Optical beam cleaning structure and control method

Abstract

The application provides a light beam cleaning structure and a control method. The light beam cleaning structure comprises a cleaning assembly, the cleaning assembly comprises a laser light source, the laser light source is used for emitting a light beam, a light spot assembly, the light spot assembly comprises third and fourth wedge mirrors which are arranged at intervals, the light spot assembly is used for receiving the light beam emitted by the laser light source and forming a ring-shaped cleaning light spot used for cleaning an inner wall surface of a containing cavity, a focusing module which is located between the laser light source and the light spot assembly and is used for adjusting the focal length of the light beam entering the light spot assembly, a wedge mirror assembly, so that the cleaning light beam enters the containing cavity after refraction by the wedge mirror assembly and irradiates on the inner wall surface of the containing cavity, the wedge mirror assembly comprises first and second wedge mirrors, and the wedge mirror assembly is connected with an output shaft of a 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 light beam cleaning structure and the control method solve the technical problem that related art is difficult to clean the inner wall of a container.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of container detection, and particularly relates to a light beam cleaning structure and a control method. BACKGROUND

[0002] Uranium hexafluoride is a basic nuclear material, which is widely used in uranium enrichment and turnover. With the rapid development of the nuclear power industry, the production of uranium hexafluoride is increasing year by year, and the use amount and processing task amount of the uranium hexafluoride container are also rapidly increasing. The uranium hexafluoride container is generally a closed hollow container, and there is a "right-angle valve" and a "plug" at both ends of the container as an inlet of the container.

[0003] According to the provisions of the industry standard, when there is any one of the following situations: "periodic inspection and experiment of the container; residual amount of the empty container exceeds the standard; change of the container loading variety (abundance); maintenance of the container; and surface radiation dose rate of the container is too high", the uranium hexafluoride container needs to be cleaned and inspected, and the qualified container is reused, and the unqualified container is scrapped and sent to temporary storage.

[0004] The cleaned uranium hexafluoride container needs to be inspected, and the internal surface (inner wall) of the container needs to be comprehensively inspected. According to the requirements of the industry standard, the inside of the container should be clean and dry, and there should be no any pollutants; the visible surface of the valve channel should not have corrosion marks, green spots, precipitates, moisture, scratches and white alkaline substances.

[0005] The laser cleaning is a physical removal method, which forms gaseous particles and solid waste, and does not produce waste liquid. However, the two inlets (right-angle valve and plug) of the uranium hexafluoride container are Z1" conical threaded interfaces, and the structure is a small diameter through hole. Due to the limitation of the structure size, the existing laser cleaning system is difficult to enter from such a small inlet, and the laser cleaning of the inside of the container cannot be realized. In addition, there is a risk of contamination when entering the inside of the container.

[0006] In summary, with the large increase in the number of uranium hexafluoride containers to be cleaned, the existing cleaning device and method are difficult to meet the demand in terms of economy, environmental protection, cleaning efficiency and safety. SUMMARY

[0007] The present application aims to overcome the above technical deficiencies, and provides a light beam cleaning structure and a control method, so as to solve the technical problem that the inner wall of the container is difficult to clean in the related art.

[0008] To achieve the above technical purposes, the present application adopts the following technical scheme: a light beam cleaning structure, comprising: a container, the container has a containing cavity and a container port communicating with the containing cavity; the container port comprises oppositely arranged first and second container ports; a cleaning assembly is connected with the container, the cleaning assembly comprises: a laser light source for emitting a light beam; a light spot assembly comprising third and fourth wedge mirrors 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 containing cavity; a focusing module is located between the laser light source and the light spot assembly to adjust the focal length of the light beam entering the light spot assembly; a wedge mirror assembly is arranged corresponding to the container port, so that the cleaning light beam enters the containing cavity after refraction through the wedge mirror assembly and irradiates on the inner wall surface of the containing cavity; the wedge mirror assembly comprises first and second wedge mirrors; a drive motor, the wedge mirror assembly is connected with the output shaft of the drive motor to drive the rotation of the wedge mirror assembly, thereby adjusting the irradiation direction of the cleaning light beam passing through the wedge mirror assembly.

[0009] Further, the first wedge mirror comprises a first incident surface and a first exit surface; the second wedge mirror comprises a second incident surface and a second exit surface; the first exit surface and the second incident surface are arranged in parallel with each other; the drive motor comprises first and second drive motors; the output shaft of the first drive motor is connected with the first wedge mirror, and the output shaft of the second drive motor is connected with the second wedge mirror.

[0010] Further, the light beam cleaning structure further comprises an adapter tube; the adapter tube is connected with the first container port and / or the second container port; a window piece is arranged on the adapter tube, the window piece is a cylindrical structure, and the axis of the window piece coincides with the rotation axis of the second wedge mirror.

[0011] Further, the light beam cleaning structure further comprises: a range finder for emitting a ranging light beam into the containing cavity, the ranging light beam is emitted out of the container port after passing through the inner wall surface, and the range finder obtains distance information according to the ranging light beam emitted out of the container port, so that the focusing module adjusts the focal length of the light beam entering the light spot assembly according to the distance information.

[0012] Further, the light beam cleaning structure further comprises: a control module connected with the range finder, the control module calculates the focal length information according to the distance information and transmits the focal length information to the focusing module, so that the focusing module adjusts the focal length according to the focal length information.

