CN117259347A - Beam cleaning structure and control method - Google Patents

Abstract

The invention provides a light beam cleaning structure and a control method, comprising the following steps: a cleaning assembly, the cleaning assembly comprising: the laser light source is used for emitting light beams; the light spot assembly comprises a third wedge mirror and a fourth wedge mirror which are arranged at intervals; the light spot assembly is used for receiving the light beam emitted by the laser light source and forming an annular cleaning light spot for cleaning the inner wall surface of the accommodating cavity; the focusing module is positioned between the laser light source and the light spot assembly to adjust the focal length of the light beam entering the light spot assembly; the wedge mirror assembly is used for enabling the cleaning light beam to enter the accommodating cavity after being refracted through the wedge mirror assembly and irradiate the inner wall surface of the accommodating cavity; the wedge lens assembly comprises a first wedge lens and a second wedge lens; the wedge mirror assembly is connected with an output shaft of the driving motor to drive the wedge mirror assembly to rotate, so that the irradiation direction of the cleaning light beam passing through the wedge mirror assembly is adjusted. The beam cleaning structure and the control method solve the technical problem that the inner wall of the container is difficult to clean in the related technology.

Description

A beam cleaning structure and control method

Technical field

The invention relates to the technical field of container detection, and in particular to a beam cleaning structure and a control method. .

Background technique

Uranium hexafluoride is a basic nuclear material and is widely used in uranium enrichment and turnover. With the rapid development of the nuclear power industry, the production of uranium hexafluoride has increased year by year, and the usage and processing tasks of its uranium hexafluoride containers have also increased rapidly. Uranium hexafluoride containers are generally closed hollow containers, with a "right angle valve" and a "plug" at both ends of the container as the inlet of the container.

According to industry standards, when there is any situation such as "regular inspection and experimentation of containers; the remaining amount of empty containers exceeding the standard; changes in the variety (abundance) of container fillings; maintenance of containers; excessive radiation dose rate on the surface of the container", etc. Every time, uranium hexafluoride containers need to be cleaned and inspected. Those that pass the inspection are reused, and those that fail are scrapped and sent to temporary storage.

Inspection of the cleaned uranium hexafluoride container requires a comprehensive inspection of the internal surface (inner wall) of the container. According to industry standards: the interior of the container should be clean, dry, and free of any contaminants; no corrosion is allowed on the visible surface of the valve channel. Traces, green spots, sediment, moisture, scratches and white alkaline substances, etc.

Laser cleaning is a physical removal method that forms gaseous particles and solid waste without the generation of waste liquid. However, the two inlets of the uranium hexafluoride container (right-angle valve and plug) are both Z1” conical threaded interfaces, and their structure is a through hole with a very small diameter. The existing laser cleaning system is difficult to install due to its structural size limitations. Laser cleaning inside the container cannot be achieved through such a small entrance. In addition, there is also a risk of contamination when entering the interior of the container.

In summary, with the massive increase in the number of uranium hexafluoride containers to be cleaned, existing cleaning devices and methods are unable to meet the demand in terms of economy, environmental protection, cleaning efficiency and safety.

Contents of the invention

The purpose of the present invention is to overcome the above technical deficiencies and provide a beam cleaning structure and control method to solve the technical problem of difficulty in cleaning the inner wall of the container in related technologies.

In order to achieve the above technical objectives, the present invention adopts the following technical solution: a beam cleaning structure, including: a container, the container has a containing cavity and a container mouth connected with the containing cavity; the container mouth includes a first container mouth and a second container mouth arranged oppositely. Container mouth; cleaning component, the cleaning component is connected to the container, the cleaning component includes: a laser light source, the laser light source is used to emit a light beam; the light spot component includes a third wedge mirror and a fourth wedge mirror arranged at intervals; the light spot component is used to Receive the beam emitted by the laser light source and form an annular cleaning spot for cleaning the inner wall of the accommodation cavity; a focusing module, which is located between the laser source and the spot component to adjust the focal length of the beam entering the spot component; The wedge mirror assembly is arranged corresponding to the container mouth, so that after the cleaning beam is refracted by the wedge mirror assembly, it enters the accommodation cavity and irradiates the inner wall surface of the accommodation cavity; the wedge mirror assembly includes a first wedge mirror and a second wedge mirror Mirror; drive motor, the wedge mirror assembly is connected with the output shaft of the drive motor to drive the wedge mirror assembly to rotate, thereby adjusting the irradiation direction of the cleaning beam passing through the wedge mirror assembly.

Further, the first wedge mirror includes a first incident surface and a first exit surface; the second wedge mirror includes a second incident surface and a second exit surface; the first exit surface and the second incident surface are arranged parallel to each other; the driving motor includes The first drive motor and the second drive motor; the output shaft of the first drive motor is connected to the first wedge mirror, and the output shaft of the second drive motor is connected to the second wedge mirror.

Further, the beam cleaning structure also includes an adapter barrel; the adapter barrel is connected to the first container mouth and/or the second container mouth; a window piece is provided on the adapter barrel, and the window piece is a cylindrical structure, and the axis of the window piece is connected with the first container mouth. The rotation axes of the second wedge mirrors coincide with each other.

Further, the beam cleaning structure also includes: a range finder. The range finder is used to emit a ranging beam into the accommodation cavity. After the ranging beam passes through the inner wall, it is emitted from the container mouth. The range finder is based on the measurement beam emitted from the container mouth. The distance information is obtained from the light beam, so that the focusing module adjusts the focal length of the light beam entering the light spot component according to the distance information.

