阅读说明：本技术 一种后装机出源长度检测装置 (After-loading machine goes out source length detection device ) 是由 赵峰 徐向东 徐翔 徐艳平 于 2020-08-04 设计创作，主要内容包括：本发明公开了一种后装机出源长度检测装置,包括：直线进给机构、挂载于所述直线进给机构且用以跟随放射源进给或回退的摄像装置、进给控制机构和设置在所述摄像装置下方的刻度尺；所述进给控制机构用以连接后装机控制计算机以根据获取放射源的步进长度控制所述摄像装置进给或回退相同长度。本发明所提供的后装机出源长度检测装置通过直线进给机构带动摄像装置跟随放射源同步移动,能够检测多个测点及步进长度,避免检测人员多次出入机房接触放射源,提高了检测的便利性和安全性。(The invention discloses a source-outlet length detection device of a rear loader, which comprises: the device comprises a linear feeding mechanism, a camera device which is mounted on the linear feeding mechanism and used for feeding or retracting along with a radioactive source, a feeding control mechanism and a graduated scale arranged below the camera device; the feeding control mechanism is connected with a back loading control computer to control the camera device to feed or retreat by the same length according to the stepping length of the obtained radioactive source. The post-installation machine source-outlet length detection device provided by the invention drives the camera device to move synchronously along with the radioactive source through the linear feeding mechanism, can detect a plurality of measuring points and step lengths, avoids the situation that detection personnel repeatedly come in and go out of a machine room to contact the radioactive source, and improves the convenience and safety of detection.)

1. A afterloader source exit length detection device, comprising: the radioactive source feeding device comprises a linear feeding mechanism, a camera device (11) which is mounted on the linear feeding mechanism and used for feeding or retracting along with a radioactive source, a feeding control mechanism (10) and a graduated scale (4) which is arranged below the camera device (11); the feeding control mechanism (10) is connected with a back loading control computer (01) to control the camera device (11) to feed or retract the same length according to the stepping length of the obtained radioactive source.

2. The after-loading machine sourcing length detection device of claim 1, characterized in that the linear feeding mechanism comprises a bottom plate (1), a first frame (2) and a second frame (3) which are vertically and fixedly connected with the bottom plate (1) and are arranged in parallel, a driving motor (5) fixed on the side of the first frame (2), and a ball screw (7) which is connected between the first frame (2) and the second frame (3) and is rotatably connected with the driving motor (5); the imaging device (11) is mounted on the ball screw (7).

3. The afterloader exit-source length detection device according to claim 2, characterized in that the feed control mechanism (10) is a single chip microcomputer.

4. The afterloader outfeed length detection device according to claim 2, characterized in that said first frame (2) is provided with an encoder (6) for detecting the rotation angle of said drive motor (5), said encoder (6) being connected to said feed control mechanism (10).

5. The after-loading machine sourcing length detection device according to claim 4, characterized in that the drive motor (5) is a DC motor.

6. The after-loading machine sourcing length detecting device according to claim 4, characterized in that the first frame (2) is fixed with a first limit switch (8) and/or the second frame (3) is fixed with a second limit switch (9);

when the radioactive source reaches the second limit switch (9), the driving motor (5) is electrically conducted to drive the camera device (11) to feed along with the radioactive source; when the radioactive source reaches the first limit switch (8), the driving motor (5) drives the camera device (11) to reset.

7. The afterloader exit-source length detection device according to claim 6, characterized in that the zero graduation mark of the graduated scale (4) is disposed flush with the second limit switch (9).

8. The after-installation Source-out Length detection device according to claim 7, characterized in that the drive motor (5), the encoder (6) and the ball screw (7) are geared together.

Technical Field

The invention relates to the field of medical equipment detection, in particular to a source outlet length detection device of a rear loading machine.

Background

When the after-loading machine is applied in a hospital, whether the source length meets the national standard requirement or not is detected regularly; the source-out length refers to the distance the radioactive source has traveled after exiting the afterloader. Hospitals with after-loading machines must carry out daily, weekly, monthly or annual inspections. In the monthly test project of the after-loading machine, two important indexes are provided: maximum transfer distance and step accuracy. Multiple detections of the afterloader step size are required. The movement of the radioactive source is intermittent step by step, and the moving distance of each step is the step length. For safety reasons, the source-out length of the radioactive source cannot be observed directly with the naked eye, but only indirectly by means of images. There is no detection device designed for afterloading machine separately in the market at present. Most of the existing methods adopted by hospitals are that a camera is used for checking one point, the computer room is needed to be put in every point for detection, the risk of contacting a radioactive source for many times exists for detection personnel, and the detection is extremely inconvenient.

How to solve the problem that the detection of the source length of the post-installation machine is inconvenient and the improvement of the detection safety becomes a technical problem to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to provide a source-outlet length detection device of an after-loading machine, which can acquire a plurality of measuring points and step lengths, prevent detection personnel from entering and exiting a machine room for many times to contact a radioactive source, and improve the convenience and safety of detection.

