CN105425646B - A kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system - Google Patents
A kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system Download PDFInfo
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- CN105425646B CN105425646B CN201510984974.2A CN201510984974A CN105425646B CN 105425646 B CN105425646 B CN 105425646B CN 201510984974 A CN201510984974 A CN 201510984974A CN 105425646 B CN105425646 B CN 105425646B
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- blade
- sliding block
- connector
- mobile sliding
- grating scale
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Abstract
The invention discloses a kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system, a kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system, including blade, grating scale, mobile sliding block, drive mechanism, sensor and surface-mounted integrated circuit, the mobile sliding block is connected with blade, and mobile sliding block is connected on grating scale and can be along grating scale slidably, the sensor is fixed on mobile sliding block, and sensor realizes that electric signal is connected with surface-mounted integrated circuit, the drive mechanism is used for band movable vane piece and does straight reciprocating motion.The present invention can not only improve the accuracy of detection of leaf position, and can also greatly reduce the time that is easy for installation, changing attrition component, improve capacity utilization, reduce the use cost of equipment.
Description
Technical field
The present invention relates to medicine equipment to manufacture control field, and in particular to a kind of multi-leaf optical grating soft readjustment formula encoder closes
Ring control system.
Background technology
The blade movement precision of multi-leaf optical grating is one of its important feature, the irradiation accuracy formed by blade movement
（Conformal degree）, the radiation exposure shape and dosage that are directly connected to patient focal area absorb size, are more directly connected to people
Body normal structure and the protection to greatest extent of sensitive organization, reach the Expected Results of tumour radiotherapy.Therefore in multi-leaf optical grating
Manufacture and using link, the measurement to blade movement accuracy value is just particularly important.
In order to improve the detection to blade movement precision, in the market employs various ways realization.New at present having is logical
Cross photoelectric encoder to be detected, its principle is that the grating on the code-bar being fixedly connected with blade by sensor detection determines leaf
The movement position of piece, and handled by a series of chips, dimension compensation is carried out, improves accuracy.But because code-bar and blade are consolidated
Fixed connection, blade occur in motion process because the influence conducted oneself with dignity with its machining accuracy produces beat, and then with activity code up and down
Beat occurs for bar, causes beat of detection source itself, this trueness error can not be handled by chip and compensated, therefore be transported
Dynamic accuracy value is limited, while the fast reciprocating movement of code-bar can cause heavy wear, and service life shortens, and makes product maintenance expense
It is higher.
The content of the invention
It is an object of the invention to provide a kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system, solves current
In blade movement accuracy detection, blade occurs in motion process because the influence generation conducted oneself with dignity with its machining accuracy is inclined up and down
Pendulum, and then drive code-bar that beat occurs, beat of detection source itself is caused, this trueness error is can not to handle to carry out by chip
Compensation, the problem of causing kinematic accuracy value limited；On the other hand, the fast reciprocating movement of code-bar can cause heavy wear, make
With the lost of life, make product maintenance costly.
The present invention to achieve the above object, is realized using following technical scheme：A kind of multi-leaf optical grating soft readjustment formula coding
Device closed-loop control system, including blade, grating scale, mobile sliding block, drive mechanism, sensor and surface-mounted integrated circuit, the shifting
Movable slider is connected with blade, and mobile sliding block is connected on grating scale and can be along grating scale slidably, the sensor
It is fixed on mobile sliding block, and sensor realizes that electric signal is connected with surface-mounted integrated circuit, the drive mechanism is used for band movable vane piece
Do straight reciprocating motion.
In this programme, what is detected is the movement position situation of blade, because blade and mobile sliding block are connected to what is connect,
I other words the motion of blade is embodied indirectly by moving sliding block, when blade does straight reciprocating motion under the drive of drive mechanism
When, mobile sliding block does synchronous linear motion on grating scale, and now, the sensor on mobile sliding block is then to the light on grating scale
Grizzly bar is detected, and testing result is fed back into surface-mounted integrated circuit and handled.Why this programme can realize accurate inspection
Survey, be that grating scale is during realization measures because this programme is using the combining structure of mobile sliding block, sensor and grating scale
Keep each independent with blade, the grating scale after fixing beat will not occur with the motion of blade, that is, ensure that detection
The reliability of source in itself, so as to further ensure the measurement accuracy of grating scale, this has essential distinction with traditional mode；It is another
Aspect, grating scale need not move back and forth, and move sliding block and be made of light, the less material of friction, can greatly reduce shifting
Friction between movable slider and grating scale, extend the service life of grating scale, and then reduce maintenance cost.