[0013] Further, the light beam cleaning structure further comprises a detection assembly connected with the container, the detection assembly comprises: an illumination assembly for emitting an illumination light beam into the containing cavity; an imaging assembly for receiving the illumination light beam reflected by the inner wall surface of the containing cavity and forming an image of the inner wall surface according to the illumination light beam; a focusing lens connected with the control module to adjust the focal length of the illumination light beam.

[0014] Further, the light beam cleaning structure comprises a cleaning dichroic mirror, the cleaning dichroic mirror comprises: a cleaning dichroic mirror incident surface, used for transmitting the illumination light beam and the ranging light beam through the cleaning dichroic mirror incident surface to penetrate the cleaning dichroic mirror; and a cleaning dichroic mirror exit surface, arranged opposite to the cleaning dichroic mirror incident surface, the cleaning dichroic mirror exit surface is used for refracting the cleaning light beam through the cleaning dichroic mirror exit surface to reach the wedge lens assembly.

[0015] Further, the light beam cleaning structure comprises a first dichroic mirror, the first dichroic mirror is located on a side of the cleaning dichroic mirror away from the wedge lens assembly; the first dichroic mirror comprises: a first dichroic mirror incident surface; and a first dichroic mirror exit surface, used for transmitting the illumination light beam refracted through the inner wall of the container through the first dichroic mirror exit surface to penetrate the first dichroic mirror, and used for reflecting the ranging light beam through the first dichroic mirror exit surface to reach the cleaning dichroic mirror.

[0016] Further, the light beam cleaning structure comprises a second dichroic mirror, the second dichroic mirror comprises: a second dichroic mirror incident surface, used for transmitting the illumination light beam through the second dichroic mirror incident surface to penetrate the second dichroic mirror; and a second dichroic mirror exit surface, used for refracting the ranging light beam through the second dichroic mirror exit surface to reach the first dichroic mirror exit surface.

[0017] Further, the light beam cleaning structure comprises: a first filter, the first filter is located between the first dichroic mirror and the focusing lens, and is used for filtering the illumination light beam; and a second filter, the second filter is located between the second dichroic mirror and the range finder, and is used for filtering the ranging light beam.

[0018] Further, the third wedge lens comprises a third incident surface and a third exit surface, the fourth wedge lens comprises a fourth incident surface and a fourth exit surface, the third exit surface and the fourth incident surface are arranged in 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 lens, and an output shaft of the fourth driving motor is connected with the fourth wedge lens, and the third driving motor and the fourth driving motor have the same rotating speed.

[0019] A control method is suitable for the light beam cleaning structure of any one of the above, the control method comprises: driving the third wedge lens and the fourth wedge lens of the light spot group to rotate at the same rotating speed, so as to form a ring-shaped cleaning light beam; and driving the first wedge lens and the second wedge lens of the wedge lens assembly to rotate at different rotating speeds, so as to make the cleaning light spot move along a spiral line on the inner wall of the container to clean the inner wall of the container.

[0020] Beneficial effects:

[0021] 1. The light beam cleaning structure and control method of the application adopts a laser control method, realizes laser cleaning of the uranium hexafluoride container, does not produce liquid waste water, the gaseous and solid waste produced is convenient for recycling and utilization, has simple structure, high cleaning efficiency, low waste disposal cost, and is economic and environmentally friendly.

[0022] 2. The light beam cleaning structure and control method of the application adopts a pulse light source, a light spot assembly, double-wedge mirror scanning, active illumination, laser ranging, dynamic focusing and imaging mode, realizes full coverage scanning laser cleaning of the inner wall of the container, so that the whole system has simple structure, convenient operation and low cost.

[0023] 3. The light beam cleaning structure and control method of the application adopts an external double-wedge mirror scanning mode, realizes full coverage while avoiding the risk of contamination of the equipment by not entering the container, thereby greatly improving the safety of the laser cleaning system.

[0024] 4. The light beam cleaning structure and control method of the application adopts an optical window and an adapter tube to seal the two entrances of the container, which can effectively prevent the leakage of harmful substances that may remain in the container, thereby further ensuring the safety of personnel during the cleaning process. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of the cleaning assembly of the light beam cleaning structure adopted by the embodiment of the application;

[0026] Figure 2 is a structure diagram of the light beam cleaning structure adopted by the embodiment of the application;

[0027] Figure 3 is a structure diagram of the light spot assembly of the light beam cleaning structure adopted by the embodiment of the application;

[0028] Figure 4 is a structure diagram of the wedge mirror assembly of the light beam cleaning structure adopted by the embodiment of the application

[0029] Figure 5 is a structure diagram of the dichroic mirror of the light beam cleaning structure adopted by the embodiment of the application;

[0030] Figure 6 is a structure diagram of the cleaning light spot of the light beam cleaning structure adopted by the embodiment of the application;

[0031] Figure 7 is a structure diagram of the container of the light beam cleaning structure adopted by the embodiment of the application.