Further, the beam cleaning structure also includes: a control module. The control module is connected to the rangefinder signal. The control module calculates based on the distance information to obtain the focal length information, and transmits the focal length information to the focusing module to adjust the focus. The module adjusts the focal length based on the focal length information.

Further, the beam cleaning structure also includes a detection component, which is connected to the container. The detection component includes: an illumination component for emitting an illumination beam into the accommodation cavity; and an imaging component for receiving illumination reflected by the inner wall of the accommodation cavity. The light beam forms an image of the inner wall surface according to the illumination light beam; the focusing lens is connected to the control module signal to adjust the focal length of the illumination light beam.

Further, the beam cleaning structure includes cleaning the dichroic mirror, and the cleaning dichroic mirror includes: cleaning the dichroic mirror incident surface, for causing the illumination beam and the ranging beam to penetrate the cleaning dichroic mirror through the cleaning dichroic mirror incident surface; cleaning the dichroic mirror exit surface, and The incident surfaces of the cleaning dichroic mirror are arranged oppositely, and the exit surface of the cleaning dichroic mirror causes the cleaning beam to be refracted through the exit surface of the cleaning dichroic mirror before reaching the wedge mirror assembly.

Further, the beam cleaning structure includes a first dichromatic mirror, which is located on the side of the cleaning dichromatic mirror away from the wedge mirror assembly; the first dichromatic mirror includes: a first dichromatic mirror incident surface; a first dichromatic mirror exit surface, for The illumination beam refracted by the inner wall of the container penetrates the first dichroic mirror through the first dichroic mirror exit surface. The first dichroic mirror exit surface is used to reflect the ranging beam through the first dichroic mirror exit surface before reaching the cleaning dichroic mirror. mirror.

Further, the beam cleaning structure includes a second dichroic mirror, and the second dichroic mirror includes: a second dichroic mirror incident surface, for allowing the illumination beam to penetrate the second dichroic mirror through the second dichroic mirror incident surface; and the second dichroic mirror exit surface. , used to make the ranging beam reach the first dichroic mirror exit surface after being refracted through the second dichroic mirror exit surface.

Further, the beam cleaning structure includes: a first filter located between the first dichroic mirror and the focusing lens to filter the illumination beam; a second filter located between the first dichroic mirror and the focusing lens; between the second dichromatic mirror and the rangefinder to filter the rangefinder beam.

Further, the third wedge mirror includes a third incident surface and a third exit surface; the fourth wedge mirror includes a fourth incident surface and a fourth exit surface; the third exit surface and the fourth incident surface are arranged parallel to each other; the driving motor includes The third drive motor and the fourth drive motor; the output shaft of the third drive motor is connected to the third wedge mirror, and the output shaft of the fourth drive motor is connected to the fourth wedge mirror; the rotation speeds of the third drive motor and the fourth drive motor are the same. .

A control method, suitable for the beam cleaning structure of any of the above, the control method includes: driving the third wedge mirror and the fourth wedge mirror of the spot assembly of the beam cleaning structure to rotate at the same rotation speed, thereby forming an annular Cleaning beam; driving the first wedge mirror and the second wedge mirror of the wedge mirror assembly of the beam cleaning structure to rotate at different rotational speeds, so that the cleaning light spot moves along a spiral on the inner wall of the container to clean the inner wall of the container.

Beneficial effects:

1. The beam cleaning structure and control method of the present invention adopts a laser control method to realize laser cleaning of uranium hexafluoride containers without the generation of liquid wastewater. The gaseous and solid wastes generated are easy to recycle and utilize, with simple structure and high cleaning efficiency. High, low waste disposal cost, economical and environmentally friendly.

2. The beam cleaning structure and control method of the present invention adopts pulse light source, light spot component, double wedge mirror scanning, active illumination, laser ranging, dynamic focusing and imaging methods to achieve full coverage scanning laser cleaning of the inner wall of the container, making the entire system It has simple structure, convenient operation and low cost.

3. The beam cleaning structure and control method of the present invention adopts an external double-wedge mirror scanning method. While achieving full coverage, no cleaning equipment enters the inside of the container. This avoids the risk of contamination of the equipment and greatly improves the efficiency of the laser cleaning system. security.

4. The beam cleaning structure and control method of the present invention uses an optical window and an adapter barrel to seal the two entrances of the container, which can effectively prevent the leakage of harmful substances that may remain inside the container, which also further guarantees the cleaning process. safety of personnel involved.

Description of the drawings

Figure 1 is a schematic structural diagram of the cleaning component of the beam cleaning structure used in the embodiment of the present invention;

Figure 2 is a schematic structural diagram of the beam cleaning structure used in the embodiment of the present invention;

Figure 3 is a schematic structural diagram of the light spot component of the beam cleaning structure used in the embodiment of the present invention;

Figure 4 is a schematic structural diagram of the wedge mirror assembly of the beam cleaning structure used in the embodiment of the present invention.

Figure 5 is a schematic structural diagram of a dichroic mirror with a beam cleaning structure adopted in an embodiment of the present invention;

Figure 6 is a schematic structural diagram of the cleaning spot of the beam cleaning structure used in the embodiment of the present invention;

Figure 7 is a schematic structural diagram of a container with a beam cleaning structure adopted in an embodiment of the present invention.