Further, preferably, in addition to elastomeric connector, one end of the elastomeric connector in blade with connecting
Connect, the other end is connected with mobile sliding block.Elastomeric connector can eliminate the test position deviation brought by blade movement beat.
Further, preferably, in addition to blade connector, one end and the blade of the blade connector connect
Connect, one end connection of the other end and elastomeric connector, the other end of elastomeric connector is connected with mobile sliding block.In blade connector
In the presence of elastomeric connector, while the test position deviation brought by blade movement beat can be eliminated, facilitate blade
Replacing.Specifically, when beat does not occur for blade, elastomeric connector is equivalent to the draw bar that length is fixed, blade movement production
Raw displacement is consistent with the displacement of mobile sliding block, and when blade produces beat, now elastomeric connector is had an effect, and passes through it
The beat that blade is brought is offset in deformation, it is ensured that blade is along the change in displacement on grating scale direction and the change in displacement for moving sliding block
Unanimously, ensure that the reliability of detection, that is to say, that elastomeric connector just produced when beat occurs in blade its this have
Elasticity, the beat up and down of blade is eliminated with the elasticity, prevent the beat from making to move the certain displacement of sliding block generation, avoid influenceing
Accuracy in detection.
Further, preferably, the elastomeric connector includes elasticity in flakes and is arranged on elasticity in flakes two
The flexure strip at end；
The blade connector includes connector body, and the middle part of connector body is provided with multiple for inserted elastic piece
Horizontal jack, the bottom of connector body are provided with the groove for being used for being connected on blade；
The mobile sliding block includes mobile slider body, and the top of the mobile slider body, which is provided with, to be used to fix flexure strip
Fixing groove, the bottom of mobile slider body, which is provided with, to be used to make to move the guide groove that slider body is connected on grating scale.Sensing
Device is arranged on mobile sliding block, and according to the difference of sensor mounting location, sensor can read the grating scale where itself,
The grating scale of offside can be read.
In this programme, specific design is carried out to blade connector, elastomeric connector and mobile sliding block, for convenience
The dismounting of blade connector and blade, the lower end of blade connector is arranged to groove, the groove and installation site on blade
Concrete structure matches, and blade connector can be directly clamped among on blade, in addition, the middle part of blade connector sets multiple transverse directions
Jack, for realizing the connection of blade connector and elastomeric connector, corresponding horizontal jack can be selected as needed；It is mobile to slide
The top of block sets a fixing groove, and bottom sets guide groove, and by guide groove, mobile sliding block is stuck on grating scale, mobile
Sliding block can move back and forth along grating scale；The flexure strip at elastomeric connector both ends is inserted respectively into horizontal jack, fixing groove, is risen
To the effect of connection blade connector and mobile sliding block, blade connector can be realized to mobile sliding block by elastomeric connector
Pulling and promotion, make blade position move be reacted to shift in position of the mobile sliding block on grating scale exactly.On the one hand,
Because grating scale is fixed, even if motion beat occurs in blade, will not also grating scale be caused to swing, compared to traditional code
Bar, ensure that the accuracy in detection source, and because of the flexure strip of elastomeric connector, especially elastomeric connector both ends,
Beat can be produced and the influence brought effectively to eliminate blade movement by itself plastic deformation, make sensor to grating scale
Accuracy of detection improve, so as to improve the positional precision of blade and conformal degree.On the other hand, blade connector, elastomeric connector,
Mobile sliding block, grating scale etc. are split element structure, can be increased or decreased according to the quantity of blade, after being
Quantity is more, and the multi-leaf optical grating of thickness slim vane provides convenient upgrading, and cost is designed and developed in reduction.
