CN105327455A - Nuclide after-loading therapy equipment channel selection system - Google Patents
Nuclide after-loading therapy equipment channel selection system Download PDFInfo
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- CN105327455A CN105327455A CN201510707899.5A CN201510707899A CN105327455A CN 105327455 A CN105327455 A CN 105327455A CN 201510707899 A CN201510707899 A CN 201510707899A CN 105327455 A CN105327455 A CN 105327455A
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Abstract
The invention discloses a nuclide after-loading therapy equipment channel selection system, which comprises a rotary mechanism, a code detection module and a motor control module, wherein peripheral equipment comprises a dividing head and a radioactive source pipeline of after-loading therapy equipment; the rotary mechanism is connected on the dividing head in a movable manner and drives the radioactive source pipeline to rotate; the code detection module detects a rotation position of the rotary mechanism and outputs a corresponding coded signal; and the motor control module calculates a rotation control signal of the rotary mechanism according to the coded signal, and controls the rotary mechanism to rotate to the predetermined position. The nuclide after-loading therapy equipment channel selection system can effectively solve the problems of complicated system structure, high cost and imprecise in-place operation in the prior art.
Description
Technical field
The invention belongs to the technical field of internal radiation radiotherapy apparatus, be specifically related to a kind of nucleic afterloader channel selecting system.
Background technology
Nucleic afterloader is the prioritization scheme according to planning system; computer remote control is utilized in therapeutic room; radioactive source is sent to the equipment in patient's supply radiator duct, corresponding parked position carrying out radiotherapy; there is nearly Yuan Chu target area local dose high; range is short; the feature that periphery dosage falls rapidly, can effectively improve tumor by local exposure dose, protection normal surrounding tissue and vitals.
Nucleic afterloader is realize the treatment to the large area such as skin carcinoma, breast carcinoma tumor, generally all be designed with multiple passage, the rotation that during treatment, radioactive source sets from different pipelines by treatment plan goes out source, after arriving TA position, tumor is irradiated, 18 can be had at most to treat passage.The principle that the channel selecting of conventional afterloading unit realizes at present is that radioactive source pipeline is connected on rotating arm, channel selecting motor rotating arm rotates, rotary encoder gathers the position of rotating arm, arrive rotating arm stop motion behind dedicated tunnel position, the passage that radioactive source just can be specified from index dial goes out source.The subject matter of this control mode is complex structure, driver and rotary encoder expensive, put in place and inaccurately easily cause radioactive source to go out source to be obstructed.
Summary of the invention
In view of this, the invention provides a kind of nucleic afterloader channel selecting system, effectively can to solve in prior art system structure complicated, cost is high, and the not problem accurately that puts in place.
Realize technical scheme of the present invention as follows:
A kind of nucleic afterloader channel selecting system, comprises rotating mechanism, code detection assembly and motor control module; Ancillary equipment is dividing head and the radioactive source pipeline of afterloader;
Described rotating mechanism is movably connected on dividing head, radioactive source pipeline is driven to rotate, the position of rotation of code detection component detection rotating mechanism also exports corresponding coded signal, and motor control module calculates the rotation control signal of rotating mechanism according to this coded signal thus control rotating mechanism rotates to precalculated position.
Further, described rotating mechanism comprises central rotating shaft, rotating arm, front baffle ring, rear baffle ring, coding disk and motor;
Described rotating arm, front baffle ring, rear baffle ring and coding disk are circular ring structure, and internal diameter all with central rotating shaft equal diameters; Rotating arm is arranged radioactive source Pipe installing hole;
The anchor ring of described coding disk is divided into the fan-shaped of 20 equal portions, and draw 20 fan-shaped bisectors, disk radially has five concentric code channels, the cross point of code channel and fan-shaped bisector is code identification point, no more than five apertures are beaten, as notch by binary coding rule by five code identification point places in the fan-shaped bisector of every bar;
One end of central rotating shaft is successively through the output shaft of the motor that is connected after rotating arm, front baffle ring, rear baffle ring and coding disk, and the central rotating shaft other end is movably connected in the center of rotation installing hole of dividing head; Radioactive source pipeline, through stepping motor rotating shaft and central rotating shaft, passes between baffle ring and rear baffle ring in the past, is fixed in the radioactive source Pipe installing hole of rotating arm.
Further, what the code identification point place on coding disk had notch is " 1 ", without notch is " 0 ", article 20, fan-shaped bisector from " 00000 " to " 10010 " and " 11111 " totally 20 codings, wherein 18 radioactive sources of " 00001 " to " 10010 " totally 18 corresponding index dials of coding go out source channels, the restraining position coding that " 11111 " rotate clockwise for coding disk.