Among them, the above-mentioned drawings include the following reference signs:

1. Window piece; 100. Container; 101. Accommodating cavity; 110. Container mouth; 102. First container mouth; 103. Second container mouth; 10. First drive motor; 11. First wedge mirror; 111. No. An incident surface; 112, first exit surface; 2, adapter tube; 12, first motor driver; 20, second drive motor; 21, second wedge mirror; 211, second entrance surface; 212, second exit 200. Cleaning component; 22. Second motor driver; 300. Wedge mirror component; 31. Cleaning dichromatic mirror; 311. Cleaning dichromatic mirror incident surface; 312. Cleaning dichromatic mirror exit surface; 32. First dichromatic mirror; 321 , the first dichromatic mirror incident surface; 322. the first dichromatic mirror exit surface; 33. the second dichromatic mirror; 331. the second dichromatic mirror entrance surface; 332. the second dichromatic mirror exit surface; 400. detection component; 41. A filter; 42. Focusing lens; 43. Imaging component; 500. Spot component; 501. Third wedge mirror; 5011. Third incident surface; 5012. Third exit surface; 502. Fourth wedge mirror; 5021 , the fourth incident surface; 5022, the fourth exit surface; 510, cleaning spot; 51, second filter; 52, rangefinder; 600, reflector; 7, focusing module; 81, output head; 82, Optical fiber cable; 83. Laser light source; 90. Lighting component; 91. Control module.

Detailed ways

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of this application.

According to an embodiment of the present invention, a beam cleaning structure is provided, please refer to Figures 1 to 7, which includes: a container 100. The container 100 has a containing cavity 101 and a container mouth 110 connected with the containing cavity 101; the container mouth 110 includes an oppositely arranged The first container mouth 102 and the second container mouth 103; the cleaning assembly 200, the cleaning assembly 200 is connected with the container 100, the cleaning assembly 200 includes: a laser light source 83, the laser light source 83 is used to emit a beam; a light spot assembly 500, the light spot assembly 500 includes The third wedge mirror 501 and the fourth wedge mirror 502 are spaced apart; the spot assembly 500 is used to receive the beam emitted by the laser light source 83 and form an annular cleaning spot 510 for cleaning the inner wall of the accommodation cavity 101; the focusing module 7. The focusing module 7 is located between the laser light source 83 and the spot assembly 500 to adjust the focal length of the light beam entering the spot assembly 500; the wedge mirror assembly 300 is arranged corresponding to the container mouth 110 so that the cleaning beam passes through the wedge mirror. After the component 300 is refracted, it enters the accommodation cavity 101 and irradiates the inner wall of the accommodation cavity 101; the wedge mirror assembly 300 includes a first wedge mirror 11 and a second wedge mirror 21; a driving motor, the wedge mirror assembly 300 and the driving motor. The output shaft is connected to drive the wedge mirror assembly 300 to rotate, thereby adjusting the irradiation direction of the cleaning beam passing through the wedge mirror assembly 300 .

In the beam cleaning structure of this embodiment, the laser light source 83 emits a beam, and first adjusts the focal length of the beam entering the spot assembly 500 through the focusing module 7 , and then enters the spot assembly 500 to form a cleaning spot for cleaning the inner wall of the accommodation cavity 101 510. After the cleaning light spot 510 is refracted by the wedge mirror assembly 300, it enters the accommodation cavity 101 through the container mouth 110 and irradiates the inner wall of the accommodation cavity 101. The wedge mirror assembly 300 is connected to the output shaft of the driving motor to drive the wedge mirror assembly. 300 rotates to adjust the irradiation direction of the cleaning light spot 510 that passes through the wedge mirror assembly 300, so that the cleaning light spot 510 can achieve laser cleaning of each area through different irradiation directions, and the annular cleaning light spot 510 is used to clean the inner wall of the container. The cleaning light spot 510 can comprehensively scan the inner wall of the container, making the cleaning process without blind spots. The beam cleaning structure of the present invention solves the technical problem in the related art that it is difficult to clean the inner wall of the container.

Specifically, the laser light source 83 is used to output pulsed laser. The cleaning assembly 200 is also provided with an output head 81 for collimating the pulse light. The laser light source 83 is connected to the output head through an optical fiber cable 82 to facilitate the output head 81 to receive the angle of the laser light source 83. More flexible. The laser light source 83 is a pulse fiber laser that outputs pulse laser with a laser wavelength of L1; the output head 81 is a collimation output head that collimates the output pulse laser.

Specifically, the focusing module 7 is a dynamic focusing lens, which is composed of multiple lenses. The front and rear surfaces of the lens are coated with L1 band anti-reflection coating, which can achieve dynamic focusing of the collimated light beam.

Specifically, there is a reflecting mirror 600 between the focusing module 7 and the light spot assembly 500 . The reflecting mirror 600 is used to reflect the light beam emitted from the focusing module 7 onto the light spot assembly 500 .