Further, preferably, the top of the connector body is provided with vertical screwed hole, the vertical screw thread
Hole passes through horizontal jack.After flexure strip is inserted into horizontal jack, bolt can be screwed in vertical screwed hole, make bolt by elasticity
Piece further compresses, it is ensured that the reliability of connection, the shift in position of blade is more accurately reflected on mobile sliding block.
Further, preferably, the elasticity of the elasticity in flakes is less than the elasticity of flexure strip.In blade beat not
When big, deviation caused by plastic deformation adaptation occurs for the flexure strip piece at both ends；When beat is larger, the bullet among elastomeric connector
Property plastic deformation occur simultaneously adapt to caused deviation with the flexure strip at both ends in flakes, now, with elastomeric connector one end bullet
The mobile chute that reed is fixed will not brought by blade beat to be influenceed, and keeps linear motion on grating scale all the time, and is fixed
Sensor in mobile chute can constantly detect the gratings strips on grating scale, and be transmitted by surface-mounted integrated circuit to chip
Middle carry out signal transacting, determines leaf position and compensates, and then improves the positional precision of blade.
Further, preferably, the drive mechanism includes motor, leading screw and nut, and the nut is nested
On blade, the leading screw matches with the nut, and leading screw passes through nut, the output shaft linkage of leading screw and motor.Motor is just
Reverse turn drives screw mandrel to rotate, and drives lower blade to carry out straight reciprocating motion in the rotation of screw mandrel.
Further, preferably, in addition to flexible PCB and winding box, one end of the flexible PCB are consolidated
Be scheduled on mobile sliding block and realize that electric signal is connected with sensor, the other end of flexible PCB be fixed in winding box and with collection
Realize that electric signal connects into circuit board.Flexible PCB can be arbitrarily bent without influenceing electric signal transmission, and winding box can be certainly
It is dynamic to adapt to drive the flexible caused length change of flexible PCB due to blade movement, while also do not carry out volume to blade moving belt
Outer resistance.
Further, preferably, the grating scale is in staggered distribution using multilayer.
The present invention compared with prior art, has advantages below and beneficial effect：
（1）The present invention is by using the combining structure form of grating scale, sensor and mobile sliding block, and grating scale fixation is not
Dynamic, the change in location of blade reflects the change in location to mobile sliding block on grating scale, and the beat of blade does not interfere with mobile cunning
Linear motion of the block on grating scale, so as to ensure that the accuracy in detection source, provided for the high precision test of blade movement
Ensure.
（2）Do not move present invention employs grating scale, and made by the less mobile sliding block of material hardness with grating scale
To be oriented to the mode moved, make grating scale not easy to wear, improve service life, reduce maintenance cost.
（3）Invention introduces elastomeric connector, and by elastomeric connector be designed as it is middle spring in flakes, both ends flexure strip
Structure type, elasticity in flakes and flexure strip can effectively be eliminated by itself plastic deformation beat caused by blade movement and
The influence brought, sensor is improved the accuracy of detection of grating scale, and then improve the accuracy of detection to leaf position
And the conformal degree of blade.
（4）The present invention uses split element structure, i.e., each blade corresponding blade connector, an elastic connection
Device, mobile sliding block, grating scale, can carry out increasing or decreasing blade connector, elastomeric connector, movement according to the quantity of blade
The quantity of sliding block, grating scale, it is that later quantity is more, the multi-leaf optical grating of thickness slim vane provides convenient upgrading, reduces design and opens
Send out cost.
（5）The present invention is simple in construction, and failture evacuation is easy, easy for installation, and the time for changing attrition component greatly reduces, and pair sets
There is huge lifting the standby normal use time, further increasing capacity utilization, reduces the use cost of equipment.
Brief description of the drawings
Fig. 1 is the stereogram of the present invention；
Fig. 2 is the front view of the present invention；
Fig. 3 is the partition structural representation of the present invention；
Fig. 4 is the structural representation of blade connector；
Fig. 5 is the structural representation of elastomeric connector；
Fig. 6 is the structural representation of mobile sliding block；
Fig. 7 is the structural representation of present invention when grating scale uses bilayer arrangement.
