CN212645628U - Displacement monitoring device of multi-leaf grating blade - Google Patents
Displacement monitoring device of multi-leaf grating blade Download PDFInfo
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- CN212645628U CN212645628U CN202021855130.0U CN202021855130U CN212645628U CN 212645628 U CN212645628 U CN 212645628U CN 202021855130 U CN202021855130 U CN 202021855130U CN 212645628 U CN212645628 U CN 212645628U
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Abstract
The utility model discloses a displacement monitoring device of a multi-blade grating blade, which comprises a linear motor set used for driving the multi-blade grating and a monitoring mechanism used for monitoring the displacement of the multi-blade grating; the monitoring mechanism comprises a monitoring circuit board, a resistance strain type detection mechanism which is arranged on the blade guide frame and is in sliding fit with the multi-blade grating, and a linear motor position detection device which is arranged on the linear motor set. The utility model discloses a set up whether displacement monitoring mechanism can real-time supervision leafy grating blade follow linear electric motor synchronous motion, can in time remind operating personnel to overhaul under the unusual condition of leafy grating blade motion, leafy grating blade drives electrically conductive mechanism and is in slide on the resistance strain foil group, make the displacement information of leafy grating blade turn into voltage signal and supply follow-up equipment to gather, reach the purpose of direct detection leafy grating blade displacement, the accuracy of detection is higher, and the testing result is more directly perceived.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, concretely relates to displacement monitoring device of leafy grating blade.
Background
The multi-leaf grating is a core enabling component in the radiotherapy equipment and mainly plays a role in conforming and strengthening X-rays so as to kill tumor cells to the maximum extent and protect surrounding normal tissues. The multi-blade grating comprises a plurality of tungsten alloy blades which are arranged, and each blade is connected with a corresponding driving mechanism, a transmission mechanism, a position sensor and a driving control system and can move independently. Specifically, the drive control system controls the drive mechanism and pushes the tungsten alloy blade to move to a specified position through the transmission mechanism; the tungsten alloy blades can form a specific shape which is similar to the shape of a target area of a tumor of a patient, so that the purposes of conforming to and strengthening X-rays are achieved. In the existing equipment, the driving mechanism for providing power for each blade of the multi-blade grating mainly comprises three types, namely a rotary motor, a cylinder and a linear motor. Because linear electric motor compares cylinder positioning accuracy height, compares that rotating electrical machines moves velocity height, acceleration is big, consequently receives industry more and more attention.
At present, a method for indirectly detecting the driving information of a driving motor is mostly adopted to obtain the displacement information of the multi-leaf grating, and the detection precision of a motor displacement detection element (such as a rotary encoder and a Hall sensor) is not high, so that the displacement information acquisition of the multi-leaf grating is not accurate, the control precision of the leaf is reduced, the use requirement of the multi-leaf grating cannot be met, and the treatment time of a patient is correspondingly prolonged. Meanwhile, at present, no special device can intuitively know whether the multi-leaf grating blade and the motor synchronously move or not, namely whether the multi-leaf grating blade is in place or not under the control of the motor. In addition, due to the development requirement of miniaturization of the existing radiotherapy equipment, the multi-leaf grating blade and the motor driving mechanism, the transmission mechanism and the displacement detection mechanism thereof need to be installed in a narrow space, and the volume of the device is greatly limited. Therefore, a monitoring device which has a compact structure and can accurately and directly detect the displacement of the multi-leaf collimator blade and judge whether the movement of the multi-leaf collimator blade is in place or not is needed to be designed and manufactured so as to ensure the position detection precision of the multi-leaf collimator blade and further better ensure the movement precision of the multi-leaf collimator blade.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that whether not enough among the above-mentioned prior art is directed against, provide a displacement monitoring device of leafy grating blade, can real-time supervision leafy grating blade follow linear electric motor synchronous motion through setting up displacement monitoring mechanism, can in time remind operating personnel to overhaul under the unusual circumstances of leafy grating blade motion, leafy grating blade drives electrically conductive mechanism and is in slide on the resistance strain gauge group, make leafy grating blade's displacement information turn into voltage signal and supply follow-up equipment to gather, reach the purpose of directly detecting leafy grating blade displacement, the accuracy of detection is higher, and the testing result is more directly perceived.