Referring to Figures 1 and 4, in the beam cleaning structure of this embodiment, the wedge mirror assembly 300 includes: a first wedge mirror 11, the first wedge mirror 11 includes a first incident surface 111 and a first exit surface 112; a second wedge mirror 11; Mirror 21, the second wedge mirror 21 includes a second incident surface 211 and a second exit surface 212; the first exit surface 112 and the second incident surface 211 are arranged parallel to each other; the driving motor includes the first driving motor 10 and the second driving motor 20; The output shaft of the first drive motor 10 is connected to the first wedge mirror 11, and the output shaft of the second drive motor 20 is connected to the second wedge mirror 21. One surface of each wedge mirror of the wedge mirror assembly 300 is a flat surface, and the other surface is an inclined surface with a wedge angle. That is to say, the initial positions of the first wedge mirror 11 and the second wedge mirror 21 are placed symmetrically, so that the outgoing light beam does not deflect. Specifically, the two surfaces of the first wedge mirror 11 and the second wedge mirror 21 are coated with anti-reflection coatings in the visible light band. For vertically incident light beams, they will change an angle for output. If the wedge mirrors are rotated one circle, the outgoing beam will rotate in a circle. . The first wedge mirror 11 and the second wedge mirror 21 are placed in sequence to form a double wedge mirror group. The parallel beam is vertically incident on the lens group, and by controlling the rotation of the two wedge mirrors, any trajectory scanning within a disk area can be achieved. By controlling the phase difference, the outgoing beam can be scanned into a spiral disk. By the first drive motor 10 and the second drive motor 20 repeatedly operating the first wedge mirror 11 and the second wedge mirror 21 to rotate, the inner wall structure of the container 100 is scanned and cleaned in the disk area.

Specifically, the first wedge mirror 11 and the second wedge mirror 21, the first drive motor 10, the second drive motor 20, the first motor driver 12, and the second motor driver 22 constitute an optical scanning module. Among them, two wedge mirrors are respectively installed on the hollow rotating shafts inside the two drive motors. The first motor driver 12 and the second motor driver 22 are connected to the first drive motor 10 and the second drive motor 20 and control them. .

Specifically, the first drive motor 10 and the second drive motor 20 are hollow high-precision ring-shaped motors. The hollow part is used to install the wedge mirror and can drive the wedge mirror to rotate. There is a position sensor on the motor.

The first motor driver 12 and the second motor driver 22 control the motor, realize control of the rotation speed and rotation direction of the motor through electrical control signals, and can also obtain the position of the motor shaft through a position sensor on the motor.

Referring to Figure 1, in the beam cleaning structure of this embodiment, the beam cleaning structure also includes an adapter barrel 2; the adapter barrel 2 is connected to the first container port 102 and the second container port 103; the adapter barrel 2 is provided with a window. The window piece 1 has a cylindrical structure, and the axis of the window piece 1 and the rotation axis of the second wedge mirror 21 coincide with each other. The outside of the adapter barrel 2 is a tapered external thread, which matches the tapered thread of the inlet of the container 100 and is installed to the first container mouth 102 and the second container mouth 103 of the container 100 . The inside of the adapter barrel 2 is a hollow structure, and the middle is used to install the window piece 1. The two surfaces of the window piece 1 are coated with anti-reflection coatings in the visible light band. The axis of the window 1 and the rotation axis of the second wedge mirror 21 coincide with each other, so that the outgoing illumination beam does not deflect.

In some embodiments, when the adapter barrel 2 is installed on the container, the window piece 1 can block the container opening 110 to prevent smoke generated by cleaning from emerging.

In some beam cleaning structures of this embodiment, the wall cleaning structure also includes an adapter barrel 2; the adapter barrel 2 is connected to the first container port 102 or the second container port 103. During operation, first perform laser cleaning from one container mouth, and then go to the corresponding other container mouth for laser cleaning. Once the two cleaning areas are combined, the entire cleaning area of one accommodation chamber 101 can be obtained.

Referring to Figure 2, in the beam cleaning structure of this embodiment, the beam cleaning structure also includes: a range finder 52. The range finder 52 is used to emit a ranging beam into the accommodation cavity 101. After the ranging beam passes through the inner wall, it is emitted from The container mouth 110 is emitted, and the rangefinder 52 obtains distance information based on the ranging beam emitted from the container mouth 110, so that the focusing module 7 adjusts the focal length of the light beam entering the light spot assembly 500 based on the distance information.

Specifically, the rangefinder 52 is a laser ranging module that uses the phase method to perform laser ranging. It emits a beam of monochromatic laser with a laser wavelength of L2. The laser light source irradiates the surface of the object and is reflected back to the laser rangefinder 52 to achieve distance measurement.

Referring to Figure 1, in the beam cleaning structure of this embodiment, the beam cleaning structure also includes: a control module 91. The control module 91 is signal-connected to the rangefinder 52. The control module 91 performs calculations based on distance information to obtain focal length information. And the focal length information is transmitted to the focusing module 7, so that the focusing module 7 adjusts the focal length according to the focal length information. The rangefinder 52 measures the distance, obtains a distance signal, sends it to the control module 91, and then calculates it as a signal of the focusing module 7 to focus the laser. The focused beam is scanned into a line spot at high speed through the spot component 500, and then is incident. To the internal surface of the container 100, through the control of the ranging signal and focus adjustment, the laser focus point is at the irradiation point position on the internal surface of the container 100 to remove uranium hexafluoride residues on the inner wall surface of the container 100.

Referring to Figure 1, in the beam cleaning structure of this embodiment, the beam cleaning structure also includes a detection component 400. The detection component 400 is connected to the container 100. The lighting component 90 is used to emit an illumination beam into the accommodation cavity 101; the imaging component 43 is used to The illumination beam reflected by the inner wall of the accommodation cavity 101 is received, and an image of the inner wall is formed according to the illumination beam; the focus lens 42 is connected with the control module signal to adjust the focal length of the illumination beam.