It is entitled corresponding to reference in figure：1st, blade, 2, blade connector, 21, vertical screwed hole, 22, laterally insert
Hole, 23, groove, 3, elastomeric connector, 31, flexure strip, 32, elasticity in flakes, 4, backplate, 5, flexible PCB, 6, winding box,
7th, surface-mounted integrated circuit, 8, mobile sliding block, 81, fixing groove, 82, guide groove, 9, grating scale, 10, drive mechanism.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment：
As shown in Fig. 1 ~ Fig. 3, a kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system described in the present embodiment,
Including blade 1, grating scale 9, mobile sliding block 8, drive mechanism 10, sensor and surface-mounted integrated circuit 7, mobile sliding block 8 and blade 1
Connection, and mobile sliding block 8 is connected on grating scale 9 and can be along grating scale 9 slidably, blade 1 is in drive mechanism 10
Straight reciprocating motion is done under drive, the change in location of blade 1 is reflected in change in location of the mobile sliding block 8 on grating scale 9, sensing
Device is fixed on mobile sliding block 8, and sensor realizes that electric signal is connected with surface-mounted integrated circuit 7, and sensor detects to move sliding block 8
Position, and positional information is fed back into surface-mounted integrated circuit 7, surface-mounted integrated circuit 7 carries out subsequent treatment again.
In the present embodiment, because grating scale 9 is fixed and relatively independent with blade 1 all the time, separated, therefore blade 1
Motion will not have an impact to grating scale 9, and mobile sliding block 8 moves along a straight line under the induced effect of blade 1 along grating scale 9,
The change in location for the mobile sliding block 8 that sensor detects is the change in location of corresponding blade 1, is examined relative to traditional code type
Survey, the accuracy of detection of the present embodiment significantly improves.In use, mobile sliding block 8 selects to be made up of the less material of hardness, is protecting
The mobile sliding block of card can slidably on the basis of, additionally it is possible to make grating scale 9 be not easy to be worn, improve service life, reduce dimension
Protect cost.
The influence that beat is brought is produced to further eliminate blade 1 in motion process, the present embodiment can also increase bullet
Property connector 3, one end of elastomeric connector 3 is connected with blade 1, and the other end is connected with mobile sliding block 8, elastomeric connector 3 from
Body can produce certain plastic deformation to adapt to the beat of blade 1, enable the mobile sliding block 8 being connected with elastomeric connector 3
Linear motion state is remained at, ensures the reliability of detection.
In order to facilitate the dismounting of blade 1, the present embodiment can also increase blade connector 2, one end of blade connector 2 with
Blade 1 is connected, and the other end is connected with one end of elastomeric connector 3, and the other end of elastomeric connector 3 is connected with mobile sliding block 8.More
Specifically, the lower end of blade connector 2 can be arranged to groove structure, the groove structure is just stuck on blade 1, so as to pass through
Blade connector 2, elastomeric connector, realize that blade 1 is synchronous with the action of mobile sliding block 8.
More specifically, the combination installation between all parts for convenience, the present embodiment can also to elastomeric connector 3,
Blade connector 2, mobile sliding block 8 do following specific design：
As shown in Fig. 4 ~ 6, elastomeric connector 3 includes elasticity and 32 and is arranged on the flexure strip at elasticity 32 both ends in flakes in flakes
31, flexure strip 31 can be the flexible structure such as spring leaf, elasticity in flakes 32 elasticity can be designed as being less than flexure strip
31 elasticity, that is to say, that when the beat of blade 1 is little, deviation caused by plastic deformation adaptation occurs for the flexure strip 31 at both ends；
When the beat of blade 1 is larger, elasticity 32 occurs to be plastically deformed to adapt to caused deviation simultaneously with the flexure strip 31 at both ends in flakes,
The mobile sliding block 8 now fixed with one end flexure strip 31 of elastomeric connector 3 will not brought by the beat of blade 1 to be influenceed, and is existed all the time
Linear motion is kept on grating scale 9；
Blade connector 2 includes connector body, and the middle part of connector body is provided with multiple for inserted elastic piece 31
Horizontal jack 22, the bottom of connector body are provided with the groove 23 for being used for being connected on blade 1；
Mobile sliding block 8 includes mobile slider body, and the top of mobile slider body, which is provided with, to be used to fix consolidating for flexure strip 31
Determine groove 81, the bottom of mobile slider body, which is provided with, to be used to make to move the guide groove 82 that slider body is connected on grating scale 9.
