Laser transmission device and laser transmission method

Abstract

The present invention relates to a laser transmission device and a laser transmission method, comprising a laser, a receiving module, a conducting module and an output module. The laser is used to generate a laser beam and output it to the receiving module through an armored cable. After receiving the laser beam output by the armored cable, the receiving module transmits the laser beam to the conducting module. The conducting module comprises a transmission section located inside a wall. The transmission section is used to transmit the laser beam received by the conducting module through at least a part of the wall. The output module is used to receive the laser beam transmitted by the conducting module and output the laser beam, thereby solving the problem of frequent replacement of the cutting head in the prior art. In addition, the laser transmission device arranges a laser that cannot withstand radiation outside the wall, thereby facilitating the protection and maintenance of the laser. The transmission section is used to transmit the laser from outside the hot room to inside the hot room. The optical path design is ingenious, which not only ingeniously solves the problem of spent fuel rod disintegration in the hot room, but also improves the efficiency of spent fuel rod disintegration.

Description

Technical Field

[0001] The present invention relates to the field of laser transmission, and specifically, to a laser transmission device and a laser transmission method. Background Art

[0002] At present, the disassembly of spent fuel rods in a hot cell mainly uses a rotating cutter head for cutting. The cutter head is prone to losses such as chipping during the cutting process and needs to be frequently replaced. Since the inside of the hot cell has strong radiation and maintenance personnel cannot enter, the replacement of the cutter head is very difficult. Laser cutting uses a laser with a high energy density as a "tool", which is a non-contact cutting method and there is no problem of "tool" loss, making it very suitable for solving cutting problems in a strong radiation environment. Since the laser cannot withstand radiation, it needs to be placed outside the hot cell. Therefore, efficiently transmitting the laser from outside the hot cell to inside the hot cell has become a key issue. Summary of the Invention

[0003] Based on this, in view of the above problems, the present invention provides a laser transmission device and a laser transmission method, which solve the problem of frequent replacement of the cutting head in the prior art, can realize the efficient transmission of the laser from outside the hot cell to inside the hot cell, and improve the efficiency and safety performance of the disassembly of spent fuel rods in the hot cell.

[0004] To achieve the above object, the present invention provides a laser transmission device, including a laser, a receiving module, a conduction module, and an output module. The laser is used to generate a laser beam and output it to the receiving module through an armored cable. After receiving the laser beam output by the armored cable, the receiving module transmits the laser beam to the conduction module. The conduction module includes a transmission section located inside the wall, and the transmission section is used to make the laser beam received by the conduction module pass through at least a part of the wall for transmission. The output module is used to receive the laser beam transmitted by the conduction module and output the laser beam.

[0005] In one embodiment, the laser and the receiving module are arranged outside the wall and are located on the outer side of the wall.

[0006] In one embodiment, the receiving module can adjust the angle of the laser beam transmitted to the conduction module.

[0007] In one embodiment, the receiving module includes an optical fiber end cap, a collimating lens, and a first reflector. The divergent laser beam emitted by the optical fiber end cap becomes a collimated laser beam after passing through the collimating lens. The collimated laser beam is transmitted to the conduction module after being reflected by the first reflector. The collimating lens is displaced in the x, y, and z directions, and the first reflector can rotate.

[0008] In one embodiment, the collimating lens is connected with a translation adjustment mechanism. The translation adjustment mechanism includes a first manual micrometer head, a first spring, a second micrometer head, a second spring, a handwheel, a lens barrel and a lens holder. The collimating lens is disposed between the first manual micrometer head and the first spring. Rotating the first micrometer head clockwise can push the collimating lens to move in the +y direction, and rotating the first micrometer head counterclockwise can push the collimating lens to move in the -y direction. The collimating lens is also disposed between the second manual micrometer head and the second spring. Rotating the second micrometer head clockwise can push the collimating lens to move in the +x direction, and rotating the second micrometer head counterclockwise can push the collimating lens to move in the -x direction. The collimating lens is installed in the lens holder. One end of the lens barrel is connected to the lens holder, and the other end is threadedly connected to the handwheel. Rotating the handwheel can move the lens barrel in the ±z direction, thereby driving the collimating lens to move in the ±z direction.