To achieve the above object, the present invention provides a afterloader discharge length detecting device, comprising: the device comprises a linear feeding mechanism, a camera device which is mounted on the linear feeding mechanism and used for feeding or retracting along with a radioactive source, a feeding control mechanism and a graduated scale arranged below the camera device; the feeding control mechanism is connected with a back loading control computer to control the camera device to feed or retreat by the same length according to the stepping length of the obtained radioactive source.

Optionally, the linear feeding mechanism includes a bottom plate, a first frame and a second frame which are vertically and fixedly connected to the bottom plate and arranged in parallel to each other, a driving motor fixed to a side of the first frame, and a ball screw connected between the first frame and the second frame and rotatably connected to the driving motor; the camera device is mounted on the ball screw.

Optionally, the feeding control mechanism is a single chip microcomputer.

Optionally, the first frame is provided with an encoder for detecting the rotation angle of the driving motor, and the encoder is connected with the feeding control mechanism.

Optionally, the drive motor is a dc motor.

Optionally, a first limit switch is fixed on the first frame, and/or a second limit switch is fixed on the second frame;

when the radioactive source reaches the second limit switch, the driving motor is electrically conducted to drive the camera device to feed along with the radioactive source; when the radioactive source reaches the first limit switch, the driving motor drives the camera device to reset.

Optionally, the zero graduation line of the graduated scale is arranged flush with the second limit switch.

Alternatively, the drive motor, the encoder and the ball screw are engaged by gears.

Compared with the prior art, the source-exiting length detection device of the after-loading machine is connected with the after-loading machine control computer by the aid of the feeding control mechanism, so that a step length instruction sent to a radioactive source of the after-loading machine by the after-loading machine control computer is obtained, the step length information is used for controlling the linear feeding mechanism to drive the camera device to feed along with the radioactive source, the camera device can be matched with the graduated scale to test multiple step lengths, detection personnel do not need to enter and exit a machine room for multiple times, detection convenience and safety are improved, the camera device can be transmitted to the after-loading machine control computer through a cable, the detection personnel can observe the source-exiting length and the residence step length of the radioactive source on a screen, image data are stored through videos or pictures, and tracing is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a working schematic diagram of an after-installation source length detection device provided by an embodiment of the invention;

FIG. 2 is a front view of the source length detection device of the after-loading machine;

FIG. 3 is a side view of the source-out length detection device of the after-loading machine;

fig. 4 is a plan view of the post-installation source-outlet length detection device.

Wherein:

01-rear loading control computer, 1-bottom plate, 2-first frame, 3-second frame, 4-graduated scale, 5-driving motor, 6-encoder, 7-ball screw, 8-first limit switch, 9-second limit switch, 10-feeding control mechanism and 11-camera device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 4, fig. 1 is a schematic diagram illustrating an operation of a source length detection device of an after-loading machine according to an embodiment of the present invention, fig. 2 is a front view of the source length detection device of the after-loading machine, fig. 3 is a side view of the source length detection device of the after-loading machine, and fig. 4 is a top view of the source length detection device of the after-loading machine.

The principle of the source-outlet length detection device of the after-loading machine provided by the invention is shown in fig. 1, the after-loading machine is connected with an after-loading machine control computer 01 through a feeding control mechanism 10, a step length instruction sent to a radioactive source of the after-loading machine by the after-loading machine control computer 01 is obtained, so that a linear feeding mechanism is controlled to drive a camera device 11 to feed for the same distance along with the radioactive source, the camera device 11 can be matched with a graduated scale 4 to test a plurality of step lengths, detection personnel do not need to get in and out of a machine room for multiple times, the detection convenience and safety are improved, and videos or pictures shot by the camera device 11 can be transmitted to the after-loading machine.

It should be noted that the step length instruction issued by the afterloader control computer 01 to the radiation source of the afterloader is not necessarily equal to the actual feeding length of the radiation source, and the actual step length of the radiation source is detected by the camera device 11, so that it can be detected whether the afterloader meets the relevant standard and correct the actual step length of the radiation source, so that the error between the actual step length and the step length corresponding to the control instruction issued by the afterloader control computer 01 is within the preset range.

The post-installation source-emergence length detection device provided by the invention is described in more detail below by combining the drawings and specific embodiments.

In an alternative embodiment provided by the present invention, the arrangement of the post-installation source-exiting length detecting device and the linear feeding mechanism thereof is as shown in fig. 2 to 4, the linear feeding mechanism includes a bottom plate 1, and a first frame 2 and a second frame 3 vertically fixed at two ends of the bottom plate 1, the first frame 2 and the second frame 3 being arranged in parallel; scale 4 is fixed on bottom plate 1, and connect ball 7 between first frame 2 and the second frame 3, through fixing and being connected with ball 7 at first frame 2 or 3 driving motor 5 of second frame, turn into linear motion with driving motor 5's rotary motion through ball 7, camera device 11 carries on ball 7 and camera device 11 sets up towards scale 4, ensure that the radiation source of back installation lies in between camera device 11 and scale 4 just when stepping, be convenient for camera device 11 records the scale that the different point radiation source corresponds, in order to obtain actual step length.