In order to further ensure that the reliability of connection, the present embodiment can also set vertical spiral shell at the top of blade connector 2
Pit 21, vertical screwed hole 21 pass through horizontal jack 22, and flexure strip 31 is inserted after horizontal jack 22, from vertical screwed hole 21
Bolt is screwed in, makes bolt by the clamping of flexure strip 31, strengthens the fixing of connection.
It should be noted that drive mechanism 10 can arbitrarily be moved with movable vane piece 1 and match with overall structure
Structure, specifically, the present embodiment can using following structure come realize driving：Motor, leading screw and nut composition driving machine
Structure, nut are nested on blade 1, and leading screw matches with nut, and leading screw passes through nut, the output shaft linkage of leading screw and motor, electricity
Machine positive and negative rotation drives screw mandrel to rotate, and in the case where the rotation of screw mandrel drives, blade carries out straight reciprocating motion.
In order to avoid motion of the signal wire for mobile sliding block 8 and blade 1 brings influence, the present embodiment can also do as
Lower design, increase flexible PCB 5 and winding box 6, one end of flexible PCB 5 is fixed on mobile sliding block 8 and and sensor
Realize that electric signal connects, the other end of flexible PCB 5 is fixed in winding box 6 and realizes that electric signal connects with surface-mounted integrated circuit 7
Connect, winding box 6 uses the design similar with tape measure work, and when blade 1, which moves, drives flexible PCB 5 to stretch, winding box 6 is certainly
Take-up or unwrapping wire adaptively are carried out to flexible PCB 5, make flexible PCB 5 on the basis of realizing that electric signal transmits, will not
Influence the motion of mobile sliding block 8.In addition, in order to protect flexible PCB 5, a backplate 4 can be set on flexible PCB 5.
Further, since the thickness of the thickness of blade 1 and grating scale 9 and sensor has differences, the thickness of blade 1 is less than
The thickness of grating scale 9 and sensor, when the following quantity of blade 1 is more, the grating scale 9 and sensing of the top of blade 1 can be caused
Device can not correspond therewith, and to solve this problem, inventor has carried out the design of uniqueness.As shown in fig. 7, the present embodiment will
Grating scale 9 is designed to sandwich construction, and grating scale 9 and sensor between layers are in staggered distribution, i.e., in the gap correspondence of lower floor
The grating scale 9 and sensor of layer, while ensure in the vertical space between each grating scale 9 and corresponding blade 1, do not have it
Its grating scale 9 blocks, that is to say, that the underface of each grating scale 9 does not have other grating scales 9, so as to accomplish grating
Chi 9 corresponds with blade 1, and does not disturb between each other, so not only ensure that enough space mounting grating scales 9, full
Foot blade 1 is corresponding with grating scale 9, and can also effectively reduce the horizontal space shared by grating scale 9, reduces whole device
Volume, make in sets of lines and not chaotic, also more convenient maintenance and replacing.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (4)
- A kind of 1. multi-leaf optical grating soft readjustment formula encoder closed-loop control system, it is characterised in that：Including blade（1）, grating scale （9）, mobile sliding block（8）, drive mechanism（10）, sensor and surface-mounted integrated circuit（7）, the mobile sliding block（8）With blade（1） Connection, and mobile sliding block（8）It is connected to grating scale（9）Above and can be along grating scale（9）Slidably, the sensor is fixed In mobile sliding block（8）On, and sensor and surface-mounted integrated circuit（7）Realize that electric signal connects, the drive mechanism（10）For band Movable vane piece（1）Do straight reciprocating motion；Also include elastomeric connector（3）, the elastomeric connector（3）One end with blade（1）Connection, the other end are slided with mobile Block（8）Connection；Also include blade connector（2）, the blade connector（2）One end and blade（1）Connection, the other end and elastic connection Device（3）One end connection, elastomeric connector（3）The other end and mobile sliding block（8）Connection；The elastomeric connector（3）Including elasticity in flakes（32）And it is arranged on elasticity in flakes（32）The flexure strip at both ends（31）；The blade connector（2）Including connector body, the middle part of connector body is used for inserted elastic piece provided with multiple （31）Horizontal jack（22）, the bottom of connector body, which is provided with, to be used to be connected to blade（1）On groove（23）；The mobile sliding block（8）Including mobile slider body, the top of the mobile slider body, which is provided with, to be used to fix flexure strip （31）Fixing groove（81）, the bottom of mobile slider body, which is provided with to be used to making moving slider body, is connected to grating scale（9）On Guide groove（82）；The top of the connector body is provided with vertical screwed hole（21）, the vertical screwed hole（21）Through horizontal jack （22）；The elasticity is in flakes（32）Elasticity be less than flexure strip（31）Elasticity.