In order to solve the technical problem, the utility model discloses a technical scheme is: a displacement monitoring device of a multi-blade grating blade is characterized in that: the linear motor set is used for driving the multi-blade grating and the monitoring mechanism is used for monitoring the displacement of the multi-blade grating; the monitoring mechanism comprises a monitoring circuit board, a resistance strain type detection mechanism which is arranged on the blade guide frame and is in sliding fit with the multi-blade grating, and a linear motor position detection device which is arranged on the linear motor set; the resistance strain type detection mechanism comprises a shell arranged on the blade guide frame, a resistance strain sheet group arranged in the shell and a conductive mechanism driven by the multi-leaf grating and sliding on the resistance strain sheet group; the monitoring circuit board is integrated with a microcontroller, an audible and visual alarm and a display, the audible and visual alarm and the display are both connected with the microcontroller, and the resistance strain gauge group and the linear motor position detection device are both connected with the microcontroller.
The displacement monitoring device for the multi-leaf grating blade is characterized in that: the multi-blade grating comprises a plurality of multi-blade grating blades, and the linear motor group comprises a plurality of linear motors; the conducting mechanism comprises a plurality of electric brushes in sliding fit with the resistance strain gauge groups and a plurality of sliders for connecting the electric brushes and the multi-leaf collimator blades, the number of the linear motors, the number of the multi-leaf collimator blades, the number of the electric brushes and the number of the sliders are the same and are in one-to-one correspondence, one end of each slider, far away from the electric brushes, penetrates through the shell and is fixedly connected with the corresponding blade, and a guide groove is formed in the position, matched with the sliders, of the shell.
The displacement monitoring device for the multi-leaf grating blade is characterized in that: the resistance strain gauge group comprises a plurality of resistance strain gauges which are sequentially and transversely arranged on the top surface inside the shell, the resistance strain gauges are connected with the microcontroller, and the number of the resistance strain gauges is the same as that of the electric brushes and corresponds to that of the electric brushes one by one.
The displacement monitoring device for the multi-leaf grating blade is characterized in that: be provided with a plurality of response chambeies in the casing, adjacent two be provided with the baffle that is used for cutting apart the casing between the response chamber, resistance foil gage group includes a plurality of resistance foil gage units, resistance foil gage unit sets up the response intracavity and will the response chamber is cut apart into two half response chambeies, the quantity of resistance foil gage unit with the same and the one-to-one in quantity in response chamber, resistance foil gage unit includes that two are vertical laying the resistance foil gage in the response intracavity, the brush setting in half response intracavity and with resistance foil gage sliding fit.
The displacement monitoring device for the multi-leaf grating blade is characterized in that: the position matched with the sliding block on the partition plate and the position matched with the sliding block on the side wall of the shell are both provided with a limiting sliding groove for the sliding block to move, and the position matched with the limiting sliding groove on the sliding block is provided with a guide block.
The displacement monitoring device for the multi-leaf grating blade is characterized in that: the multi-blade grating blade is connected with the linear motor through a connecting rod.
The displacement monitoring device for the multi-leaf grating blade is characterized in that: the linear motor position detection device comprises a plurality of linear Hall elements, the number of the linear Hall elements is the same as that of the linear motors, the linear Hall elements correspond to the linear motors one by one, and the linear Hall elements are connected with the microcontroller.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses a set up displacement monitoring mechanism and can whether follow linear electric motor synchronous motion by real-time supervision leafy grating blade, can in time remind operating personnel to overhaul under the unusual condition of leafy grating blade motion, guarantee the safe operation of device, improve fault location's the degree of accuracy simultaneously to improve the speed of troubleshooting.
2. The utility model discloses a set up resistance strain foil group, the electrically conductive mechanism of multi-leaf grating blade drive slide on the resistance strain foil group, make the displacement information transformation of multi-leaf grating blade voltage signal and supply follow-up equipment to gather, reach the purpose that directly detects multi-leaf grating blade displacement, the accuracy of detection is higher, and the testing result is more directly perceived.
3. The utility model discloses a set up resistance strain gauge group and electrically conductive mechanism in casing 3, make whole device structure compacter, the standard device size of being convenient for satisfies the demand of installing in a narrow and small space, and the installation is effectual.