Specifically, the focusing lens 42 is a liquid lens. By controlling the current and voltage to dynamically adjust the focal length of the lens, very fast dynamic adjustment of the focal length can be achieved. Cooperating with the imaging component 43, rapid imaging at different distances can be achieved. The imaging component 43 is an industrial camera CCD, which can be a black and white camera or a color camera.

Specifically, the lighting component 90 irradiates a white light source or a monochromatic light source and outputs an illumination beam. The illumination beam is a large-aperture beam with a certain divergence angle, providing illumination for the internal area of the container 100 so that the camera can perform imaging observations of the illumination area.

Specifically, the control module 9 centrally controls the laser light source 83, the focus module 7, the light spot component 500, the first motor driver 12, the second motor driver 22, the lighting component 90, the rangefinder 52 and the focus lens 42, and controls them respectively. Connected to it via corresponding cables.

Referring to Figure 5, in the beam cleaning structure of this embodiment, the beam cleaning structure includes a cleaning dichroic mirror 31. The cleaning dichroic mirror 31 includes: a cleaning dichroic mirror incident surface 311, which is used to make the illumination beam and the ranging beam incident through the cleaning dichroic mirror. The surface 311 penetrates the cleaning dichroic mirror 31; the cleaning dichroic mirror exit surface 312 is set opposite to the cleaning dichroic mirror incident surface 311. The cleaning dichroic mirror exit surface 312 causes the cleaning light spot 510 to be refracted through the cleaning dichroic mirror exit surface 312 and then reaches the wedge mirror. Components 300.

The illumination beam and the ranging beam pass through the cleaning dichroic mirror incident surface 311 and penetrate the cleaning dichroic mirror 31 . The cleaning light spot 510 is refracted by the cleaning dichroic mirror exit surface 312 and then reaches the wedge mirror assembly 300 .

Specifically, the cleaning dichroic mirror 31 is placed at an angle of 45°, which is highly reflective to the pulse laser (L1) and highly transmissive to the illumination beam and the rangefinder laser (L2). This is achieved by coating two surfaces with optical media films. The incident surface 311 of the clean dichromatic mirror is coated with an anti-reflection coating in the visible light band, and the exit surface 312 of the clean dichromatic mirror is coated with a high-reflection coating in the L1 band and a high-transmission coating in other visible light bands.

Referring to Figure 5, in the beam cleaning structure of this embodiment, the beam cleaning structure includes a first dichroic mirror 32. The first dichroic mirror 32 is located on the side of the cleaning dichroic mirror 31 away from the wedge mirror assembly 300; the first dichroic mirror 32 includes: The first dichroic mirror incident surface 321; the first dichroic mirror exit surface 322 are used to allow the illumination beam refracted by the inner wall of the container 100 to penetrate the first dichroic mirror 32 through the first dichroic mirror exit surface 322, and the first dichroic mirror exits The surface 322 is used to cause the ranging beam to reach the cleaning dichroic mirror 31 after being reflected by the first dichroic mirror exit surface 322 . The illumination beam penetrates the first dichroic mirror 32 through the first dichroic mirror exit surface 322 , and the ranging light beam reaches the cleaning dichroic mirror 31 after being reflected by the first dichroic mirror exit surface 322 .

Specifically, the first dichromatic mirror 32 is placed at an angle of 45°, which is semi-reflective and semi-transparent to the illumination beam and highly reflective to the rangefinder laser (L1). This is achieved by coating two surfaces with optical media films. The first dichroic mirror exit surface 322 is coated with a semi-reflective and semi-transmissive film in the visible light band and a high reflection in the L2 band. The first dichroic mirror incident surface 321 is coated with a high-transmittance film in the visible light band.

Referring to Figure 5, in the beam cleaning structure of this embodiment, the beam cleaning structure includes a second dichroic mirror 33. The second dichroic mirror 33 includes a second dichroic mirror incident surface 331 for making the illumination beam incident through the second dichroic mirror. The surface 331 penetrates the second dichroic mirror 33; the second dichroic mirror exit surface 332 is used to refract the ranging beam through the second dichroic mirror exit surface 332 and then reach the first dichroic mirror exit surface 322. The illumination beam passes through the second dichroic mirror incident surface 331 and penetrates the second dichroic mirror 33 . The ranging beam is refracted by the second dichroic mirror exit surface 332 and then reaches the first dichroic mirror exit surface 322 .

Specifically, the second dichromatic mirror 33 is placed at an angle of 45°, has high transmission of illumination light and high reflection of the rangefinder laser (L2). This is achieved by coating two surfaces with optical media films. The second dichromatic mirror incident surface 331 is coated with a visible light band anti-reflection coating, and the second dichroic mirror exit surface 332 is coated with a high reflection film in the L2 band and a high transmittance film in other visible light bands.

Referring to Figures 2 and 5, in the beam cleaning structure of this embodiment, the beam cleaning structure includes: a first filter 41. The first filter 41 is located between the first dichroic mirror 32 and the focusing lens 42. The illumination beam is filtered; the second filter 51 is located between the second dichroic mirror 33 and the rangefinder 52 to filter the ranging beam. The first filter 41 is a narrow-band filter with low transmittance in the L2 band and high transmittance in other bands, so that the laser beam L2 of the rangefinder 52 cannot be transmitted, and the beam of the illumination light source can be transmitted with high efficiency, thus preventing The interference of the illumination beam to the imaging component 43 ensures that the imaging component 43 can clearly image the illuminated area. The second filter 51 is a bandpass narrowband filter with high transmittance in the L2 band and low transmittance in other bands, so that the laser beam L2 of the rangefinder 52 can be transmitted with high efficiency, and the beam of the illumination light source cannot pass through, ensuring The ranging precision and accuracy of the rangefinder 52 are improved.