[0009] In one embodiment, the first reflector is connected with an angle adjustment mechanism. The angle adjustment mechanism includes a lens holder, a fixed mount, a first displacement pushing device and a second displacement pushing device. The first reflector is installed in the lens holder, and the lens holder is installed on the fixed mount. The angle adjustment mechanism is the first displacement pushing device and the second displacement pushing device disposed at the diagonal positions of the lens holder and the fixed mount. The first displacement pushing device and the second displacement pushing device pass through the fixed mount and are connected to the lens holder. By changing the distance that the first displacement pushing device and the second displacement pushing device pass through the fixed mount, the yaw of the lens holder relative to the mirror mount can be pushed, thereby realizing the adjustment of the deflection angle of the first reflector. The angle adjustment mechanism can also be a rotating motor.

[0010] In one embodiment, the transmission optical path of the transmission section is non-linear.

[0011] In one embodiment, a second reflector and a third reflector are disposed in the transmission section. The optical paths of the second reflector and the third reflector are in communication, and a "Z" - shaped optical path is formed after the laser beam is reflected twice.

[0012] In one embodiment, N reflectors are disposed in the transmission section. The N reflectors jointly form a communicating optical path, making the transmission optical path of the transmission section non-linear, where N is an integer greater than 2.

[0013] In one embodiment, the outer side of the optical path of the transmission section is wrapped with radiation - proof material.

[0014] In one embodiment, the output module includes a focusing lens, a transmission optical fiber, and a stray light detector. The transmission optical fiber includes a core and a cladding wrapped around the outside of the core. The laser beam output by the conduction module is focused by the focusing lens and then transmitted into the core of the transmission optical fiber for further forward transmission. The light that is not coupled into the core is transmitted forward in the cladding. The transmission optical fiber includes a light leakage section, and the cladding of the light leakage section is provided with a light leakage groove. The laser is transmitted from the light leakage groove to the outside of the optical fiber. The stray light detector is used to detect the power of the laser leaking from the light leakage groove.

[0015] In one embodiment, the output module can be disposed outside the wall and on the inner side of the wall; the output module can also be disposed inside the wall.

[0016] In one embodiment, a processor is further included. The processor is communicatively connected to the stray light detector, the translation adjustment mechanism, and the angle adjustment mechanism. The laser power detected by the stray light detector is transmitted to the processor, and the processor controls the displacement of the translation adjustment mechanism and / or the rotation angle of the angle adjustment mechanism according to the power value.

[0017] In one embodiment, a laser transmission method is further provided, including the following steps:

[0018] The laser generator generates a laser beam and transmits it to the receiving module through an armored cable;

[0019] After the receiving module receives the laser beam output by the armored cable, it transmits the laser beam to the conduction module;

[0020] The conduction module includes a transmission section located inside the wall. The transmission section transmits the laser beam received by the conduction module through at least a part of the wall and transmits it to the output module;

[0021] The output module is used to receive the laser beam transmitted by the conduction module and output the laser beam.

[0022] In one embodiment, the path of the transmission section for transmitting the laser beam is non-linear.

[0023] In one embodiment, after the conduction module receives the laser beam, it is reflected by a second mirror and a third mirror in sequence in the transmission section to form a Z-shaped optical path, and then the laser beam is transmitted to the output module.

[0024] In one embodiment, after the conduction module receives the laser beam, it is reflected by N mirrors in sequence in the transmission section to form a non-linear optical path, and then the laser beam is transmitted to the output module, where N is an integer greater than 2.

[0025] In one embodiment, before the step of the output module outputting a laser beam, it further includes detecting stray light in the output module and transmitting the detected stray light power to the processor, and the processor adjusts the position of the receiving module and the laser output angle according to this power value.