[0032] Among them, the above drawings include the following reference signs:

[0033] 1, window sheet; 100, container; 101, containing cavity; 110, container port; 102, first container port; 103, second container port; 10, first driving motor; 11, first wedge mirror; 111, first incident surface; 112, first emergent surface; 2, adapter cylinder; 12, first motor driver; 20, second driving motor; 21, second wedge mirror; 211, second incident surface; 212, second emergent surface; 200, cleaning assembly; 22, second motor driver; 300, wedge mirror assembly; 31, cleaning dichroic mirror; 311, cleaning dichroic mirror incident surface; 312, cleaning dichroic mirror emergent surface; 32, first dichroic mirror; 321, first dichroic mirror incident surface; 322, first dichroic mirror emergent surface; 33, second dichroic mirror; 331, second dichroic mirror incident surface; 332, second dichroic mirror emergent surface; 400, detection assembly; 41, first filter; 42, focusing lens; 43, imaging assembly; 500, light spot assembly; 501, third wedge mirror; 5011, third incident surface; 5012, third emergent surface; 502, fourth wedge mirror; 5021, fourth incident surface; 5022, fourth emergent surface; 510, cleaning light spot; 51, second filter; 52, range finder; 600, reflector; 7, focusing module; 81, output head; 82, optical fiber cable; 83, laser light source; 90, illumination assembly; 91, control module. DETAILED DESCRIPTION

[0034] In order to enable persons skilled in the art to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without making creative efforts should fall within the scope of protection of the present application.

[0035] According to the embodiment of the present application, a light beam cleaning structure is provided, please refer to Figures 1 to 7The container 100 has a containing cavity 101 and a container port 110 communicating with the containing cavity 101; the container port 110 includes oppositely arranged first and second container ports 102 and 103; the cleaning assembly 200 is connected with the container 100 and includes a laser light source 83 for emitting a light beam; a light spot assembly 500 including oppositely arranged third and fourth wedge mirrors 501 and 502; 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 containing cavity 101; a focusing module 7 located between the laser light source 83 and the light spot assembly 500 to adjust the focal length of the light beam entering the light spot assembly 500; a wedge mirror assembly 300 corresponding to the container port 110 to make the cleaning light beam enter the containing cavity 101 after refraction by the wedge mirror assembly 300 and irradiate on the inner wall surface of the containing cavity 101; the wedge mirror assembly 300 includes first and second wedge mirrors 11 and 21; and a driving motor, the wedge mirror assembly 300 is connected with the output shaft of the driving motor to drive the wedge mirror assembly 300 to rotate and thereby adjust the irradiation direction of the cleaning light beam passing through the wedge mirror assembly 300.

[0036] The light beam cleaning structure of the embodiment emits a light beam by the laser light source 83, adjusts the focal length of the light beam entering the light spot assembly 500 by the focusing module 7, and then enters the light spot assembly 500 to form a cleaning light spot 510 for cleaning the inner wall surface of the containing cavity 101; the cleaning light spot 510 enters the containing cavity 101 through the container port 110 after refraction by the wedge mirror assembly 300 and irradiates on the inner wall surface of the containing cavity 101; the wedge mirror assembly 300 is connected with the output shaft of the driving motor to drive the wedge mirror assembly 300 to rotate and thereby adjust the irradiation direction of the resulting cleaning light spot 510 passing through the wedge mirror assembly 300, so that the cleaning light spot 510 realizes laser cleaning work on each region through different irradiation directions; the annular cleaning light spot 510 is used for cleaning the inner wall of the container, and the cleaning light spot 510 can comprehensively scan the inner wall of the container, so that there is no dead angle in the cleaning process. The light beam cleaning structure solves the technical problem that the related art is difficult to clean the inner wall of the container.

[0037] Specifically, the laser light source 83 is used for outputting pulsed laser, and the cleaning assembly 200 is also provided with an output head 81 for collimating pulsed light; the laser light source 83 is connected with the output head through an optical fiber cable 82, so that the angle of the output head 81 receiving the laser light source 83 is more flexible. The laser light source 83 is a pulsed fiber laser, outputs pulsed laser, and the laser wavelength is L1; and the output head 81 is a collimating output head for collimating the output pulsed laser.

[0038] Specifically, the focusing module 7 is a dynamic focusing lens composed of multiple lenses, and the front and back surfaces of the lenses are coated with L1 waveband anti-reflection film, so that the collimated light beam can be dynamically focused.

[0039] Specifically, there is a mirror 600 between the focusing module 7 and the light spot assembly 500, which is used to reflect the light beam emitted from the focusing module 7 to the light spot assembly 500.

[0040] Referring to Figure 1 and Figure 4 In the light beam cleaning structure of the embodiment, the wedge mirror assembly 300 includes: a first wedge mirror 11 including a first incident surface 111 and a first exit surface 112; a second wedge mirror 21 including a second incident surface 211 and a second exit surface 212; the first exit surface 112 is arranged in parallel with the second incident surface 211; the drive motor includes a first drive motor 10 and a second drive motor 20; the output shaft of the first drive motor 10 is connected with the first wedge mirror 11, and the output shaft of the second drive motor 20 is connected with the second wedge mirror 21. One surface of each wedge mirror of the wedge mirror assembly 300 is a plane, and the other surface is an inclined surface with a wedge angle. That is, the initial positions of the first wedge mirror 11 and the second wedge mirror 21 are symmetrically placed, so that the exit light beam is not deflected. Specifically, the two surfaces of the first wedge mirror 11 and the second wedge mirror 21 are coated with visible light waveband anti-reflection film, which changes an angle for output for the normally incident light beam. If the wedge mirror is rotated for one circle, the exit light beam will follow 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 light beam is normally incident to the mirror group, and by controlling the rotation of the two wedge mirrors, any track scanning in a disc area can be realized. By controlling the phase difference, the exit light beam can be scanned into a spiral disc. By repeatedly operating the first wedge mirror 11 and the second wedge mirror 21 to rotate through the first drive motor 10 and the second drive motor 20, the container 100 inner wall structure can realize disc area scanning and cleaning.