To sum up, the utility model discloses simple structure can whether follow linear electric motor synchronous motion by real-time supervision leafy grating blade through setting up displacement monitoring mechanism, can in time remind operating personnel to overhaul under the unusual condition of leafy grating blade motion, leafy grating blade drives electrically conductive mechanism and slides on the resistance strain gauge group, makes leafy grating blade's displacement information turn into voltage signal and supply follow-up equipment to gather, reaches the purpose of the displacement of the leafy grating blade of direct detection, and the accuracy of detection is higher, and the testing result is more directly perceived.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a right side view of fig. 1 with the linear motor and the connecting rod removed (with the resistance strain gauge arranged in a transverse direction).
Fig. 3 is a right side view of fig. 1 with the linear motor and the connecting rod removed (with the resistance strain gauge vertically arranged).
Fig. 4 is a schematic block diagram of the circuit of the present invention.
Description of reference numerals:
1-multi-leaf grating blade; 2-a blade guide frame; 3-a shell;
4-an electric brush; 5-a slide block; 6-connecting rod;
7-resistance strain gauge; 8-a separator; 9-a half induction cavity;
10-a linear motor; 11-a guide block; 12-audible and visual alarm;
13-a display; 14-a microcontroller; 15-linear hall element.
Detailed Description
The technical scheme of the utility model is explained in detail through embodiment 1 and implementation 2:
example 1
A displacement monitoring device for a multi-leaf collimator blade as shown in fig. 1, 2 and 4 comprises a linear motor set for driving the multi-leaf collimator and a monitoring mechanism for monitoring the displacement of the multi-leaf collimator; the monitoring mechanism comprises a monitoring circuit board, a resistance strain type detection mechanism which is arranged on the blade guide frame 2 and is in sliding fit with the multi-blade grating, and a linear motor position detection device which is arranged on the linear motor set; the resistance strain type detection mechanism comprises a shell 3 arranged on the blade guide frame 2, a resistance strain sheet group arranged in the shell 3 and a conductive mechanism which is driven by the multi-leaf grating and slides on the resistance strain sheet group; the monitoring circuit board is integrated with a microcontroller 14, an audible and visual alarm 12 and a display 13 which are connected with the microcontroller 14, and the resistance strain gauge group and the linear motor position detection device are connected with the microcontroller 14.
It should be noted that the multi-leaf grating includes 60 multi-leaf grating leaves 1;
in this embodiment, the microcontroller 14 is a C8051F020/2 type microcontroller; the display 13 adopts an LCD screen;
it should be noted that, the displacement information of the linear motor 10 is detected by the linear motor position detection device, the actual displacement information of the multi-leaf grating blade 1 is detected by the resistance strain type detection mechanism, the microcontroller 14 collects the two displacement information and judges whether the actual displacement of the multi-leaf grating blade 1 is equal to the displacement of the linear motor 10, if equal, the multi-leaf grating blade 1 moves normally, if unequal, the audible and visual alarm 12 sends an alarm signal, and the display 13 displays which one of the multi-leaf grating blades 1 moves abnormally, so that the maintenance of subsequent personnel is facilitated;
whether the multi-leaf grating blade 1 synchronously moves along with the linear motor 10 can be monitored in real time by arranging the displacement monitoring mechanism, an operator can be reminded of overhauling in time under the condition that the multi-leaf grating blade 1 abnormally moves, the safe operation of the device is ensured, and meanwhile, the accuracy of fault positioning is improved so as to improve the speed of fault overhauling;
by arranging the resistance strain gauge group, the multi-leaf grating blade 1 drives the conductive mechanism to slide on the resistance strain gauge group, so that displacement information of the multi-leaf grating blade 1 is converted into a voltage signal and is collected by subsequent equipment, the aim of directly detecting the displacement of the multi-leaf grating blade 1 is fulfilled, the detection accuracy is higher, and the detection result is more visual;
through setting up resistance strain foil group and electrically conductive mechanism in casing 3, make whole device structure compacter, the standard device size of being convenient for satisfies the demand of installing in a narrow and small space, and the installation is effectual.
In the embodiment, the multi-blade grating comprises a plurality of multi-blade grating blades 1, and the linear motor group comprises a plurality of linear motors 10; the conducting mechanism comprises a plurality of electric brushes 4 in sliding fit with the resistance strain gauge groups and a plurality of sliders 5 used for connecting the electric brushes 4 with the multi-leaf collimator blades 1, the number of the linear motors 10, the number of the multi-leaf collimator blades 1, the number of the electric brushes 4 and the number of the sliders 5 are the same and are in one-to-one correspondence, one end, far away from the electric brushes 4, of the sliders 5 penetrates through the shell 3 and is fixedly connected with the blades 1, and guide grooves are formed in the positions, matched with the sliders 5, of the shell 3.
