CN206193542U - Vane of multi -vane collimator position monitoring device - Google Patents
Vane of multi -vane collimator position monitoring device Download PDFInfo
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- CN206193542U CN206193542U CN201621176265.8U CN201621176265U CN206193542U CN 206193542 U CN206193542 U CN 206193542U CN 201621176265 U CN201621176265 U CN 201621176265U CN 206193542 U CN206193542 U CN 206193542U
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- blade
- circuit board
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- proximity transducer
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Abstract
The utility model provides a vane of multi -vane collimator position monitoring device. It relates to radiation therapy and radiates the multi -leaf collimator who restraints with other industry, and mainly the current multi -leaf collimator blade position monitoring precision of solution is hanged down, life is short and the technical problem of interference killing feature difference. It includes circuit board, a plurality of infrared proximity sensor. The circuit board sets up directly over the blading, and a plurality of proximity sensor form a line along blade motion's direction equidistance and fix on the circuit board, and each blade corresponds one and is listed as the proximity sensor that the equidistance was arranged. The blade tail end is when the proximity sensor on the circuit board, and the proximity sensor that corresponds sends the corresponding signal of telecommunication, and control system can detect the position that the blade tail end reachd according to the position of each sensor on the circuit board with the signal of telecommunication that the sensor sent, reaches the all blade position's of detection purpose.
Description
Technical field
The present invention relates to radiation therapy and the multi-diaphragm collimator of other industrial radiation beams.
Background technology
In current radiotherapy field, multi-diaphragm collimator（MLC）It is widely used in radiation therapy, including intensity modulated therapy and suitable
Shape is treated, and its application target is exactly the injury for reducing normal tissue to greatest extent, and the agent of focus target area is increased as much as possible
Amount.To realize this target, the accuracy of blade positioning, the Detection ＆ Controling of blade movement speed are just particularly important.When
What preceding known leaf position detection was commonly used has three kinds of methods：1st, using rotary encoder, by detecting motor axle
The position of blade is inferred in angular displacement, and the movement velocity of blade is calculated by the rotating speed of measurement motor axle；2nd, using potentiometer,
Potentiometer is arranged on above or below blade, and when motor driving blade is moved, potentiometer movable end is also being moved, potentiometer
Resistance is changed with moving for movable end, and the displacement of blade is gone out from the change calculations of potentiometer resistance；3rd, shooting is used
Device, vane position information can directly reflect that camera head reads light field imaging and calculates leaf position in light field.These three methods
All Shortcomings, will carry out driving blade and move using rotary encoder by a series of transmission mechanisms, the junction of transmission mechanism
There is tolerance unavoidably, ultimately result in leaf position precision low；Shortcoming using potentiometer is that potentiometer movable end brush easily grinds
Damage, service life is short；Then easily disturbed by ambient light using camera head.
The content of the invention
The present invention is to solve existing multi-diaphragm collimator leaf position monitoring accuracy is low, the short and anti-interference energy of service life
The technical problem of power difference.
In order to solve the above technical problems, the present invention is adopted the technical scheme that：A kind of multi-diaphragm collimator leaf position prison
Device is surveyed, it includes circuit board, multiple proximity transducers.Proximity transducer uses infrared proximity transducer.Circuit board is arranged on
The surface of blade group, multiple proximity transducers form a line along the direction of blade movement, and proximity transducer is equidistantly mounted on
On circuit board, the proximity transducer of each blade one row equidistant arrangement of correspondence.Blade tail end by circuit board close to biography
During sensor, corresponding proximity transducer sends corresponding electric signal, and is transmitted to multi-leaf collimator control system, according to each biography
The electric signal that sensor position on circuit boards and proximity transducer send, can detect the position of blade tail end arrival.