[0041] Specifically, the first wedge mirror 11 and the second wedge mirror 21, the first drive motor 10, the second drive motor 20, and the first motor driver 12 and the second motor driver 22 constitute an optical scanning module. The two wedge mirrors are respectively installed on the hollow rotating shafts in the two drive motors, and the first motor driver 12 and the second motor driver 22 are connected with the first drive motor 10 and the second drive motor 20 and control them.

[0042] Specifically, the first drive motor 10 and the second drive motor 20 are hollow high-precision ring motors, and the hollow parts are used to install the wedge mirrors to drive the wedge mirrors to rotate, and the motors have a position sensor.

[0043] The first motor driver 12 and the second motor driver 22 control the motor, realize the control of the rotating speed and the rotating direction of the motor through the electric control signal, and can obtain the position of the rotating shaft of the motor through the position sensor on the motor.

[0044] Referring to Figure 1 In the light beam cleaning structure, the light beam cleaning structure further comprises an adapter tube 2, the adapter tube 2 is connected with the first container port 102 and the second container port 103, and the adapter tube 2 is provided with a window sheet 1, the window sheet 1 is a cylindrical structure, and the axis of the window sheet 1 coincides with the rotating axis of the second wedge mirror 21. The outer part of the adapter tube 2 is a conical external thread, which is matched with the conical thread of the inlet of the container 100, and is installed into the first container port 102 and the second container port 103 of the container 100. The inner part of the adapter tube 2 is a hollow structure, which is used for installing the window sheet 1, and the two surfaces of the window sheet 1 are coated with a visible light band anti-reflection film. The axis of the window sheet 1 coincides with the rotating axis of the second wedge mirror 21, so that the emitted illumination light beam is not deflected.

[0045] In some embodiments, when the adapter tube 2 is installed on the container, the window sheet 1 can block the container port 110 to prevent smoke generated by cleaning from being emitted.

[0046] In some light beam cleaning structures, the wall cleaning structure further comprises an adapter tube 2, the adapter tube 2 is connected with the first container port 102 or the second container port 103. In operation, laser cleaning is first performed from one container port, and then laser cleaning is performed from the other corresponding container port. The combined cleaning areas of the two times of cleaning can obtain the entire cleaning area of the containing cavity 101.

[0047] Referring to Figure 2 In the light beam cleaning structure, the light beam cleaning structure further comprises a range finder 52, the range finder 52 is used for emitting a ranging light beam into the containing cavity 101, the ranging light beam is emitted from the container port 110 after passing through the inner wall surface, and the range finder 52 obtains distance information according to the ranging light beam emitted from the container port 110, so that the focusing module 7 adjusts the focal length of the light beam entering the light spot assembly 500 according to the distance information.

[0048] Specifically, the range finder 52 is a laser ranging module, which adopts a phase method to perform laser ranging. The range finder 52 emits a monochromatic laser beam, the wavelength of the laser beam is L2, the laser light source is irradiated to the surface of an object, and the reflected laser light is reflected back to the range finder 52, so that the distance is measured.

[0049] Referring to Figure 1In the light beam cleaning structure of the embodiment, the light beam cleaning structure further comprises a control module 91, which is in signal connection with the distance meter 52. The control module 91 calculates according to the distance information to obtain the focal length information, and transmits the focal length information to the focusing module 7, so that the focusing module 7 adjusts the focal length according to the focal length information. The distance meter 52 measures the distance to obtain the distance signal, which is sent to the control module 91, and then calculated as a signal of the focusing module 7. The laser is focused, and the focused light beam is scanned by the light spot assembly 500 at a high speed into a linear light spot, and then is incident on the inner surface of the container 100. Through the control of the distance signal and the focusing, the laser focus point is located at the irradiation point position of the inner surface of the container 100, so that the uranium hexafluoride residue on the inner wall surface of the container 100 is removed.

[0050] Referring to Figure 1 In the light beam cleaning structure of the embodiment, the light beam cleaning structure further comprises a detection assembly 400 connected with the container 100. The illumination assembly 90 is used for emitting an illumination light beam into the containing cavity 101. The imaging assembly 43 is used for receiving the illumination light beam reflected by the inner wall surface of the containing cavity 101, and forming an image of the inner wall surface according to the illumination light beam. The focusing lens 42 is in signal connection with the control module, so as to adjust the focal length of the illumination light beam.

[0051] Specifically, the focusing lens 42 is a liquid lens, which dynamically adjusts the focal length of the lens by controlling the current voltage, so as to realize very fast dynamic adjustment of the focal length. In cooperation with the imaging assembly 43, fast imaging of different distances can be realized. The imaging assembly 43 is an industrial camera CCD, which can be a black and white camera or a color camera.