Referring to Figures 3 and 6, in the beam cleaning structure of this embodiment, the third wedge mirror 501 includes a third incident surface 5011 and a third exit surface 5012; the fourth wedge mirror 502 includes a fourth incident surface 5021 and a fourth exit surface. surface 5022; the third exit surface 5012 and the fourth incident surface 5021 are arranged parallel to each other; the driving motor includes a third driving motor and a fourth driving motor; the output shaft of the third driving motor is connected to the third wedge mirror 501, and the fourth driving motor The output shaft of the motor is connected to the fourth wedge mirror 502; the rotation speeds of the third drive motor and the fourth drive motor are the same. The third wedge mirror 501 and the fourth wedge mirror 502 rotate synchronously to scan the incident beam into a circular ring with a fixed diameter, and this circular ring is the cleaning spot 510 .

Referring to Figure 6, the control method in this embodiment includes the above-mentioned beam cleaning structure. The control method includes: driving the third wedge mirror 501 and the fourth wedge mirror 502 of the spot component 500 of the beam cleaning structure at the same rotation speed. Rotate, thereby forming an annular cleaning light spot 510; the first wedge mirror 11 and the second wedge mirror 21 of the wedge mirror assembly 300 of the driving beam cleaning structure rotate at different rotational speeds, so that the cleaning light spot 510 spirals along the inner wall of the container 100 The line moves to clean the inner wall of the container 100 . The third wedge mirror 501 and the fourth wedge mirror 502 of the spot assembly 500 are used in combination with the first wedge mirror 11 and the second wedge mirror 21 of the wedge mirror assembly 300. The two wedge mirrors of the spot assembly 500 scan the incident beam into a fixed The two wedge mirrors of the wedge mirror assembly 300 rotate at different speeds to scan the beam into a spiral trajectory.

Specifically, the focusing module 7 is used to realize dynamic focusing of the light beam, and the rangefinder 52 provides distance information to the focusing module 7 . Specifically, the long-distance dynamic focusing beam achieves full coverage scanning of the inner wall of the container through wedge mirror rotation scanning. All scanning mechanisms (focusing module 7, wedge mirror assembly 300) are placed outside the container, at the first container mouth 102 Install the window piece 1, and the laser beam scans the inner wall from the window piece 1; by controlling the differential rotation of the wedge mirror assembly 300, full coverage scanning of the entire inner wall of the container is achieved, and the focus is controlled by the focusing module 7 to realize the cleaning function of the inner wall of the container. . Under the lighting conditions of the lighting assembly 90, online imaging monitoring of the internal area is achieved through the imaging assembly 43 and the liquid lens.

Specifically, the circular light spot scanned by the light spot component 500 needs to maintain two functions: the ring radius remains unchanged and the light spot superposition rate within the ring remains unchanged during the processing process. The light spot component 500 adopts a coaxial independent rotation method and realizes the above functional requirements by controlling the rotation of the two wedge mirrors.

The ring radius is related to the working distance and deflection angle. The working distance is the distance from the light spot assembly 500 to the laser working point on the inner wall surface of the container 100, and changes as the wedge mirror assembly 300 scans the beam. Therefore, the angle between the two wedge prisms can be controlled to match the working distance, thereby controlling the radius of the ring. The spot superposition rate within the ring is related to the laser beam parameters, ring radius and spot scanning speed. During the processing, the injection laser parameters and ring radius remain unchanged, so only the spot scanning speed needs to be kept constant. By controlling the rotation speed of the two wedge prisms to be the same, the superposition rate of light spots in the ring can be kept unchanged.

Specifically, the first container port 102 is provided as a passage for the cleaning light spot 510 to enter the accommodation cavity 101, and the second container port 103 is used as an exhaust gas exhaust port. The exhaust gas exhaust port is used to discharge the gaseous particles and dust generated by laser cleaning out of the container. 100 outside. Multiple first container openings 102 can be provided according to actual conditions, and multiple cleaning assemblies 200 can be used to clean the inner wall of the container 100 respectively; multiple second container openings 103 can also be provided to separately clean the gaseous particles and dust generated inside. Exhaust.

The control method of this embodiment includes the following processes and steps:

1. Installation of beam cleaning structure and uranium hexafluoride container

Place and fix the uranium hexafluoride container horizontally, remove the right-angle valve and the accessory components of the plug inlet, and install the adapter barrel 2 at the two inlets. There is an installation window 1 in the middle of the adapter barrel 2. Align the wedge mirror assembly 300 of the cleaning structure with one of the inlets as the first container port 102. Adjust and ensure that the wedge mirror assembly 300 is placed on the same optical axis as the window piece 1. The first wedge mirror 11 and the second wedge mirror 11 of the wedge mirror assembly 300 are The wedge mirror 21 is adjusted to the initial position.