In this embodiment, the resistance strain gauge group includes a plurality of resistance strain gauges 7 transversely arranged on the inner top surface of the housing 3 in sequence, the resistance strain gauges 7 are connected with the microcontroller 14, and the number of the resistance strain gauges 7 is the same as that of the electric brushes 4 and corresponds to that of the electric brushes 4.
In the embodiment, the type of the resistance strain gauge 7 is BX120-50 AA;
it should be noted that the brush 4 is a conductive sheet type elastic structure, a head antenna of the brush is in contact with a carbon film on the surface of the resistance strain gauge 7 and slides relatively, and a tail of the brush 4 is fixed on the multi-leaf collimator blade 1 through a slider 5 and moves synchronously with the multi-leaf collimator blade 1, so as to convert position information of the multi-leaf collimator blade 1 into a voltage signal and transmit the voltage signal to the microcontroller 14 for collection.
It should be noted that an insulating medium is arranged between two adjacent resistance strain gauges 7, so that the normal operation of a single resistance strain gauge 7 and the accurate output of an output signal are ensured; a plurality of resistance foil gages 7 transversely lay, can simplify resistance strain formula detection mechanism's structure, and casing 3 can design littleer when actual manufacturing, and the structure is compacter, satisfies the demand of installing in a narrow and small space, and the installation is effectual.
In this embodiment, the multi-leaf collimator blade 1 is connected to the linear motor 10 through the connecting rod 6.
In this embodiment, the linear motor position detecting device includes a plurality of linear hall elements 15, the number of the linear hall elements 15 is the same as that of the linear motors 10, and the linear hall elements 15 are in one-to-one correspondence, and the plurality of linear hall elements 15 are all connected to the microcontroller 14.
In this embodiment, the linear hall element 15 is a UGN3503 type linear hall element manufactured by alloegro corporation.
When the multi-leaf grating displacement detection device is used, the linear motor 10 drives the multi-leaf grating blade 1 to do linear motion, the multi-leaf grating blade 1 drives the electric brush 4 to slide on the resistance strain gauge 7 through the sliding block 5, an antenna at the head of the electric brush 4 is in contact with a carbon film on the surface of the resistance strain gauge 7 and slides relatively, so that the resistance strain gauge 7 is stressed and deformed to generate resistance change, the resistance change is converted into a voltage signal to be transmitted to the microcontroller 14 for collection, namely, position information of the multi-leaf grating blade 1 is converted into the voltage signal to be transmitted to the microcontroller 14 for collection, and the purpose of directly detecting the displacement of the multi-leaf grating blade 1 is achieved; meanwhile, displacement information of the linear motor 10 is detected through the linear Hall element 15, the microcontroller 14 collects the two displacement information and judges whether the actual displacement of the multi-leaf grating blade 1 is equal to that of the linear motor 10 or not, if the actual displacement is equal, the multi-leaf grating blade 1 moves normally, and if the actual displacement is not equal, the audible and visual alarm 12 sends an alarm signal, and the display 13 displays which one of the multi-leaf grating blades 1 moves abnormally, so that subsequent personnel can overhaul the motor conveniently.
Example 2
As shown in fig. 1 and fig. 3, this embodiment is different from embodiment 1 in that a plurality of sensing cavities are provided in the housing 3, two adjacent sensing cavities are provided with a partition plate 8 for dividing the housing 3 therebetween, each resistance strain gauge unit includes a plurality of resistance strain gauge units, the resistance strain gauge units are disposed in the sensing cavities and divide the sensing cavities into two half sensing cavities 9, the number of the resistance strain gauge units is the same as that of the sensing cavities and corresponds to one another, each resistance strain gauge unit includes two resistance strain gauges 7 vertically disposed in the sensing cavities, and the brushes 4 are disposed in the half sensing cavities 9 and are in sliding fit with the resistance strain gauges 7.
It should be noted that the sensing cavity is arranged to separate the plurality of resistance strain gauge units, so that accurate transmission of signals is ensured, and the anti-interference capability is stronger.