[0052] Specifically, the illumination assembly 90 irradiates a white light source or a monochromatic light source to output an illumination light beam. The illumination light beam is a large-aperture light beam with a certain divergence angle, which provides illumination for the internal region of the container 100, so that the camera can image and observe the illumination region.

[0053] Specifically, the control module 9 centrally controls the laser light source 83, the focusing module 7, the light spot assembly 500, the first motor driver 12, the second motor driver 22, the illumination assembly 90, the distance meter 52 and the focusing lens 42, and is connected with them through corresponding cables.

[0054] Referring to Figure 5 In the light beam cleaning structure of the embodiment, the light beam cleaning structure comprises a cleaning dichroic mirror 31, which comprises a cleaning dichroic mirror incident surface 311, which is used for making the illumination light beam and the distance measuring light beam penetrate the cleaning dichroic mirror 31 through the cleaning dichroic mirror incident surface 311; and a cleaning dichroic mirror exit surface 312, which is arranged opposite to the cleaning dichroic mirror incident surface 311. The cleaning dichroic mirror exit surface 312 makes the cleaning light spot 510 refract through the cleaning dichroic mirror exit surface 312 to reach the wedge lens assembly 300.

[0055] The illumination light beam and the ranging light beam penetrate the cleaning dichroic mirror 31 through the cleaning dichroic mirror entrance surface 311, and the cleaning light spot 510 reaches the wedge mirror assembly 300 after being refracted by the cleaning dichroic mirror exit surface 312.

[0056] Specifically, the cleaning dichroic mirror 31 is placed at an angle of 45°, which is highly reflective to the pulsed laser (L1) and highly transmissive to the illumination light beam and the ranging laser (L2). The cleaning dichroic mirror entrance surface 311 is coated with an antireflection film in the visible light band, and the cleaning dichroic mirror exit surface 312 is coated with a high-reflection film in the L1 band and a high-transmission film in other visible light bands.

[0057] Referring to Figure 5 In the light beam cleaning structure of the embodiment, the light beam cleaning structure includes a first dichroic mirror 32 located on the side of the cleaning dichroic mirror 31 away from the wedge mirror assembly 300. The first dichroic mirror 32 includes a first dichroic mirror entrance surface 321 and a first dichroic mirror exit surface 322. The illumination light beam penetrates the first dichroic mirror 32 through the first dichroic mirror exit surface 322 after being refracted by the inner wall of the container 100, and the ranging light beam reaches the cleaning dichroic mirror 31 after being reflected by the first dichroic mirror exit surface 322. The illumination light 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.

[0058] Specifically, the first dichroic mirror 32 is placed at an angle of 45°, which is semi-reflective and semi-transmissive to the illumination light beam and highly reflective to the ranging laser (L1). 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 film in the L2 band, and the first dichroic mirror entrance surface 321 is coated with a high-transmission film in the visible light band.

[0059] Referring to Figure 5 In the light beam cleaning structure of the embodiment, the light beam cleaning structure includes a second dichroic mirror 33. The second dichroic mirror 33 includes a second dichroic mirror entrance surface 331 and a second dichroic mirror exit surface 332. The illumination light beam penetrates the second dichroic mirror 33 through the second dichroic mirror entrance surface 331, and the ranging light beam reaches the first dichroic mirror exit surface 322 after being refracted by the second dichroic mirror exit surface 332. The illumination light beam penetrates the second dichroic mirror 33 through the second dichroic mirror entrance surface 331, and the ranging light beam reaches the first dichroic mirror exit surface 322 after being refracted by the second dichroic mirror exit surface 332.

[0060] Specifically, the second dichroic mirror 33 is placed at an angle of 45°, which is high-transmissive to the illumination light and high-reflective to the rangefinder laser (L2). The second dichroic mirror is coated with an optical medium film on two surfaces, the second dichroic mirror entrance surface 331 is coated with a visible light band anti-reflection film, and the second dichroic mirror exit surface 332 is coated with an L2 band high-reflection, visible light other band high-transmission film.

[0061] Referring to Figure 2 and Figure 5 In the light beam cleaning structure of the embodiment, the light beam cleaning structure comprises: a first filter 41, the first filter 41 is located between the first dichroic mirror 32 and the focusing lens 42 to filter the illumination light beam; and a second filter 51, the second filter 51 is located between the second dichroic mirror 33 and the rangefinder 52 to filter the ranging light beam. The first filter 41 is a narrow-band filter, which has 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 light beam of the illumination light source can be transmitted with high efficiency, thereby preventing the illumination light beam from interfering with the imaging of the imaging assembly 43 and ensuring the clear imaging of the imaging assembly 43 on the illumination area. The second filter 51 is a band-pass narrow-band filter, which has 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 light beam of the illumination light source cannot pass through, thereby ensuring the ranging accuracy and accuracy of the rangefinder 52.

[0062] Referring to Figure 3 and Figure 6 In the light beam cleaning structure of the embodiment, the third wedge mirror 501 comprises a third entrance surface 5011 and a third exit surface 5012, and the fourth wedge mirror 502 comprises a fourth entrance surface 5021 and a fourth exit surface 5022. The third exit surface 5012 and the fourth entrance surface 5021 are arranged in parallel with each other. The drive motor comprises a third drive motor and a fourth drive motor. The output shaft of the third drive motor is connected with the third wedge mirror 501, and the output shaft of the fourth drive motor is connected with the fourth wedge mirror 502. The rotation speeds of the third drive motor and the fourth drive motor are the same. The synchronous rotation of the third wedge mirror 501 and the fourth wedge mirror 502 scans the incident light beam into a fixed-diameter circular ring, which is the cleaning light spot 510.