[0026] In one embodiment, the step of the output module receiving the laser beam transmitted by the conduction module further includes at least a part of the output module receiving the laser beam output by the conduction module inside the wall, and making the laser beam pass through at least a part of the wall before outputting.

[0027] Beneficial effects:

[0028] A laser transmission device and a laser transmission method provided by the present invention transmit a laser beam from the outside of the wall to the inside of the wall through a transmission section arranged inside the wall. A laser cutting device is arranged inside the wall. The output module transmits the laser beam to the cutting head of the laser cutting device to perform laser cutting on the spent fuel rod in the radiation space, solving the problem that the cutting head needs to be frequently replaced in the prior art. And this laser transmission device arranges the laser that cannot withstand radiation outside the wall, which is convenient for protecting and maintaining the laser. Using the transmission section to transmit the laser from outside the hot cell to inside the hot cell, the optical path design is ingenious, which not only ingeniously solves the problem of the disintegration of the spent fuel rod in the hot cell but also improves the efficiency of the disintegration of the spent fuel rod. At the same time, the laser transmission device provided by the present invention does not need to frequently replace components, saving time cost and cost. Description of the drawings

[0029] Figure 1 It is a schematic structural diagram of a laser transmission device in an embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the receiving module in an embodiment of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the translation adjustment mechanism in an embodiment of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the angle adjustment mechanism in an embodiment of the present invention;

[0033] Figure 5 It is a schematic structural diagram of the conduction module in an embodiment of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the output module in an embodiment of the present invention. Detailed implementation manners

[0035] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention will be provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0038] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0041] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] As Figure 1 shown, this embodiment provides a laser transmission device, including a laser 1, a receiving module 2, a conduction module 3 and an output module 4. The laser 1 is used to generate a laser beam and output it to the receiving module 2 through an armored cable. After the receiving module 2 receives the laser beam output by the armored cable, it transmits the laser beam to the conduction module 3. The conduction module 3 includes a transmission section located inside the wall. The transmission section is used to transmit the laser beam received by the conduction module 3 through at least a part of the wall. The output module 4 is used to receive the laser beam transmitted by the conduction module and output the laser beam. The wall encloses a hot cell, which has high radioactivity. The outside of the wall is a free space, and the inside of the wall is a radiation space. A laser transmission device provided in this embodiment transmits the laser beam from the outside of the wall to the inside of the wall through a transmission section provided inside the wall. A laser cutting device is provided inside the wall. The output module 4 transmits the laser beam to the cutting head 5 of the laser cutting device to perform laser cutting on the spent fuel rod in the radiation space, improving the safety performance. Laser cutting solves the problem that the cutting head of the prior art needs to be frequently replaced. And this laser transmission device sets the laser 1 that cannot withstand radiation outside the wall, which is convenient for the protection and maintenance of the laser 1. Using the transmission section to transmit the laser from outside the hot cell to inside the hot cell, the optical path design is ingenious. It not only ingeniously solves the problem of the disintegration of the spent fuel rod in the hot cell but also improves the efficiency of the disintegration of the spent fuel rod. A laser transmission device provided in this embodiment does not need to frequently replace components, saving time cost and cost.

[0043] In one embodiment, the laser 1 and the receiving module 2 are disposed outside the wall and are located outside the wall, that is, outside the hot cell, to protect the laser 1 and the receiving module 2 from the radiation of the hot cell.

[0044] As Figure 2As shown, in one embodiment, the receiving module 2 can adjust the angle of the laser beam transmitted to the conduction module 3. The receiving module 2 includes an optical fiber end cap 201, a collimating lens 202, and a first mirror 203. The divergent laser beam emitted by the optical fiber end cap 201 becomes a collimated laser beam after passing through the collimating lens 202. The collimated laser beam is transmitted to the conduction module 3 after being reflected by the first mirror 203. The collimating lens 202 can be displaced in the x, y, and z directions to change its relative position in the transmission optical path, so as to adjust the divergent laser beam into a collimated laser beam. The first mirror 203 can be rotated to change the angles of the received laser beam and the reflected laser beam. The conduction module 3 is an optical fiber. Adjusting the relative position of the collimating lens 202 and the angle of the first mirror 203 are both to maximize the alignment of the laser beam with the core of the conduction module 3. Exemplarily, the collimating lens 202 is connected to a translation adjustment mechanism, and the first mirror 203 is connected to an angle adjustment mechanism.