Further, described code detection assembly comprises U-shaped support, 5 emission phototubes and 5 reception photocells;
U-shaped support is connected in dividing head inside, 5 emission phototubes and 5 reception photocell one_to_one corresponding are arranged on two opposite faces of U-shaped support, coding disk is in U-shaped support, and code identification point in every fan-shaped bisector of bar and 5 emission phototubes and 5 to receive photocell corresponding;
Further, described motor control module comprises coded treatment circuit and stepper motor driving circuit; Coded treatment circuit judges radioactive source pipeline position according to the coded signal receiving photocell output, and then calculate the control signal exporting stepper motor driving circuit, stepper motor driving circuit drives motor to rotate according to described control signal, thus makes radioactive source pipeline arrive precalculated position.
Beneficial effect:
1, structure is simple, easy to process.
2, instead of photoelectric encoder with channel coding dish and channel coding detection components, use a slice stepper motor driver chip to instead of stepper motor driver, reduce the cost of afterloading unit.
3, the passage position that puts in place is accurate, the situation that there will not be radioactive source pipeline and index dial to go out source channels position deviation to cause radioactive source to go out source being obstructed.
Accompanying drawing explanation
Fig. 1 is rotating mechanism schematic diagram of the present invention.
Fig. 2 (a) is the front view of coding disk of the present invention.
Fig. 2 (b) is the left view of coding disk of the present invention.
Fig. 3 is stepping motor control circuit schematic diagram of the present invention.
Wherein, 1-dividing head; 2-central rotating shaft; 3-rotating arm; Baffle ring before 4-; Baffle ring after 5-; 6--coding disk; 7-motor; 8-radioactive source pipeline; 9-U type support; 10-emission phototube; 11-receives photocell; 12-hold-down screw.
Detailed description of the invention
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
The invention provides a kind of nucleic afterloader channel selecting system, comprise rotating mechanism, code detection assembly and motor control module; Ancillary equipment is dividing head 1 and the radioactive source pipeline 8 of afterloader;
As shown in Figure 1, described rotating mechanism comprises central rotating shaft 2, rotating arm 3, front baffle ring 4, rear baffle ring 5, coding disk 6 and motor 7;
Described rotating arm 3, front baffle ring 4, rear baffle ring 5 and coding disk 6 are circular ring structure, and internal diameter all with central rotating shaft 2 equal diameters; Rotating arm 3 is arranged radioactive source pipeline 8 installing hole;
As shown in Fig. 2 (a) He Fig. 2 (b), the anchor ring of described coding disk 6 is divided into the fan-shaped of 20 equal portions, and draw 20 fan-shaped bisectors, disk radially has five concentric code channels, the cross point of code channel and fan-shaped bisector is code identification point, no more than five apertures are beaten, as notch by binary coding rule by five code identification point places in the fan-shaped bisector of every bar; What the code identification point place on coding disk 6 had notch is " 1 ", without notch is " 0 ", article 20, fan-shaped bisector from " 00000 " to " 10010 " and " 11111 " totally 20 codings, wherein 18 radioactive sources of " 00001 " to " 10010 " totally 18 corresponding index dials of coding go out source channels, the restraining position coding that " 11111 " rotate clockwise for coding disk 6.
One end of central rotating shaft 2 is successively through the output shaft of the motor 7 that is connected after rotating arm 3, front baffle ring 4, rear baffle ring 5 and coding disk 6, and central rotating shaft 2 other end is movably connected in the center of rotation installing hole of dividing head 1; Radioactive source pipeline 8, through motor 7 rotating shaft and central shaft, passes between baffle ring 4 and rear baffle ring 5 in the past, is fixed in radioactive source pipeline 8 installing hole of rotating arm 3;
Code detection assembly comprises U-shaped support 9,5 emission phototubes 10 and 5 reception photocells 11;
U-shaped support 9 is connected on the rear plate of dividing head 1 by hold-down screw 12,5 emission phototubes 10 and 5 reception photocell 11 one_to_one corresponding are arranged on the opposite face of U-shaped support 9 two support arms, coding disk 6 is in U-shaped support 9, and code identification point in every fan-shaped bisector of bar and 5 emission phototubes 10 and 5 to receive photocell 11 corresponding; In coding disk 6 rotation process, the fan-shaped bisector that there is notch when a certain bar overlaps with 5 emission phototubes 10, then the light launched of emission phototube 10 makes corresponding reception photocell 11 conducting through notch, produce the coded signal of " 1 ", the reception photocell 11 not receiving light produces the coding of " 0 ", like this, corresponding 5 binary codings are just obtained.In the fan-shaped bisector of " 00000 " or at the zone line of adjacent two bisectors, receive the coding that photocell 11 produces and be " 00000 ", the coded signal of " 00000 " can not, by computer recognizing, be invalid code.The coding only occurring " 1 " is just efficient coding.