After above-mentioned technical proposal is employed, fixed multiple proximity transducer moment on circuit boards are to all blades position
Put and be monitored, when certain leaf position changes, corresponding one or more proximity transducer output changes
And it is transferred to control system, the control system motion of controlled motor and the position of monitoring blade at any time accordingly, because this programme is adopted
It is non-contacting infrared proximity transducer, in the absence of mechanical wear, simple structure, long service life.The device is to leaf
The direct monitoring of piece position, improves the positional precision of blade so that the safety and reliability of the whole machine of multi-diaphragm collimator is able to
Lifting.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
It is designated in figure：1 is blade, 2 is proximity transducer, 3 is circuit board.
Specific embodiment
As shown in figure 1, a kind of multi-diaphragm collimator leaf position monitoring device, it includes circuit board, multiple proximity transducers.
As shown in figure 1, described circuit board is arranged on the surface of blade group, multiple proximity transducers are along blade movement
Direction equidistantly form a line, install on circuit boards, each blade correspondence one row equidistant arrangement proximity transducer.
Whether described proximity transducer can monitor its corresponding blade tail end in the range of the Sensor monitoring, and knot
Fruit changes into electric signal output and is transmitted to multi-leaf collimator control system.
As shown in figure 1, described proximity transducer has one or more sensor when blade movement is subjected to displacement
Output changes, and the change and the installation site of sensor that multi-diaphragm collimator system is exported by these sensors calculate blade and produced
Raw displacement and current leaf position, reach the purpose of real-time detection entirety leaf position.
Claims (4)
1. a kind of multi-diaphragm collimator leaf position monitoring device, it is characterized in that, it includes circuit board, multiple proximity transducers, institute
State the surface that circuit board is arranged on blade group；The multiple proximity transducer forms a line along the direction of blade movement, etc.
Away from circuit installing plate；The proximity transducer of each blade one row equidistant arrangement of correspondence, blade tail end is by circuit board
On proximity transducer when, corresponding proximity transducer sends corresponding electric signal, according to each sensor on circuit boards
The electric signal that position and proximity transducer send, can detect the position of blade tail end arrival.
2. a kind of multi-diaphragm collimator leaf position monitoring device as claimed in claim 1, it is characterized in that, it is described close to sensing
Whether device can monitor its corresponding blade tail end in the range of the Sensor monitoring, and result is changed into electric signal output be transmitted to
Multi-leaf collimator control system.
3. a kind of multi-diaphragm collimator leaf position monitoring device as claimed in claim 1, it is characterized in that, it is described close to sensing
Device has the output of one or more sensor when blade movement is subjected to displacement and changes, and multi-diaphragm collimator system is passed by these
The change of sensor output and the installation site of sensor calculate displacement and the current leaf position produced by blade.
4. a kind of multi-diaphragm collimator leaf position monitoring device as claimed in claim 1, it is characterized in that, it is described close to sensing
Device is infrared proximity transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176265.8U CN206193542U (en) | 2016-10-27 | 2016-10-27 | Vane of multi -vane collimator position monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176265.8U CN206193542U (en) | 2016-10-27 | 2016-10-27 | Vane of multi -vane collimator position monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206193542U true CN206193542U (en) | 2017-05-24 |
Family
ID=58733402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621176265.8U Active CN206193542U (en) | 2016-10-27 | 2016-10-27 | Vane of multi -vane collimator position monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN206193542U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386813A (en) * | 2017-07-19 | 2017-11-24 | 昆山惠禾新能源科技有限公司 | A kind of electric lock based on stroke detection |
| CN109674487A (en) * | 2019-01-28 | 2019-04-26 | 飞瑞医疗器械(嘉兴)有限公司 | Manual beam-defining clipper |
-
2016
- 2016-10-27 CN CN201621176265.8U patent/CN206193542U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386813A (en) * | 2017-07-19 | 2017-11-24 | 昆山惠禾新能源科技有限公司 | A kind of electric lock based on stroke detection |
| CN109674487A (en) * | 2019-01-28 | 2019-04-26 | 飞瑞医疗器械(嘉兴)有限公司 | Manual beam-defining clipper |
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