[0063] Referring to Figure 6In the control method of the embodiment, the light beam cleaning structure is included, and the control method comprises: driving the third wedge mirror 501 and the fourth wedge mirror 502 of the light spot assembly 500 of the light beam cleaning structure to rotate at the same rotating speed, so as to form a ring-shaped cleaning light spot 510; and driving the first wedge mirror 11 and the second wedge mirror 21 of the wedge mirror assembly 300 of the light beam cleaning structure to rotate at different rotating speeds, so that the cleaning light spot 510 moves along a spiral line on the inner wall of the container 100 to clean the inner wall of the container 100. 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 two wedge mirrors of the light spot assembly 500 scan the incident light beam into a circular ring with a fixed diameter, and the two wedge mirrors of the wedge mirror assembly 300 rotate at different speeds to scan the light beam into a spiral track. Figure 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 two wedge mirrors of the light spot assembly 500 scan the incident light beam into a circular ring with a fixed diameter, and the two wedge mirrors of the wedge mirror assembly 300 rotate at different speeds to scan the light beam into a spiral track.

[0064] Specifically, the dynamic focusing of the light beam is realized by using the focusing module 7, and the rangefinder 52 provides distance information for the focusing module 7. Specifically, the long-distance dynamic focusing light beam realizes full-coverage scanning of the inner wall of the container by means of the wedge mirror rotating scanning mode, and all scanning mechanisms (the focusing module 7 and the wedge mirror assembly 300) are arranged outside the container. The window sheet 1 is installed at the first container port 102, and the laser beam scans the inner wall from the window sheet 1; the full-coverage scanning of the full inner wall of the container is realized by controlling the differential rotation of the wedge mirror assembly 300, and the focusing module 7 is combined to control the focal point to realize the cleaning function of the inner wall of the container. Under the illumination condition of the illumination assembly 90, the online imaging monitoring of the internal area is realized by the imaging assembly 43 and the liquid lens.

[0065] Specifically, the circular ring light spot scanned by the light spot assembly 500 needs to maintain two functions of keeping the circular ring radius unchanged and keeping the light spot overlapping rate in the ring unchanged during the machining process. The light spot assembly 500 adopts a coaxial independent rotating mode, and the above-mentioned functional requirements are realized by controlling the rotation of the two wedge mirrors.

[0066] The circular ring radius is related to the working distance and the 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, which changes with the scanning of the wedge mirror assembly 300. Therefore, the working distance can be matched by controlling the included angle of the two wedge prisms, so as to realize the control of the circular ring radius. The light spot overlapping rate in the circular ring is related to the laser beam parameters, the circular ring radius and the light spot scanning speed. The laser parameters and the circular ring radius remain unchanged during the machining process, so it is only necessary to keep the light spot scanning speed unchanged. The same rotating speed of the two wedge prisms can realize the constant light spot overlapping rate in the circular ring.

[0067] Specifically, a first container port 102 is provided as a passage for the cleaning spot 510 to enter the accommodating chamber 101, and a second container port 103 is provided as an exhaust port for discharging gaseous particles and dust generated by laser cleaning from the container 100. Multiple first container ports 102 can be provided, depending on practical circumstances, with multiple cleaning assemblies 200 used to clean the inner wall of the container 100. Multiple second container ports 103 can also be provided, each for exhausting gaseous particles and dust generated within the container.

[0068] The control method of this embodiment includes the following processes and steps:

[0069] 1. Installation of beam cleaning structure and uranium hexafluoride container

[0070] Place the uranium hexafluoride container horizontally and securely. Remove the right-angle valve and plug inlet components. Install adapter tubes 2 at each inlet, each with a window 1 mounted in the center. Align the cleaning structure's wedge mirror assembly 300 with one of the inlets, serving as the first container port 102. Adjust the wedge mirror assembly 300 to ensure it is coaxial with the window 1. Return the first and second wedge mirrors 11 and 21 of the wedge mirror assembly 300 to their initial positions.

[0071] 2. Laser ranging method and steps

[0072] An instruction is sent through the control module 91 to turn on 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 dichroic mirror 33 and the first dichroic mirror 32 in sequence, and is highly reflected. After reflection, the laser beam passes through the cleaning dichroic mirror 31, the wedge mirror assembly 300, and the window 1, and is incident on a point directly in front of the container. It is reflected at this point on the container surface. After reflection, the light beam passes through the window 1, the wedge mirror assembly 300, and the cleaning dichroic mirror 31 in sequence, and then is reflected by the first dichroic mirror 32 and the second dichroic mirror 33, and returns to the rangefinder 52. After data processing, distance information is obtained, and the distance information is then transmitted to the control module 91.