As shown in Figure 3, motor control module comprises coded treatment circuit and stepper motor driving circuit; The coded signal M0-M4 receiving photocell 11 output flows to the CPU of coded treatment circuit after Phototube Coupling and level conversion by the I/O interface in coded treatment circuit, CPU judges coding disk 6 (also can think radioactive source pipeline 8) position according to received signal, judges whether radioactive source pipeline 8 arrives predetermined channel position.As do not arrived predetermined channel position, CPU calculates and exports control signal (comprising enabling signal and direction signal) to stepper motor driving circuit, stepper motor driving circuit drives motor 7 to rotate according to described control signal, thus drives radioactive source pipeline 8 to arrive predetermined channel position.Stepper motor driving circuit and channel coding treatment circuit design on same circuit board, use a slice motor 7 driving chip to instead of motor 7 driver.
The control flow of motor control module is as follows:
1, after system start-up, first CPU exports and starts and rotate forward signal to stepper motor driving circuit, and motor 7 rotates forward.
2, I/O interface detects coded signal M0-M4, forms five binary codings.
3, when coding disk 6 to turn between adjacent two fan-shaped bisectors (i.e. fan-shaped bisector restrain do not overlap) with photoelectricity or when forwarding the fan-shaped bisector place being encoded to " 00000 " to, five binary codings are 00000, be invalid code, motor 7 continues to rotate forward.When coding disk 6 turn to fan-shaped bisector and photoelectricity restrain overlap and five binary codings are one in 00001 to 10010 or 11111 time, accordingly, representing channel number that current radio source capsule road 8 arrives is or forward restraining position in 1-18 passage.
If the channel number of 4 current arrival is less than predetermined channel number, motor control module control step motor 7 continues to rotate forward; If the channel number of current arrival is greater than predetermined channel number or forward restraining position, the CPU in coded treatment circuit exports and starts and reversely rotate signal to stepper motor driving circuit, and stepper motor driving circuit control step motor 7 reversely rotates; If the channel number of current arrival equals predetermined channel number, first CPU exports stop signal to stepper motor driving circuit, and control step motor 7 stops the rotation.Now namely radioactive source pipeline 8 reaches predetermined channel position, and radioactive source just can source from the index dial passage of specifying.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a nucleic afterloader channel selecting system, is characterized in that, comprises rotating mechanism, code detection assembly and motor control module; Ancillary equipment is dividing head (1) and the radioactive source pipeline (8) of afterloader;
Described rotating mechanism is movably connected on dividing head, radioactive source pipeline is driven to rotate, the position of rotation of code detection component detection rotating mechanism also exports corresponding coded signal, and motor control module calculates the rotation control signal of rotating mechanism according to this coded signal thus control rotating mechanism rotates to precalculated position.
2. a kind of nucleic afterloader channel selecting system as claimed in claim 1, it is characterized in that, described rotating mechanism comprises central rotating shaft (2), rotating arm (3), front baffle ring (4), rear baffle ring (5), coding disk (6) and motor (7);
Described rotating arm (3), front baffle ring (4), rear baffle ring (5) and coding disk (6) are circular ring structure, and internal diameter all with central rotating shaft (2) equal diameters; Rotating arm (3) is arranged radioactive source pipeline (8) installing hole;
The anchor ring of described coding disk (6) is divided into the fan-shaped of 20 equal portions, and draw 20 fan-shaped bisectors, disk radially has five concentric code channels, the cross point of code channel and fan-shaped bisector is code identification point, no more than five apertures are beaten, as notch by binary coding rule by five code identification point places in the fan-shaped bisector of every bar;
One end of central rotating shaft (2) is successively through the output shaft of motor (7) that are connected after rotating arm (3), front baffle ring (4), rear baffle ring (5) and coding disk (6), and central rotating shaft (2) other end is movably connected in the center of rotation installing hole of dividing head (1); Radioactive source pipeline (8) is through motor (7) rotating shaft and central shaft, in the past pass between baffle ring (4) and rear baffle ring (5), be fixed in radioactive source pipeline (8) installing hole of rotating arm (3).