[0045] As Figure 3 As shown, in one embodiment, the collimating lens 202 is connected to a translation adjustment mechanism. The translation adjustment mechanism can adjust the displacement of the collimating lens 202 in the x, y, and z directions, and specifically includes a first manual micrometer head 2021, a first spring 2024, a second micrometer head 2023, a second spring 2022, a handwheel 2025, a lens barrel 2026, and a lens holder 2027. When the first micrometer head 2021 is rotated clockwise, the first spring 2024 is compressed, which can push the collimating lens 202 to move in the +y direction. When the first micrometer head 2021 is rotated counterclockwise, the spring 2024 gradually returns to its original position, pushing the collimating lens 202 to move in the -y direction. Similarly, the second micrometer head 2023 and the second spring 2022 can control the movement of the lens in the ±x direction. The collimating lens 202 is installed in the lens holder 2027. One end of the lens barrel 2026 is connected to the lens holder 2027, and the other end is threadedly connected to the handwheel 2025. By rotating the handwheel 2025, the lens barrel 2026 can move in the ±z direction, thereby driving the collimating lens to move in the ±z direction. The +z direction is the laser transmission direction.

[0046] As Figure 4As shown, in one embodiment, the first mirror 203 is connected to an angle adjustment mechanism. The angle adjustment mechanism includes a lens holder 2034, a fixed mount 2033, a first displacement pushing device 2031, and a second displacement pushing device 2032. The first mirror 203 is installed in the lens holder 2034. The lens holder 2034 is installed on the fixed mount 2033 and the position of the lens holder 2034 is adjustable. The angle adjustment mechanism is the first displacement pushing device 2031 and the second displacement pushing device 2032 disposed at the diagonal positions of the lens holder 203 and the fixed mount 2033. The first displacement pushing device 2031 and the second displacement pushing device 2032 pass through the fixed mount 2033 and are connected to the lens holder 2034. By changing the distance that the first displacement pushing device 2031 and the second displacement pushing device 2032 pass through the fixed mount 2033, the yaw of the lens holder 2034 relative to the mirror mount 2033 can be pushed, thereby realizing the deflection angle adjustment of the first mirror 203. Exemplarily, increasing the length of the first displacement pushing device 2031 passing through the fixed mount 2033 pushes the lens holder 2034 to yaw to achieve the purpose of adjusting the reflection angle of the first mirror 203. Reducing the length of the first displacement pushing device 2031 passing through the fixed mount 2033 can adjust the first mirror 203 to yaw in the opposite direction. The principle of the second displacement pushing device 2032 for adjusting the angle of the first mirror 203 is the same and will not be elaborated here. The first displacement pushing device 2031 and the second displacement pushing device 2032 can be screws. By rotating and adjusting the distances of the screws at different positions passing through the fixed mount 2033, the yaw of the lens holder 2034 relative to the fixed mount 2033 can be pushed, thereby realizing the angle adjustment of the first mirror 203. It can be understood that the angle adjustment mechanism can also be a rotary motor, and the rotary motor is connected to the angle of the lens holder 2034, thereby realizing the angle adjustment of the first mirror 203.