In the detection process, the afterloading control computer 01 sends a step instruction to the reflection source driving motor 5, the radioactive source steps by a corresponding length according to a preset instruction, and at the moment, the radioactive source extends out of the afterloading machine and moves between the graduated scale 4 and the camera device 11; meanwhile, the feeding control device acquires a step command sent by the back-loading control computer 01, and controls the driving motor 5 to rotate so as to drive the camera device 11 to move by the same length as the step command through the ball screw 7. Because the feeding length of the camera device 11 is basically the same as the stepping length of the radioactive source, after each stepping, the connecting line of the camera device 11 and the radioactive source is completely or approximately completely vertical to the graduated scale 4, so that the corresponding scales of the radioactive source after multiple steps can be accurately read, and the stepping length of the radioactive source can be measured.

It should be noted that the core of the present application lies in that the camera device 11 follows the radioactive source for synchronous feeding, so as to conveniently and accurately obtain the scales corresponding to a plurality of positions of the radioactive source, and measure the actual stepping length. The arrangement of the linear feeding mechanism is not limited to the above-mentioned embodiment, that is, the linear mechanism not only can adopt the driving motor 5 and the ball screw 7 to cooperate to drive the camera device 11 to perform linear feeding, but also can adopt the linear guide rail and the linear motor to mount the camera device 11 on the linear motor, and the feeding control mechanism 10 controls the movement of the linear motor to drive the camera device 11 to follow the radioactive source to perform synchronous feeding. The drive motor 5 is typically a dc motor. In addition, the linear feeding mechanism can be flexibly arranged by referring to the prior art, and the linear feeding mechanism which drives the camera device 11 to follow the radioactive source to feed all falls into the protection scope of the application.

No matter what kind of structure of the linear feeding mechanism is adopted, a certain deviation may exist between the actual feeding amount and the control feeding amount issued by the feeding control mechanism 10, and the detection and correction are required to be carried out regularly, because the camera device 11 is mounted on the linear feeding mechanism, no radioactive source exists, and the like, the measurement and correction can be carried out manually by a detection person, the feeding control mechanism 10 can adopt a single chip microcomputer or an industrial personal computer, and the like according to the requirements, and the feeding control mechanism 10 which can obtain a stepping instruction and control the driving motor 5 or the linear motor is within the protection scope of the application.

In order to optimize the above embodiment, the device for detecting the source-out length of the after-loading machine further comprises an encoder 6, wherein the encoder 6 is connected with the driving motor 5 and the feeding control mechanism 10 and is used for detecting the rotation angle information of the driving motor 5 and feeding the rotation angle information back to the feeding control mechanism 10, so that the rotation angle deviation of the driving motor 5 is corrected, and the detection precision is improved. The driving motor 5 and the ball screw 7 may be directly connected by a coupling or may be connected by a transmission mechanism such as a gear. In the specific embodiment shown in fig. 4, the encoder 6 and the ball screw 7 are separately arranged on both sides of the driving motor 5, the output shaft of the driving motor 5 penetrates the inner side of the first frame 2, a gear is arranged on the output shaft, and both the encoder 6 and the ball screw 7 are engaged with the gear of the driving motor 5 through the gear.

In the actual detection process, the detection of the source length of the after-loading machine is generally carried out by stepping and shrinking the radiation source from the maximum extension length to the after-loading machine. Correspondingly, in the embodiment provided by the invention, the second rack 3 is provided with a second limit switch 9, during detection, the side of the first rack 2 is arranged close to the rear loader, the radioactive source is controlled to reach the maximum extension length, namely the second rack 3, and the camera device 11 is also positioned at one end of the second rack 3. After the second limit switch 9 detects that the radioactive source is in place, the driving motor 5 of the linear feeding mechanism is electrically conducted, and when the radioactive source retracts in a stepping mode, the driving motor 5 drives the camera device 11 to move synchronously towards the first rack 2 along with the radioactive source.

Further, first limit switch 8 is also arranged at first frame 2, first limit switch 8 is also used for detecting the position of the radioactive source, and when the radioactive source reaches first frame 2 and touches first limit switch 8, driving motor 5 rotates in the opposite direction, driving camera device 11 to reset to second frame 3. In this embodiment, since the radiation source is used for detecting the step length in the retraction process, the scale 4 is set in a manner that the zero scale line is flush with the second limit switch 9. Obviously, the not only length detection of radiation source is through two scale difference readings, scale 4 set up the direction and just play the effect of making things convenient for the reading, in the testing process of difference, if adopt the radiation source to detect from minimum extension length to maximum extension length's in-process, scale 4's zero scale mark can also set up with 8 parallel and level of first limit switch, can also adopt two sets of scale increase opposite direction's scale 4 to set up simultaneously at bottom plate 1, conveniently adopt different detection mode to detect. The driving motor 5 may be provided not only at the first frame 2 but also at the second frame 3 as long as the encoder 6 can detect the rotation angle information of the driving motor 5 as long as the encoder 6 and the driving motor 5 are kept provided at the same frame.

The utility model provides a back installation length detection device that comes out source need not work personnel and frequently gets into the computer lab, has both reached the purpose that detects, has reduced the injury of radiation to the human body again, and has improved the convenience and the detection efficiency who detect.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The post-installation source-outlet length detection device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.