3. a kind of nucleic afterloader channel selecting system as claimed in claim 1, it is characterized in that, described code detection assembly comprises U-shaped support (9), five emission phototubes (10) and five receptions photocell (11);
It is inner that U-shaped support (9) is connected in dividing head (1), 5 emission phototubes (10) and 5 reception photocell (11) one_to_one corresponding are arranged on two opposite faces of U-shaped support (9), coding disk (6) is in U-shaped support (9), and code identification point in every fan-shaped bisector of bar and 5 emission phototubes (10) and 5 to receive photocell (11) corresponding.
4. a kind of nucleic afterloader channel selecting system as claimed in claim 1, is characterized in that, described motor control module comprises coded treatment circuit and motor (7) drive circuit; The coded signal that coded treatment circuit exports according to reception photocell (11) judges radioactive source pipeline (8) position, and then calculate the control signal exporting motor (7) drive circuit, motor (7) drive circuit drives motor (7) to rotate according to described control signal, thus makes radioactive source pipeline (8) arrive precalculated position.
5. a kind of nucleic afterloader channel selecting system as claimed in claim 2, it is characterized in that, what the code identification point place on described coding disk (6) had notch is " 1 ", without notch is " 0 ", article 20, fan-shaped bisector from " 00000 " to " 10010 " and " 11111 " totally 20 codings, wherein 18 radioactive sources of " 00001 " to " 10010 " totally 18 corresponding index dials of coding go out source channels, the restraining position coding that " 11111 " rotate clockwise for coding disk (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510707899.5A CN105327455A (en) | 2015-10-27 | 2015-10-27 | Nuclide after-loading therapy equipment channel selection system |
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| CN201510707899.5A CN105327455A (en) | 2015-10-27 | 2015-10-27 | Nuclide after-loading therapy equipment channel selection system |
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| CN105327455A true CN105327455A (en) | 2016-02-17 |
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| CN201510707899.5A Pending CN105327455A (en) | 2015-10-27 | 2015-10-27 | Nuclide after-loading therapy equipment channel selection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543566A (en) * | 2016-08-24 | 2018-01-05 | 沃瑞克数控机床(上海)有限公司 | A kind of detection means of rotary part |
| CN109395259A (en) * | 2018-12-25 | 2019-03-01 | 山东新华医疗器械股份有限公司 | A kind of afterloader |
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| CN1147410A (en) * | 1995-10-10 | 1997-04-16 | 戴强 | Multimedia numerically-controlled gamma ray therapeutic instrument |
| CN1190602A (en) * | 1997-02-14 | 1998-08-19 | 王力平 | Device for correcting operation accumulative error of rear installed radiation source |
| CN2907757Y (en) * | 2006-05-30 | 2007-06-06 | 山东新华医疗器械股份有限公司 | Integrated after loading therapeutic machine |
| CN103418089A (en) * | 2013-08-16 | 2013-12-04 | 天津大学 | Indexing head mechanism of high-dose-rate multi-channel after-loading therapy apparatus |
| CN104511097A (en) * | 2014-12-22 | 2015-04-15 | 天津大学 | High-dosage multi-channel index head mechanism of after-loading therapy equipment |
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2015
- 2015-10-27 CN CN201510707899.5A patent/CN105327455A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1066990A (en) * | 1991-05-18 | 1992-12-16 | 王力平 | Radiotherapy and thermotherapy integrated therapeutic method and device thereof |
| CN1147410A (en) * | 1995-10-10 | 1997-04-16 | 戴强 | Multimedia numerically-controlled gamma ray therapeutic instrument |
| CN1190602A (en) * | 1997-02-14 | 1998-08-19 | 王力平 | Device for correcting operation accumulative error of rear installed radiation source |
| CN2907757Y (en) * | 2006-05-30 | 2007-06-06 | 山东新华医疗器械股份有限公司 | Integrated after loading therapeutic machine |
| CN103418089A (en) * | 2013-08-16 | 2013-12-04 | 天津大学 | Indexing head mechanism of high-dose-rate multi-channel after-loading therapy apparatus |
| CN104511097A (en) * | 2014-12-22 | 2015-04-15 | 天津大学 | High-dosage multi-channel index head mechanism of after-loading therapy equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107543566A (en) * | 2016-08-24 | 2018-01-05 | 沃瑞克数控机床(上海)有限公司 | A kind of detection means of rotary part |
| CN109395259A (en) * | 2018-12-25 | 2019-03-01 | 山东新华医疗器械股份有限公司 | A kind of afterloader |
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