- A kind of 2. multi-leaf optical grating soft readjustment formula encoder closed-loop control system according to claim 1, it is characterised in that： The drive mechanism（10）Including motor, leading screw and nut, the nut is nested in blade（1）On, the leading screw with it is described Nut matches, and leading screw passes through nut, the output shaft linkage of leading screw and motor.
- A kind of 3. multi-leaf optical grating soft readjustment formula encoder closed-loop control system according to claim 1, it is characterised in that： Also include flexible PCB（5）And winding box（6）, the flexible PCB（5）One end be fixed on mobile sliding block（8）It is upper and with Sensor realizes that electric signal connects, flexible PCB（5）The other end be fixed on winding box（6）Interior and and surface-mounted integrated circuit（7） Realize that electric signal connects.
- A kind of 4. multi-leaf optical grating soft readjustment formula encoder closed-loop control system according to claim 1, it is characterised in that： The grating scale（9）It is in staggered distribution using multilayer.
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| CN201510984974.2A CN105425646B (en) | 2015-12-25 | 2015-12-25 | A kind of multi-leaf optical grating soft readjustment formula encoder closed-loop control system |
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| CN106344061B (en) * | 2016-08-08 | 2019-09-17 | 东软医疗系统股份有限公司 | Multi-leaf raster leaf movement position control device, method and type beeline accelerator |
| CN109217554B (en) * | 2018-11-23 | 2023-11-03 | 四川云盾光电科技有限公司 | Linear module closed loop system and control method thereof |
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| US5160847A (en) * | 1989-05-03 | 1992-11-03 | The Parvus Corporation | Dynamic multivane electron arc beam collimator |
| CN1413746A (en) * | 2001-10-23 | 2003-04-30 | 深圳市一体智能技术有限公司 | Forming detection method of multi-blade collimator and multi-blade collimator |
| CN102117051A (en) * | 2009-12-31 | 2011-07-06 | 深圳市海博科技有限公司 | Multi-leaf collimator control system |
| EP2500909A1 (en) * | 2011-03-16 | 2012-09-19 | Deutsches Krebsforschungszentrum Stiftung des Öffentlichen Rechts | Position sensoring method and system for a multi-leaf collimator |
| CN105022413A (en) * | 2015-08-20 | 2015-11-04 | 成都伊贝基科技有限公司 | Electric multi-leaf grating encoder closed-loop control system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205210582U (en) * | 2015-12-25 | 2016-05-04 | 成都伊贝基科技有限公司 | Multi leaf collimator soft readjustment formula encoder closed loop control system |
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2015
- 2015-12-25 CN CN201510984974.2A patent/CN105425646B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160847A (en) * | 1989-05-03 | 1992-11-03 | The Parvus Corporation | Dynamic multivane electron arc beam collimator |
| CN1413746A (en) * | 2001-10-23 | 2003-04-30 | 深圳市一体智能技术有限公司 | Forming detection method of multi-blade collimator and multi-blade collimator |
| CN102117051A (en) * | 2009-12-31 | 2011-07-06 | 深圳市海博科技有限公司 | Multi-leaf collimator control system |
| EP2500909A1 (en) * | 2011-03-16 | 2012-09-19 | Deutsches Krebsforschungszentrum Stiftung des Öffentlichen Rechts | Position sensoring method and system for a multi-leaf collimator |
| CN105022413A (en) * | 2015-08-20 | 2015-11-04 | 成都伊贝基科技有限公司 | Electric multi-leaf grating encoder closed-loop control system |
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