[0047] As Figure 5As shown, in one embodiment, the transmission optical path of the transmission section is non-linear. Exemplarily, a second mirror 301 and a third mirror 302 are provided in the transmission section. The optical paths of the second mirror 301 and the third mirror 302 are in communication, and a "Z"-shaped optical path is formed after two reflections of the laser beam. The second mirror 301 is disposed at the first turning angle of the "Z"-shaped optical path, and the third mirror 302 is disposed at the second turning angle of the "Z"-shaped optical path. The reflecting surfaces of the second mirror 301 and the third mirror 302 are oppositely disposed and parallel to each other. It can be understood that the provision of the two mirrors, i.e., the second mirror 301 and the third mirror 302, is only an example of the non-linear transmission optical path. On the basis of this example content, N mirrors can also be provided in the transmission section. The N mirrors jointly form a communicating optical path, so that the transmission optical path of the transmission section is non-linear, where N is an integer greater than 2. The non-linear transmission optical path of the transmission section avoids the leakage of the radiation in the hot chamber to the outside of the hot chamber through this optical path channel. When the transmission section is provided to pass through a part of the wall, the laser beam can partially pass through the wall; when the transmission section is provided to pass through the entire wall, the laser beam can pass through the entire wall for transmission, that is, at this time, the laser beam can be transmitted from the outside of the wall to the inside of the wall.

[0048] In one embodiment, the outside of the optical path of the transmission section is wrapped with a radiation-proof material 303 to prevent the radiation from damaging the transmission section.

[0049] As Figure 6 As shown, in one embodiment, the output module 4 includes a focusing lens 401, a transmission optical fiber 402, and a stray light detector 403. The transmission optical fiber 402 includes a core 4021 and a cladding 4022 wrapped outside the core. The refractive index of the core of the transmission optical fiber 402 is higher than that of the cladding. The laser beam output by the conduction module 3 is focused by the focusing lens 401 and then transmitted into the core 4021 of the transmission optical fiber 402 for further forward transmission. The laser that is not coupled into the core 4021 is transmitted forward in the cladding 4022. The transmission optical fiber 402 includes a light leakage section 4023, and a light leakage groove 4024 is provided in the cladding of the light leakage section 4023. The laser is transmitted from the light leakage groove 4024 to the outside of the optical fiber 402. The stray light detector 403 is used to detect the power of the laser leaking from the light leakage groove 4024. When the stray light detector 403 detects the power of the laser, an alarm prompt is given or the detected power value is displayed, to prompt the user of the degree of the laser that is not coupled into the core 4021, and to prompt the user to adjust the translation adjustment mechanism connected to the collimating lens 202 and / or the angle adjustment mechanism connected to the first mirror 203. The smaller the power detected by the stray light detector 403, the better. When the power value is almost zero, it can be considered that all the laser is coupled into the core 4021 and finally transmitted to the laser cutting head 5.

[0050] In one embodiment, the output module 4 may be disposed outside the wall and on the inner side of the wall, that is, the output module 4 receives the laser beam output by the conduction module 3 in the hot chamber; the output module 4 may also be disposed inside the wall, at the rear end of the conduction module 3, and the laser beam is transmitted between the conduction module 3 and the output module 4 in the wall and finally transmitted to the laser cutting head 5 in the hot chamber.

[0051] In one embodiment, a laser transmission device further includes a processor (not shown in the figure), the processor is communicatively connected to the stray light detector 403, the translation adjustment mechanism and the angle adjustment mechanism, the laser power detected by the stray light detector 403 is transmitted to the processor, and the processor controls the displacement of the translation adjustment mechanism and / or the angle of rotation of the angle adjustment mechanism according to the power value, so as to make the laser beam align with the core 4021 for transmission until the power value detected by the stray light detector 403 is close to zero. Among them, the displacement adjustment of the collimating lens 202 is a preset displacement adjustment, advancing or retreating 1 mm to 5 mm in each of the x, y, and z directions. Exemplarily, it advances or retreats 2 mm, 3 mm, or 4 mm each time; the angle adjustment of the first mirror 203 is a preset angle adjustment, and the angle is adjusted by 0.5° to 5° each time. Exemplarily, the angle is adjusted by 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, or 4.5° each time, and the direction of angle change can be clockwise or counterclockwise.