2. Laser ranging methods and steps

Send an instruction through the control module 91 to open the rangefinder 52 and emit a ranging laser beam. The laser beam is transmitted through the second filter 51 and then passes through the second dichromatic mirror 33 and the first dichromatic mirror 32 in sequence. It is highly reflective. The laser beam passes through the cleaning dichroic mirror 31, the wedge mirror assembly 300 and the window piece 1, and is incident on a certain point directly in front of the container, and is reflected at that point on the surface of the container. After reflection, the beam passes through the window piece 1, the wedge mirror assembly 300, and the window piece 1 in turn. The dichroic mirror 31 is cleaned, then reflected by the first dichroic mirror 32 and the second dichroic mirror 33 , and returned to the rangefinder 52 . After data processing, the distance information is obtained, and then the distance information is transmitted to the control module 91 .

3. Laser control methods and steps

As shown in FIG. 6 , the third wedge mirror 501 and the fourth wedge mirror 502 of the light spot assembly 500 are used in combination with the first wedge mirror 11 and the second wedge mirror 21 of the wedge mirror assembly 300 . The third wedge mirror 501 and the fourth wedge mirror 502 rotate synchronously to scan the incident beam into an annular spot with a fixed diameter; then the two wedge mirrors of the wedge mirror assembly 300 rotate at different speeds to scan the beam into a spiral trajectory. By controlling the differential rotation of the wedge mirror assembly 300, full coverage scanning of the entire inner wall of the container 100 is achieved, and the cleaning function of the inner wall of the container 100 is realized by controlling the focus in combination with the focusing module 7.

4. Beam lighting methods and steps

Send an instruction through the control module 91 to open the lighting assembly 90 and output the illumination beam. The illumination beam is transmitted through the second dichroic mirror 33 and then partially reflected through the first dichroic mirror 32. The reflected illumination beam passes through the wedge mirror assembly 300 and the window. Piece 1 is incident on the area directly in front of the container to achieve lighting in this area.

5. Optical imaging methods and steps

An instruction is sent through the control module 91 to open the imaging assembly 43 and the focus lens 42 . According to the obtained distance measurement information, it is solved into a focusing length signal and sent to the focusing lens 42 to quickly adjust the focal length of the lens. The reflected light beam of the illuminating area passes through the window piece 1, the wedge mirror assembly 300, the cleaning dichroic mirror 31, the first dichroic mirror 32, and the first filter 41 in sequence, and then passes through the focusing lens 42 to be imaged on the imaging component 43 On the photosensitive surface, imaging of the imaging component 43 is realized. The collected imaging data is transmitted to the control module 91 .

6. Wedge mirror assembly rotation scanning method and steps

Send an instruction through the control module 91 to turn on the first drive motor 10, the second drive motor 20, the first motor driver 12 and the second motor driver 22, drive the motor to rotate, the wedge mirror will follow the rotation, and control the two wedge mirrors to rotate with a certain phase. Differential rotation. The pulsed laser beam, ranging laser beam and illumination beam passed through the wedge mirror are followed for rotational scanning to form a disk area.

7. Full coverage cleaning and scanning method

First, the beam cleaning structure is installed at position A, incident from the A end, and exhaust gas is extracted from the D end to achieve scanning, cleaning, illumination, and imaging of the C-B-D area inside the uranium hexafluoride container; then the beam cleaning structure is installed at B Position, the incident is from the B end, and the exhaust gas is extracted from the A end to realize scanning, cleaning, illumination, and imaging of the C-A-D area inside the uranium hexafluoride container. Finally, full coverage laser cleaning of the entire interior surface of the container is achieved, as shown in Figure 7.

8. Imaging data processing and detection

The pictures taken during the two scanning processes are spliced, and the surface is rendered based on the three-dimensional structural model of the container to obtain three-dimensional graphic data and provide detection conclusions.

It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in the above embodiments, which will not be described again in this embodiment.

The above serial numbers of the embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

In the above-mentioned embodiments of the present application, each embodiment is described with its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

The above are only the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications can also be made. should be regarded as the scope of protection of this application.

Claims (12)

1. A beam cleaning structure, comprising:

a container (100), the container (100) having a receiving cavity (101) and a container mouth (110) in communication with the receiving cavity (101); the container mouth (110) comprises a first container mouth (102) and a second container mouth (103) which are oppositely arranged;

-a cleaning assembly (200), the cleaning assembly (200) being connected to the container (100), the cleaning assembly (200) comprising:

a laser light source (83), the laser light source (83) being adapted to emit a light beam;

a light spot assembly (500), wherein the light spot assembly (500) comprises a third wedge mirror (501) and a fourth wedge mirror (502) which are arranged at intervals; the light spot assembly (500) is used for receiving the light beam emitted by the laser light source (83) and forming an annular cleaning light spot (510) for cleaning the inner wall surface of the accommodating cavity (101);

a focusing module (7), the focusing module (7) being located between the laser light source (83) and the spot assembly (500) to adjust the focal length of the light beam entering the spot assembly (500);

a wedge mirror assembly (300) which is arranged corresponding to the container mouth (110) so that the cleaning light beam enters the accommodating cavity (101) after being refracted by the wedge mirror assembly (300) and irradiates on the inner wall surface of the accommodating cavity (101); the wedge mirror assembly (300) comprises a first wedge mirror (11) and a second wedge mirror (21);

and the wedge lens assembly (300) is connected with an output shaft of the driving motor to drive the wedge lens assembly (300) to rotate, so that the irradiation direction of the cleaning light beam passing through the wedge lens assembly (300) is regulated.