[0073] 3. Laser control methods and steps

[0074] like Figure 6 As shown, the third and fourth wedge mirrors 501 and 502 of the spot assembly 500 are used in conjunction with the first and second wedge mirrors 11 and 21 of the wedge mirror assembly 300. The third and fourth wedge mirrors 501 and 502 rotate synchronously, scanning the incident light beam into an annular spot with a fixed diameter. The two wedge mirrors of the wedge mirror assembly 300 then rotate at different speeds, scanning the light beam into a spiral trajectory. By controlling the differential rotation of the wedge mirror assembly 300, full coverage scanning of the entire interior surface of the container 100 is achieved. In combination with the focus control module 7, the focus is controlled to achieve cleaning of the interior surface of the container 100.

[0075] 4. Beam illumination method and steps

[0076] The control module 91 sends a command to turn on the illumination assembly 90 to output an illumination beam, which is transmitted by the second dichroic mirror 33 and then partially reflected by the first dichroic mirror 32. The reflected illumination beam passes through the wedge mirror assembly 300 and the window sheet 1 and is incident on the area directly in front of the container, thereby illuminating the area.

[0077] 5. Optical imaging method and steps

[0078] The control module 91 sends a command to turn on the imaging assembly 43 and the focusing lens 42. According to the obtained ranging information, the focusing length signal is calculated and sent to the focusing lens 42, so that the focusing length of the lens is quickly adjusted. The reflected beam of the illumination beam of the illumination area passes through the window sheet 1, the wedge mirror assembly 300, the cleaning dichroic mirror 31, the first dichroic mirror 32, the first filter 41, and then the focusing lens 42, and is imaged on the photosensitive surface of the imaging assembly 43, thereby realizing the imaging of the imaging assembly 43. The collected imaging data is transmitted to the control module 91.

[0079] 6. Wedge mirror assembly rotation scanning method and steps

[0080] The control module 91 sends a command to turn on the first drive motor 10, the second drive motor 20, the first motor driver 12, and the second motor driver 22, and drives the motors to rotate, so that the wedge mirrors follow the rotation and control the two wedge mirrors to rotate with a certain phase difference. The pulsed laser beam, the ranging laser beam, and the illumination beam follow the rotation scanning through the wedge mirrors, thereby forming a disc area.

[0081] 7. Full-coverage cleaning scanning mode

[0082] First, the beam cleaning structure is installed at position A, and the light is incident from the A end and the exhaust gas is extracted from the D end, thereby realizing scanning, cleaning, illumination, and imaging of the C-B-D area inside the uranium hexafluoride container. Then, the beam cleaning structure is installed at position B, and the light is incident from the B end and the exhaust gas is extracted from the A end, thereby realizing scanning, cleaning, illumination, and imaging of the C-A-D area inside the uranium hexafluoride container. Finally, full-surface laser cleaning of the container is realized, as shown in Figure 7

[0083] 8. Imaging data processing and detection

[0084] The pictures taken in the two scanning processes are spliced, the surface is rendered based on the three-dimensional structure model of the container, three-dimensional graphic data is obtained, and a detection conclusion is provided.

[0085] ​It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms is arbitrary apart from their definition in the specification or by understanding that the use of these terms in the present description is solely for the purpose of nomenclature and does not in any way limit the scope of the application. Furthermore, the terms "comprise", "comprising", "include", "including", and the like are to be construed in their non-limiting sense as meaning that "comprising" other elements not specifically recited are also included. The terms "first", "second" and the like, "antecedent" and "subsequent", as used in the description and the claims, do not connote any prioritization, ordering, or importance, but are used only to distinguish between the elements being described.

[0086] Optionally, the specific examples in the embodiments can refer to the examples described in the above embodiments, and the embodiments will not be described here again.

[0087] The sequence numbers of the above-described embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0088] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0089] The above only describes the preferred embodiments of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A light beam cleaning structure, characterized in that, The application relates to a light beam cleaning structure. The light beam cleaning structure comprises: a container (100) having a containing cavity (101) and a container port (110) communicating with the containing cavity (101); the container port (110) comprises oppositely arranged first and second container ports (102 and 103); a cleaning assembly (200) connected with the container (100), the cleaning assembly (200) comprising: a laser light source (83) for emitting a light beam; a light spot assembly (500) comprising third and fourth wedge mirrors (501 and 502) arranged at intervals; the light spot assembly (500) is used for receiving the light beam emitted by the laser light source (83) and forming a ring-shaped cleaning light spot (510) for cleaning the inner wall surface of the containing cavity (101); a focusing module (7) located between the laser light source (83) and the light spot assembly (500) to adjust the focal length of the light beam entering the light spot assembly (500); a wedge mirror assembly (300) arranged corresponding to the container port (110) to make the light beam enter the containing cavity (101) after being refracted by the wedge mirror assembly (300) and irradiate on the inner wall surface of the containing cavity (101); the wedge mirror assembly (300) comprises first and second wedge mirrors (11 and 21); a driving motor, the wedge mirror assembly (300) is connected with the output shaft of the driving motor to drive the wedge mirror assembly (300) to rotate, so that the irradiation direction of the cleaning light beam passing through the wedge mirror assembly (300) is adjusted; 2. The beam cleaning structure of claim 1, wherein, wherein the third and fourth wedge mirrors (501 and 502) of the light spot assembly (500) rotate synchronously to form the ring-shaped cleaning light spot (510), and the first and second wedge mirrors (11 and 21) of the wedge mirror assembly (300) rotate at different speeds to make the cleaning light spot (510) move along a spiral line on the inner wall of the container. The first wedge mirror (11) comprises a first incident surface (111) and a first exit surface (112); the second wedge mirror (21) comprises a second incident surface (211) and a second exit surface (212); the first exit surface (112) and the second incident surface (211) are arranged in parallel to each other; 3. The light beam cleaning structure of claim 2, wherein, the driving motor comprises first and second driving motors (10 and 20); the output shaft of the first driving motor (10) is connected with the first wedge mirror (11), and the output shaft of the second driving motor (20) is connected with the second wedge mirror (21).