[0052] In one embodiment, a laser transmission method is further provided, including the following steps: a laser generator generates a laser beam and transmits it to a receiving module through an armored cable; after receiving the laser beam output by the armored cable, the receiving module transmits the laser beam to a conduction module; the conduction module includes a transmission section located inside the wall, and the transmission section transmits the laser beam received by the conduction module through at least a part of the wall and transmits it to an output module; the output module is configured to receive the laser beam transmitted by the conduction module and output the laser beam.

[0053] In one embodiment, the path of the transmission section for transmitting the laser beam is non-linear.

[0054] In one embodiment, after receiving the laser beam, the conduction module reflects the laser beam through a second mirror and a third mirror in sequence in the transmission section to form a Z-shaped optical path and then transmits the laser beam to the output module.

[0055] In one embodiment, after receiving the laser beam, the conduction module reflects the laser beam through N mirrors in sequence in the transmission section to form a non-linear optical path and then transmits the laser beam to the output module, where N is an integer greater than 2.

[0056] In one embodiment, before the step of the output module outputting a laser beam, it further includes detecting stray light in the output module and transmitting the detected stray light power to the processor. The processor adjusts the position of the receiving module and the laser output angle according to this power value. Specifically, the processor controls the displacement of the translation adjustment mechanism and / or the angle of rotation of the angle adjustment mechanism according to this power value, so as to prompt the laser beam to be aligned with the core for transmission until the power value detected by the stray light detector approaches zero.

[0057] In one embodiment, the step of the output module receiving the laser beam transmitted by the conduction module further includes at least a part of the output module receiving the laser beam output by the conduction module inside the wall, and making the laser beam pass through at least a part of the wall before outputting.

[0058] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0059] Specific examples are used in the present invention to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, there will be changes in the specific implementation manner and application scope according to the idea of the present invention. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A laser transmission device, comprising a laser, a receiving module, a conducting module and an output module, wherein the laser is used to generate a laser beam and output it to the receiving module through an armored cable, and the receiving module transmits the laser beam to the conducting module after receiving the laser beam output by the armored cable, characterized in that: The receiving module includes an optical fiber end cap, a collimating lens and a first reflector. The divergent laser beam emitted by the optical fiber end cap becomes a collimated laser beam through the collimating lens. The collimated laser beam is transmitted to the transmission module after being reflected by the first reflector. The collimating lens is displaced in three directions of x, y and z. The first reflector can rotate. The receiving module can adjust the angle of the laser beam transmitted to the transmission module. The transmission module includes a transmission section located inside the wall. The transmission section is used to transmit the laser beam received by the transmission module through at least a part of the wall. A second reflector and a third reflector are arranged in the transmission section. The optical paths of the second reflector and the third reflector are connected. After reflecting the laser beam twice, a "Z"-shaped optical path is formed. The second reflector is arranged at a first corner of the "Z"-shaped optical path. The third reflector is arranged at a second corner of the "Z"-shaped optical path. The reflection surfaces of the second reflector and the third reflector are arranged opposite to each other and are parallel to each other. The outer side of the optical path of the transmission section is wrapped with radiation-proof material. The output module is used to receive the laser beam transmitted by the transmission module and output the laser beam.

2. A laser transmission device according to claim 1, characterized in that: The laser and the receiving module are arranged outside the wall and are located outside the wall.

3. A laser transmission device according to claim 1, characterized in that: The collimating lens is connected with a translation adjustment mechanism, which includes a first manual differential head, a first spring, a second differential head, a second spring, a hand wheel, a lens barrel and a lens frame. The collimating lens is arranged between the first manual differential head and the first spring. The first manual differential head is rotated clockwise to push the collimating lens to move in the +y direction, and the first manual differential head is rotated counterclockwise to push the collimating lens to move in the -y direction; the collimating lens is also arranged between the second differential head and the second spring. The second differential head is rotated clockwise to push the collimating lens to move in the +x direction, and the second differential head is rotated counterclockwise to push the collimating lens to move in the -x direction; the collimating lens is installed in the lens frame, one end of the lens barrel is connected to the lens frame, and the other end is threadedly connected to the hand wheel. Rotating the hand wheel can move the lens barrel in the ±z directions, thereby driving the collimating lens to move in the ±z directions.