2. The beam cleaning arrangement according to claim 1, characterized in that the first wedge mirror (11) comprises a first entrance face (111) and a first exit face (112); the second wedge mirror (21) comprises a second entrance face (211) and a second exit face (212); the first exit surface (112) and the second entrance surface (211) are arranged parallel to each other;

the drive motor comprises a first drive motor (10) and a second drive motor (20); an output shaft of the first driving motor (10) is connected with the first wedge mirror (11), and an output shaft of the second driving motor (20) is connected with the second wedge mirror (21).

3. The beam cleaning arrangement according to claim 2, characterized in that the beam cleaning arrangement further comprises an adapter cylinder (2); the adapter cylinder (2) is connected with the first container opening (102) and/or the second container opening (103); the adapter tube (2) is provided with a window sheet (1), the window sheet (1) is of a cylindrical structure, and the axis of the window sheet (1) and the rotation axis of the second wedge mirror (21) are mutually overlapped.

4. The beam cleaning structure of claim 1, further comprising:

the range finder (52), range finder (52) are used for to the internal emission range finding light beam of holding chamber (101), range finding light beam is after the internal face, follow container mouth (110) is penetrated, range finder (52) are according to follow range finding light beam that is penetrated in container mouth (110) obtains distance information, so that focusing module (7) are according to distance information adjusts the focal length of getting into the light beam of facula subassembly (500).

5. The beam cleaning structure of claim 4, further comprising:

the control module (91), control module (91) with distancer (52) signal connection, control module (91) is according to distance information calculates to obtain burnt long information, and will burnt long information transmission is given focusing module (7), so that focusing module (7) is according to burnt long information adjustment burnt long.

6. The beam cleaning structure according to claim 5, further comprising a detection assembly (400), the detection assembly (400) being connected to the container (100), the detection assembly (400) comprising:

an illumination assembly (90) for emitting an illumination beam into the receiving cavity (101);

an imaging assembly (43) for receiving the illumination light beam reflected by the inner wall surface of the accommodating chamber (101) and forming an image of the inner wall surface according to the illumination light beam;

and the focusing lens (42) is in signal connection with the control module so as to adjust the focal length of the illumination light beam.

7. The beam cleaning structure according to claim 6, characterized in that the beam cleaning structure comprises a cleaning dichroic mirror (31), the cleaning dichroic mirror (31) comprising:

a cleaning dichroic mirror incidence surface (311) for causing the illumination beam and the ranging beam to penetrate the cleaning dichroic mirror (31) through the cleaning dichroic mirror incidence surface (311);

and a cleaning dichroic mirror exit surface (312) disposed opposite to the cleaning dichroic mirror entrance surface (311), wherein the cleaning dichroic mirror exit surface (312) refracts the cleaning light beam through the cleaning dichroic mirror exit surface (312) and reaches the wedge mirror assembly (300).

8. The beam cleaning structure according to claim 7, characterized in that the beam cleaning structure comprises a first dichroic mirror (32), the first dichroic mirror (32) being located at a side of the cleaning dichroic mirror (31) remote from the wedge mirror assembly (300); the first dichroic mirror (32) includes:

a first dichroic mirror entrance face (321);

a first dichroic mirror exit surface (322) for allowing the illumination beam reflected by the inner wall of the container (100) to penetrate the first dichroic mirror (32) through the first dichroic mirror exit surface (322), the first dichroic mirror exit surface (322) being adapted to allow the ranging beam to reach the cleaning dichroic mirror (31) after being reflected by the first dichroic mirror exit surface (322).

9. The beam cleaning structure according to claim 8, characterized in that the beam cleaning structure comprises a second dichroic mirror (33), the second dichroic mirror (33) comprising:

a second dichroic mirror entrance face (331) for allowing the illumination beam to penetrate the second dichroic mirror (33) through the second dichroic mirror entrance face (331);

and a second dichroic mirror exit surface (332) for refracting the ranging beam through the second dichroic mirror exit surface (332) and reaching the first dichroic mirror exit surface (322).

10. The beam cleaning structure of claim 9, wherein the beam cleaning structure comprises:

a first filter (41), the first filter (41) being located between the first dichroic mirror (32) and the focus lens (42) to filter the illumination beam;

-a second filter (51), the second filter (51) being located between the second dichroic mirror (33) and the rangefinder (52) for filtering the ranging beam.

11. The beam cleaning structure of claim 1, wherein,

the third wedge mirror (501) comprises a third entrance face (5011) and a third exit face (5012);

the fourth wedge mirror (502) comprises a fourth entrance face (5021) and a fourth exit face (5022); the third exit surface (5012) and the fourth entrance surface (5021) are arranged parallel to each other;

the driving motor comprises a third driving motor and a fourth driving motor; an output shaft of the third driving motor is connected with the third wedge mirror (501), and an output shaft of the fourth driving motor is connected with the fourth wedge mirror (502); the rotation speed of the third driving motor is the same as that of the fourth driving motor.

12. A control method suitable for a beam cleaning structure according to any one of claims 1 to 11, characterized in that the control method comprises:

a third wedge mirror (501) and a fourth wedge mirror (502) of the light spot assembly (500) of the light beam cleaning structure are driven to rotate at the same rotation speed, so that an annular cleaning light beam is formed;

the first wedge mirror (11) and the second wedge mirror (21) of the wedge mirror assembly (300) driving the beam cleaning structure are rotated at different rotational speeds, so that the cleaning spot (510) moves along a spiral line on the inner wall of the container (100) to clean the inner wall of the container (100).