In this embodiment, the position on the partition plate 8 matched with the sliding block 5 and the position on the side wall of the shell 3 matched with the sliding block 5 are both provided with a limiting sliding groove for the sliding block 5 to move, and the position on the sliding block 5 matched with the limiting sliding groove is provided with a guide block 11.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (7)
1. A displacement monitoring device of a multi-blade grating blade is characterized in that: the linear motor set is used for driving the multi-blade grating and the monitoring mechanism is used for monitoring the displacement of the multi-blade grating; the monitoring mechanism comprises a monitoring circuit board, a resistance strain type detection mechanism which is arranged on the blade guide frame (2) and is in sliding fit with the multi-blade grating, and a linear motor position detection device which is arranged on the linear motor set; the resistance strain type detection mechanism comprises a shell (3) arranged on a blade guide frame (2), a resistance strain sheet group arranged in the shell (3), and a conductive mechanism driven by the multi-blade grating and sliding on the resistance strain sheet group; the monitoring circuit board is integrated with a microcontroller (14), an audible and visual alarm (12) and a display (13), the audible and visual alarm and the display are both connected with the microcontroller (14), and the resistance strain gauge group and the linear motor position detection device are both connected with the microcontroller (14).
2. A device for monitoring the displacement of a multiple leaf grating blade according to claim 1, wherein: the multi-blade grating comprises a plurality of multi-blade grating blades (1), and the linear motor group comprises a plurality of linear motors (10); the conducting mechanism comprises a plurality of electric brushes (4) in sliding fit with the resistance strain gauge groups and a plurality of sliders (5) used for connecting the electric brushes (4) and the multi-leaf grating blades (1), the number of the linear motors (10), the number of the multi-leaf grating blades (1), the number of the electric brushes (4) and the number of the sliders (5) are identical and are in one-to-one correspondence, one end, far away from the electric brushes (4), of the sliders (5) penetrates through the shell (3) and is fixedly connected with the blades (1), and guide grooves are formed in the positions, matched with the sliders (5), of the shell (3).
3. A device for monitoring the displacement of a multiple leaf grating blade according to claim 2, wherein: the resistance strain gage group comprises a plurality of resistance strain gages (7) which are sequentially and transversely arranged on the inner top surface of the shell (3), the resistance strain gages (7) are connected with the microcontroller (14), and the number of the resistance strain gages (7) is the same as that of the electric brushes (4) and corresponds to that of the electric brushes (4).
4. A device for monitoring the displacement of a multiple leaf grating blade according to claim 2, wherein: be provided with a plurality of response chambeies in casing (3), adjacent two be provided with baffle (8) that are used for cutting apart casing (3) between the response chamber, resistance foil gage group includes a plurality of resistance foil gage units, resistance foil gage unit sets up the response intracavity and will the response chamber is cut apart into two and half response chamber (9), the quantity of resistance foil gage unit with the same and the one-to-one in quantity in response chamber, resistance foil gage unit includes that two are vertical laying up resistance foil gage (7) in the response intracavity, brush (4) set up in half response chamber (9) and with resistance foil gage (7) sliding fit.
5. A device for monitoring the displacement of a multiple leaf grating blade according to claim 4, wherein: the position matched with the sliding block (5) on the partition plate (8) and the position matched with the sliding block (5) on the side wall of the shell (3) are provided with limiting sliding grooves for the sliding block (5) to move, and the position matched with the limiting sliding grooves on the sliding block (5) is provided with a guide block (11).
6. A device for monitoring the displacement of a multiple leaf grating blade according to claim 1, wherein: the multi-leaf grating blade (1) is connected with the linear motor (10) through a connecting rod (6).
7. A device for monitoring the displacement of a multiple leaf grating blade according to claim 1, wherein: the linear motor position detection device comprises a plurality of linear Hall elements (15), the number of the linear Hall elements (15) is the same as that of the linear motors (10), the linear Hall elements correspond to the linear motors one by one, and the linear Hall elements (15) are connected with a microcontroller (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021855130.0U CN212645628U (en) | 2020-08-31 | 2020-08-31 | Displacement monitoring device of multi-leaf grating blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021855130.0U CN212645628U (en) | 2020-08-31 | 2020-08-31 | Displacement monitoring device of multi-leaf grating blade |
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| CN212645628U true CN212645628U (en) | 2021-03-02 |
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| CN202021855130.0U Active CN212645628U (en) | 2020-08-31 | 2020-08-31 | Displacement monitoring device of multi-leaf grating blade |
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