4. A laser transmission device according to claim 1, characterized in that: The first reflector is connected to an angle adjustment mechanism, which includes: a lens holding frame, a fixed frame, a first displacement pushing device and a second displacement pushing device. The first reflector is installed in the lens holding frame, and the lens holding frame is installed on the fixed frame. The first displacement pushing device and the second displacement pushing device pass through the fixed frame and are connected to the lens holding frame. By changing the distance through which the first displacement pushing device and the second displacement pushing device pass through the fixed frame, the lens holding frame can be pushed to deflect relative to the frame mounting seat, thereby realizing the adjustment of the deflection angle of the first reflector.

5. A laser transmission device according to claim 1, characterized in that: The output module includes a focusing lens, a transmission optical fiber and a stray light detector. The transmission optical fiber includes a core and a cladding wrapped around the outside of the core. The laser beam output by the conduction module is focused by the focusing lens and then transmitted to the core of the transmission optical fiber to continue to transmit forward. The light not coupled into the core is transmitted forward in the cladding. The transmission optical fiber includes a light leakage section. The cladding of the light leakage section is provided with a light leakage groove. The laser beam is transmitted from the light leakage groove to the outside of the optical fiber. The stray light detector is used to detect the power of the laser leaking from the light leakage groove.

6. A laser transmission device according to claim 1, characterized in that: The output module can be arranged outside the wall and located inside the wall, or the output module can be arranged inside the wall.

7. A laser transmission device according to claim 5, characterized in that: It also includes a processor, which is communicatively connected with the stray light detector, the translation adjustment mechanism and the angle adjustment mechanism. The laser power detected by the stray light detector is transmitted to the processor, and the processor controls the displacement of the translation adjustment mechanism and / or controls the rotation angle of the angle adjustment mechanism according to the detected laser power.

8. A laser transmission method, characterized in that: The following steps are involved: The laser generates a laser beam which is transmitted to the receiving module through the armored cable; After receiving the laser beam output by the armored cable, the receiving module transmits the laser beam to the conducting module. The receiving module includes an optical fiber end cap, a collimating lens and a first reflector. The divergent laser beam emitted by the optical fiber end cap passes through the collimating lens to become a collimated laser beam. The collimated laser beam is reflected by the first reflector and then transmitted to the conducting module. The collimating lens is displaced in the three directions of x, y and z. The first reflector can rotate. The receiving module can adjust the angle of the laser beam transmitted to the conducting module. The conduction module includes a transmission section located inside the wall, the transmission section transmits the laser beam received by the conduction module through at least a part of the wall and to the output module, after receiving the laser beam, the conduction module sequentially reflects through a second reflector and a third reflector in the transmission section to form a Z-shaped optical path and then transmits the laser beam to the output module, the second reflector is arranged at a first corner of the "Z"-shaped optical path, the third reflector is arranged at a second corner of the "Z"-shaped optical path, the reflection surfaces of the second reflector and the third reflector are arranged opposite to each other and parallel to each other, and the outer side of the optical path of the transmission section is wrapped with a radiation-proof material; The output module is used to receive the laser beam transmitted by the conduction module and output the laser beam.

9. A laser transmission method according to claim 8, characterized in that: Before the step of the output module outputting the laser beam, the step also includes detecting stray light in the output module and transmitting the detected laser power to the processor, and the processor adjusts the position of the receiving module and the laser output angle according to the detected laser power.

10. A laser transmission method according to claim 8, characterized in that: The step of the output module receiving the laser beam transmitted by the conduction module also includes at least a part of the output module receiving the laser beam output by the conduction module inside the wall, and allowing the laser beam to pass through at least a part of the wall before outputting.

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