4. The beam cleaning structure of claim 1, wherein, The light beam cleaning structure further comprises an adapter cylinder (2); the adapter cylinder (2) is connected with the first and / or second container ports (102 and 103); a window sheet (1) is arranged on the adapter cylinder (2); the window sheet (1) is a cylindrical structure, and the axis of the window sheet (1) coincides with the rotation axis of the second wedge mirror (21). The light beam cleaning structure further comprises: A range finder (52) is arranged to emit a range finding light beam into the accommodating cavity (101), the range finding light beam is transmitted through the inner wall surface and then emitted from the container port (110), the range finder (52) obtains distance information according to the range finding light beam emitted from the container port (110), so that the focusing module (7) adjusts the focal length of the light beam entering the light spot assembly (500) according to the distance information.

5. The light beam cleaning structure of claim 4, wherein, The light beam cleaning structure further comprises: A control module (91) is in signal connection with the range finder (52), the control module (91) calculates according to the distance information to obtain focal length information, and transmits the focal length information to the focusing module (7), so that the focusing module (7) adjusts the focal length according to the focal length information.

6. The beam cleaning structure of claim 5, wherein, The light beam cleaning structure further comprises a detection assembly (400) connected with the container (100), the detection assembly (400) comprises: An illumination assembly (90) is arranged to emit an illumination light beam into the accommodating cavity (101); An imaging assembly (43) is arranged to receive the illumination light beam reflected by the inner wall surface of the accommodating cavity (101) and form an image of the inner wall surface according to the illumination light beam; A focusing lens (42) is in signal connection with the control module to adjust the focal length of the illumination light beam.

7. The beam cleaning structure of claim 6, wherein, The light beam cleaning structure comprises a cleaning dichroic mirror (31), the cleaning dichroic mirror (31) comprises: A cleaning dichroic mirror incident surface (311) is arranged to make the illumination light beam and the range finding light beam penetrate the cleaning dichroic mirror (31) through the cleaning dichroic mirror incident surface (311); A cleaning dichroic mirror exit surface (312) is arranged opposite to the cleaning dichroic mirror incident surface (311), the cleaning dichroic mirror exit surface (312) makes the cleaning light beam refract through the cleaning dichroic mirror exit surface (312) and then reach the wedge lens assembly (300).

8. The beam cleaning structure of claim 7, wherein, The light beam cleaning structure comprises 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 lens assembly (300); the first dichroic mirror (32) comprises: A first dichroic mirror incident surface (321); A first dichroic mirror exit surface (322) is arranged to make the illumination light beam reflected by the inner wall of the container (100) penetrate the first dichroic mirror (32) through the first dichroic mirror exit surface (322), and the first dichroic mirror exit surface (322) is arranged to make the range finding light beam reflect through the first dichroic mirror exit surface (322) and then reach the cleaning dichroic mirror (31).

9. The beam cleaning structure of claim 8, wherein, The light beam cleaning structure comprises a second dichroic mirror (33), the second dichroic mirror (33) comprises: A second dichroic mirror incident surface (331) is arranged to make the illumination light beam penetrate the second dichroic mirror (33) through the second dichroic mirror incident surface (331); A second dichroic mirror exit surface (332) is configured to allow the ranging light beam to pass through the second dichroic mirror exit surface (332) and then to the first dichroic mirror exit surface (322).

10. The light beam cleaning structure of claim 9, wherein, The light beam cleaning structure comprises: A first filter (41) is arranged between the first dichroic mirror (32) and the focusing lens (42) to filter the illumination light beam; A second filter (51) is arranged between the second dichroic mirror (33) and the rangefinder (52) to filter the ranging light beam.

11. The light beam cleaning structure according to claim 1, wherein The third wedge mirror (501) comprises a third incident surface (5011) and a third exit surface (5012); The fourth wedge mirror (502) comprises a fourth incident surface (5021) and a fourth exit surface (5022); the third exit surface (5012) and the fourth incident surface (5021) are arranged in parallel to each other; The driving motor comprises 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 output shaft of the fourth driving motor is connected to the fourth wedge mirror (502); the third driving motor and the fourth driving motor have the same rotating speed.

12. A control method suitable for use with a light beam cleaning structure as claimed in any one of claims 1 to 11, characterized in that, The control method comprises: Driving the third wedge mirror (501) and the fourth wedge mirror (502) of the light spot assembly (500) of the light beam cleaning structure to rotate at the same rotating speed, so as to form a ring-shaped cleaning light beam; Driving the first wedge mirror (11) and the second wedge mirror (21) of the wedge mirror assembly (300) of the light beam cleaning structure to rotate at different rotating speeds, so that the cleaning light spot (510) moves along a spiral line on the inner wall of the container (100) to clean the inner wall of the container (100).

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