, described channel widths is corresponding with blade two ends width, and described blade rail length is less than length of blade.
5. a kind of multi-leaf raster leaf position as claimed in claim 4 and speed detector, it is characterized in that: described magnetic stripe is arranged on blade sidepiece, described magnetic induction head is vertically located at above magnetic stripe and is located at Leaf Conductance trackside portion, and described magnetic stripe is located in the guide groove of blade guide rail.
6. a kind of multi-leaf raster leaf position as claimed in claim 3 and speed detector, it is characterized in that: described vane nose face is provided with three screws, it is divided into screw, middle screw and lower screw, described middle screw is corresponding with the lead to the hole site of motor mounting plate, described screw mandrel is located in middle screw, and two fixing posts of described feed screw nut are located in screw and lower screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029045.6U CN205843700U (en) | 2016-01-13 | 2016-01-13 | A kind of multi-leaf raster leaf position and speed detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029045.6U CN205843700U (en) | 2016-01-13 | 2016-01-13 | A kind of multi-leaf raster leaf position and speed detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205843700U true CN205843700U (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620029045.6U Expired - Fee Related CN205843700U (en) | 2016-01-13 | 2016-01-13 | A kind of multi-leaf raster leaf position and speed detector |
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| CN (1) | CN205843700U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180035969A1 (en) * | 2016-08-08 | 2018-02-08 | Shenyang Neusoft Medical Systems Co., Ltd. | Controlling motion position of multi-leaf collimator |
| EP3605806A4 (en) * | 2017-11-22 | 2020-12-30 | Tsinghua University | Dual-sensing feedback and transmission system for linear motor |
| GB2592982A (en) * | 2020-03-13 | 2021-09-15 | Elekta ltd | Leaf assembly for a multi-leaf collimator |
-
2016
- 2016-01-13 CN CN201620029045.6U patent/CN205843700U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180035969A1 (en) * | 2016-08-08 | 2018-02-08 | Shenyang Neusoft Medical Systems Co., Ltd. | Controlling motion position of multi-leaf collimator |
| US10646189B2 (en) * | 2016-08-08 | 2020-05-12 | Shanghai Neusoft Medical Technology Co., Ltd. | Controlling motion position of multi-leaf collimator |
| EP3605806A4 (en) * | 2017-11-22 | 2020-12-30 | Tsinghua University | Dual-sensing feedback and transmission system for linear motor |
| GB2592982A (en) * | 2020-03-13 | 2021-09-15 | Elekta ltd | Leaf assembly for a multi-leaf collimator |
| GB2592982B (en) * | 2020-03-13 | 2022-06-08 | Elekta ltd | Leaf assembly for a multi-leaf collimator |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20180113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |