In-situ monitoring dark field imaging device

Abstract

The invention discloses an in-situ monitoring dark field imaging device which comprises an imaging machine shell, and an optical lens, a light source assembly and a telecentric optical lens which are coaxially distributed are sequentially arranged in the imaging machine shell. One end of the telecentric optical lens is connected with an image acquisition sensor, and the image acquisition sensor is in signal connection with an industrial control unit and a control module; the light source assembly comprises an installation table, an installation disc is arranged in the installation table, a plurality of light source plates which are arranged in an inclined state are fixedly connected to the installation disc in the circumferential direction of the installation disc, and at least one light-emitting lamp is installed on each light source plate. Through the design of the light source assembly and the telecentric optical lens in the same direction, a target in the foreground depth of the lens can be imaged without being influenced by a front obstacle, and the structural contour and texture of the target object are clearly presented in a sidelight form; the irradiation direction of the annular light source is adjustable, and the technical problems that in the prior art, an imaging device is small in working area and poor in image collection quality are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dark field imaging, and in particular to an in-situ monitoring dark field imaging device. Background Art

[0002] In-situ monitoring of underwater plankton has extremely high application demand in ecological research, ecological protection, ecological restoration, etc. Optical imaging is an important monitoring method. Currently, the imaging equipment used mainly adopts remote sensing imaging, bright field imaging or dark field imaging and other technologies.

[0003] In the prior art, the equipment used for in-situ monitoring of marine plankton uses dark field imaging technology, which mainly uses telecentric lenses or wide-angle lenses for imaging. However, the equipment using telecentric lenses for imaging has the disadvantages of small working area and poor image acquisition quality. Summary of the invention

[0004] The purpose of the present invention is to provide an in-situ monitoring dark field imaging device, which solves the technical problems of small working area and poor image acquisition quality of the imaging device in the prior art.

[0005] To achieve this object, the present invention adopts the following technical solutions: An in-situ monitoring dark field imaging device comprises: an imaging housing, wherein a coaxially distributed optical lens, a light source assembly and a telecentric optical lens are sequentially arranged in the imaging housing; an image acquisition sensor is connected to one end of the telecentric optical lens, and the image acquisition sensor signal is connected to an industrial control unit and a control module; The light source assembly comprises a mounting platform, a mounting plate is provided in the mounting platform, a plurality of light source boards arranged in an inclined state are fixedly connected to the mounting plate along its circumference, and at least one light emitting lamp is installed on each of the light source boards; Among them, the imaging working area in front of the optical lens is the imaging area of ​​the in-situ monitoring dark field imaging device, and the light emitted by each of the light-emitting lamps covers the entire imaging working area. After the direct light is irradiated to the target object, the light is reflected into the telecentric optical lens for dark field imaging.

[0006] Optionally, a cleaning component is also included, which is used to clean the optical lens and is electrically connected to the control module.

[0007] Optionally, the number of the cleaning components is set to two, and the two cleaning components are diagonally arranged.

[0008] Optionally, the cleaning assembly includes a mounting seat fixedly connected to the imaging housing, the mounting seat is provided with a driving member, the driving member is connected to a mounting frame rotatably connected to the imaging housing, and the mounting frame is provided with a cleaning rubber strip in contact with the optical lens; The driving member is used to drive the mounting frame to rotate, so that the mounting frame drives the cleaning rubber strip to swing and clean.

[0009] Optionally, the mounting frame comprises a rotating rod, a rotating block and a mounting bar which are connected in sequence, the rotating rod is clamped with a driving shaft of the driving member, and the rotating rod is rotatably connected in the imaging housing; The rotating block is arranged in an L shape, the mounting strip and the rotating rod are arranged vertically, and the cleaning rubber strip is embedded and clamped in the mounting strip.

[0010] Optionally, a decorative strip is sleeved on the outer wall of the mounting strip, the mounting strip and the decorative strip are fastened and installed by screws, and the end surface of the decorative strip is flush with the end surface of the rotating block.

[0011] Optionally, a reflector plate arranged parallel to the optical lens is hinged on the cleaning component, and the reflector plate is used to reflect the light emitted by the light-emitting lamp into the imaging working area; a positioning groove is provided on the cleaning component, and a positioning protrusion is provided on the reflector plate, and the positioning protrusion is interference fit with the positioning groove.

[0012] Optionally, the reflective plate is provided with a plurality of guide holes penetrating through two opposite ends thereof.

[0013] Optionally, the imaging housing comprises an imaging front cabin and an imaging rear cabin which are connected to each other, the optical lens, the light source assembly and an imaging front cover are installed in the imaging front cabin, and the imaging front cover is used to press the optical lens and the mounting seat.

[0014] Optionally, a groove and a mounting groove are provided on the end surface of the front imaging cabin body, and a convex ring plugged into and matched with the groove is provided on the end surface of the rear imaging cabin body. Both the groove and the mounting groove are arranged in an annular shape, and the mounting groove is used to install a waterproof ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an in-situ monitoring dark field imaging device, which can image the target within the depth of field of the lens without being affected by obstacles in front through the same direction design of the light source component and the telecentric optical lens, and can clearly present the structural contour and texture of the target object in the form of side light; the illumination direction of the ring light source is adjustable, which solves the technical problems of small working area and poor image acquisition quality of the imaging device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Figure 2 It is a front view of an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Figure 3 It is a schematic diagram of the AA cross-sectional structure of an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B; Figure 5 A schematic diagram of an explosion structure of an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Figure 6 A schematic diagram of the three-dimensional structure of a light source assembly in an in-situ monitoring dark-field imaging device disclosed in an embodiment of the present invention; Figure 7 A schematic diagram of the explosion structure of a light source assembly in an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Figure 8 A schematic diagram of the three-dimensional structure of a cleaning component in an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Fig. 9 A schematic diagram of an explosion structure of a cleaning component in an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Fig.10 It is a structural schematic diagram of an imaging front cabin in an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Fig.11 A working principle diagram of an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Fig.12A partial bottom view of a reflector in use in an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention; Fig.13 yes Fig.12 A schematic diagram of the enlarged structure at C; Fig.14 It is a schematic diagram of the three-dimensional structure of a reflector in an in-situ monitoring dark field imaging device disclosed in an embodiment of the present invention.

[0019] Illustrations: 10. Imaging housing; 11. Imaging front cabin; 111. Groove; 112. Mounting slot; 12. Imaging rear cabin; 121. Raised ring; 13. Imaging front cover; 20. Optical lens; 30. Light source assembly; 31. Mounting table; 32. Mounting plate; 33. Light source board; 34. Light-emitting lamp; 40. Telecentric optical lens; 50. Image acquisition sensor; 60. Industrial control unit; 70. Control module; 80. Cleaning assembly; 81. Mounting seat; 82. Driving member; 83. Mounting frame; 831. Rotating rod; 832. Rotating block; 833. Mounting strip; 834. Decorative strip; 835. Positioning slot; 84. Cleaning rubber strip; 90. Connector; 100. First fixing frame; 110. Second fixing frame; 120. Battery module; 140. Reflector; 141. Positioning convex block; 142. Air guide hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0023] The embodiment of the present invention provides an in-situ monitoring dark field imaging device, such as Figure 1-11As shown, it comprises: an imaging housing 10, in which a coaxially distributed optical lens 20, a light source assembly 30 and a telecentric optical lens 40 are sequentially arranged; one end of the telecentric optical lens 40 is connected to an image acquisition sensor 50, and the image acquisition sensor 50 is signal-connected to an industrial control unit 60 and a control module 70, and the control module 70 is used to control the working state of the in-situ monitoring dark field imaging device; The light source assembly 30 includes a mounting platform 31, a mounting plate 32 is provided inside the mounting platform 31, and a plurality of light source boards 33 arranged in an inclined state are fixedly connected to the mounting plate 32 along its circumference, and at least one light emitting lamp 34 is installed on each light source board 33; in this embodiment, the number of the light emitting lamps 34 is four; by changing the mounting direction of the light source board 33, the irradiation direction of the light emitting lamp 34 can be adjusted; Among them, the imaging working area in front of the optical lens 20 is the imaging area of ​​the in-situ monitoring dark field imaging device. The light emitted by each light lamp 34 covers the entire imaging working area. After the direct light is irradiated to the target object, the light is reflected into the telecentric optical lens 40 for dark field imaging.

[0024] It should be noted that the in-situ monitoring dark field imaging device provided by the present invention has a light source assembly 30 and a telecentric optical lens 40 designed in the same direction. The illumination of the ring light source covers the entire imaging working area, and can image the target within the depth of field of the lens without being affected by obstacles in front, and clearly present the structural contour and texture of the target object in the form of side light; the illumination direction of the ring light source is adjustable, which solves the technical problems of the small working area and poor image acquisition quality of the imaging device in the prior art.

[0025] like Figure 1 and Figure 8 As shown, a cleaning assembly 80 is also included, which is used to clean the optical lens 20 and is electrically connected to the control module 70. It should be noted that the optical lens 20 is cleaned by the cleaning assembly 80 to prevent marine organisms from attaching to the optical lens 20.

[0026] like Figure 1 As shown, the number of cleaning components 80 is set to two, and the two cleaning components 80 are arranged diagonally. It should be noted that since the two cleaning components 80 are arranged diagonally, the cleaning area of ​​the optical lens 20 is increased, ensuring that the in-situ monitoring dark field imaging device can operate normally. Because the area of ​​the optical lens 20 is large, the two diagonally arranged cleaning components 80 need to perform alternating cleaning operations to prevent marine organisms from attaching to the optical lens, ensuring that the in-situ monitoring dark field imaging device provided by the present invention can smoothly perform in-situ monitoring of marine organisms.

[0027] like Figure 1 , Figure 8 and Fig. 9As shown, the cleaning assembly 80 includes a mounting seat 81 fixedly connected to the imaging housing 10, a driving member 82 is provided on the mounting seat 81, a mounting frame 83 rotatably connected to the imaging housing 10 is connected to the driving member 82, and a cleaning rubber strip 84 in contact with the optical lens 20 is installed on the mounting frame 83; The driving member 82 is used to drive the mounting frame 83 to rotate, so that the mounting frame 83 drives the cleaning rubber strip 84 to swing and clean. It should be noted that the cleaning rubber strip 84 is formed by injection molding, and the driving member 82 is a driving motor; through the driving action of the driving member 82, the mounting frame 83 is driven to rotate, so that the mounting frame 83 drives the cleaning rubber strip 84 to swing, and the cleaning rubber strip 84 cleans the optical lens 20, and the optical lens 20 is cleaned regularly to prevent biological attachment, so that the in-situ monitoring dark field imaging device provided by the present invention can be used for marine monitoring for a long time.

[0028] like Figure 8 and Fig. 9 As shown, the mounting frame 83 includes a rotating rod 831, a rotating block 832 and a mounting bar 833 connected in sequence, the rotating rod 831 is engaged with the driving shaft of the driving member 82, and the rotating rod 831 is rotatably connected to the imaging housing 10; The rotating block 832 is arranged in an L shape, the mounting strip 833 and the rotating rod 831 are arranged vertically, and the cleaning rubber strip 84 is embedded and clamped in the mounting strip 833. In this embodiment, the rotating rod 831, the rotating block 832 and the mounting strip 833 are fastened and connected in sequence by screws (not shown). A waterproof ring (not shown) is sleeved on the rotating rod 831 for waterproofing.

[0029] It should be noted that, through the driving action of the driving member 82, the rotating rod 831, the rotating block 832 and the mounting strip 833 are driven to rotate synchronously, thereby driving the cleaning strip 84 to swing on the optical lens 20, which can effectively clean the optical lens 20, so that the in-situ monitoring dark field imaging device provided by the present invention can be used for ocean monitoring for a long time.

[0030] like Figure 8 and Fig. 9 As shown, the outer wall of the mounting strip 833 is provided with a decorative strip 834, and the mounting strip 833 and the decorative strip 834 are fastened and installed by screws (not shown), and the end surface of the decorative strip 834 is flush with the end surface of the rotating block 832. It should be noted that the arrangement of the decorative strip 834 makes the appearance of the in-situ monitoring dark field imaging device more beautiful.

[0031] like Figure 12-14As shown, each cleaning assembly 80 is hinged with a reflector 140 arranged parallel to the optical lens 20, and the reflector 140 is used to reflect the light emitted by the light-emitting lamp 34 into the imaging work area; the cleaning assembly 80 is provided with a positioning groove 835, and the reflector 140 is provided with a positioning protrusion 141, and the positioning protrusion 141 is interference-fitted with the positioning groove 835. In this embodiment, the reflector 140 is hinged with the decorative strip 834 and the rotating block 832 respectively, and the number of the positioning protrusion 141 and the positioning groove 835 is set to two, and the positioning protrusion 141 and the reflector 140 are an integrally formed structure, and the outer wall surface of the positioning protrusion 141 is arranged in an arc surface, one of the positioning grooves 835 is opened on the decorative strip 834, and the other positioning groove 835 is opened on the rotating block 832; through the interference fit between the positioning protrusion 141 and the positioning groove 835, the reflector 140 can be fastened and installed on the cleaning assembly 80.

[0032] When the reflector 140 is working, the reflector 140 is manually flipped open, the reflector 140 is flipped 90 degrees, and the positioning protrusion 141 is separated from the positioning groove 835. When the in-situ monitoring dark field imaging device vertically monitors marine life, the light source assembly 30 provides annular light to the imaging work area. The reflector 140 is in a vertical state when working. When the emitted light shines on the reflector 140, the light is reflected into the imaging work area, achieving light gathering and improving the light intensity, thereby improving the image acquisition quality of the dark field imaging device.

[0033] like Figure 12-14 As shown, the reflector 140 is provided with a plurality of guide holes 142 passing through opposite ends thereof. In this embodiment, the number of guide holes 142 of each reflector 140 is set to eight. The reflector 140 may be a polyethylene foam plate, or may be made of fiberglass reinforced plastic (FRP) or polycarbonate.

[0034] It should be noted that the guide hole 142 is a circular hole. By setting the guide hole 142, the weight of the reflector 140 can be reduced, thereby reducing the overall weight of the in-situ monitoring dark field imaging device; in addition, the guide hole 142 plays a diversion role. When the in-situ monitoring dark field imaging device is in cleaning mode, the reflector 140 is fastened to the cleaning component 80 through the interference fit between the positioning protrusion 141 and the positioning groove 835; when the driving member 82 drives the cleaning strip 84 for cleaning, it also drives the reflector 140 to move. Due to the diversion effect of the guide hole 142, water can flow out of the guide hole 142, thereby reducing the movement resistance of the reflector 14, making it easier for the driving member 82 to smoothly drive the cleaning strip 84 to clean the optical lens 20, thereby saving the driving kinetic energy of the driving member 82.

[0035] like Figure 1-11As shown, the imaging housing 10 is made of polyoxymethylene material, and a connector 90 electrically connected to the control module 70 is installed at one end of the imaging housing 10 opposite to the lens. It should be noted that since the imaging housing 10 is made of polyoxymethylene material, the imaging housing 10 is resistant to seawater corrosion and can be used for marine monitoring for a long time. The external power supply and communication network equipment are connected through the connector 90, so that the normal operation of the in-situ monitoring dark field imaging device is realized.

[0036] like Figure 3 and Figure 5 As shown, the imaging housing 10 includes an imaging front cabin 11 and an imaging rear cabin 12 connected to each other, and an optical lens 20, a light source assembly 30 and an imaging front cover 13 are installed in the imaging front cabin 11, and the imaging front cover 13 is used to press the optical lens 20 and the mounting seat 81. In this embodiment, the imaging front cabin 11 and the imaging rear cabin 12 are fastened and connected by screws, and the screws pass through the imaging front cover 13 and the mounting platform 31 and are fastened and connected to the imaging front cabin 11, so that the imaging front cover 13 presses the optical lens 20 and the mounting seat 81, ensuring that the optical lens 20 and the light source assembly 30 are coaxially distributed.

[0037] It should be noted that two layers of waterproof rings are installed between the imaging front cover 13 and the mounting platform 31 for protecting the light source assembly 30, and two layers of waterproof rings are installed between the mounting platform 31 and the imaging front cabin 11 for protection; through the setting of the above-mentioned waterproof rings, the in-situ monitoring dark field imaging device can be effectively sealed and waterproofed, ensuring that the in-situ monitoring dark field imaging device provided by the present invention can be used for long-term in-situ monitoring of marine organisms.

[0038] like Figure 3 , Figure 4 and Fig.10 As shown, a groove 111 and a mounting groove 112 are provided on the end surface of the imaging front cabin 11, and a convex ring 121 is provided on the end surface of the imaging rear cabin 12 to be plugged and matched with the groove 111. The groove 111 and the mounting groove 112 are both arranged in an annular shape, and the mounting groove 112 is used to install and place a waterproof ring (not shown). In the specific implementation process, the number of the mounting grooves 112 is set to two, and by providing two layers of waterproof rings (not shown), the front imaging cabin 11 and the rear imaging cabin 12 can be better sealed, thereby ensuring that the in-situ monitoring dark field imaging device can perform long-term ocean monitoring.

[0039] like Figure 3 and Figure 5As shown, the imaging front cabin 11 is fixedly connected with a first fixing frame 100 and a second fixing frame 110, the first fixing frame 100 is used to sleeve and fix the telecentric optical lens 40; the second fixing frame 110 is used to fix and install the control module 70, the industrial control unit 60 and the battery module 120. In this embodiment, the imaging front cabin 11 is respectively connected to the first fixing frame 100 and the second fixing frame 110 by screws, wherein the industrial control unit 60 is fixedly installed on one end surface of the second fixing frame 110, and the control module 70 and the battery module 120 are fixedly installed on the other end surface of the second fixing frame 110. It should be noted that the device is powered by the battery module 120.

[0040] Working principle: After the in-situ monitoring dark field imaging device provided by the present invention is powered on, the industrial control unit 60 is first started, the reflector 140 is manually opened, and then the data acquisition software is started through the control module 70. The data acquisition software controls the image acquisition sensor 50 and the light source assembly 30 to perform synchronous pulse operation. The target object is imaged in the dark field through the telecentric optical lens 40. The image acquisition sensor 50 acquires images of the monitored target object, and the acquired data is stored by the industrial control unit 60 or synchronized to the host computer; When the cleaning component 80 is required to work, the reflector 140 is manually closed, and the positioning protrusion 141 is inserted into the positioning groove 835 to make the reflector 140 fastened and laid flat on the mounting frame 83; then the mounting frame 83 is driven to rotate by the driving member 82, thereby driving the mounting frame 83 and the cleaning strip 84 to rotate, so that the cleaning strip 84 cleans the optical lens to prevent marine organisms from attaching to the optical lens; due to the setting of the guide hole 142, water can be accommodated to pass through, thereby reducing the movement resistance of the reflector 140, making it easier for the driving member 82 to smoothly drive the cleaning strip 84 to clean the optical lens 20, and saving the driving kinetic energy of the driving member 82.

[0041] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An in-situ monitoring dark field imaging device, characterized in that: The in-situ monitoring dark field imaging device comprises: an imaging housing (10), wherein coaxially distributed optical lenses (20), a light source assembly (30) and a telecentric optical lens (40) are sequentially arranged in the imaging housing (10); one end of the telecentric optical lens (40) is connected to an image acquisition sensor (50), and the image acquisition sensor (50) is signal-connected to an industrial control unit (60) and a control module (70); The light source assembly (30) comprises a mounting platform (31), a mounting plate (32) being provided inside the mounting platform (31), a plurality of light source panels (33) being fixedly connected along the circumference thereof and arranged in an inclined state, each of the light source panels (33) being mounted with at least one light emitting lamp (34); The imaging working area in front of the optical lens (20) is the imaging area of ​​the in-situ monitoring dark field imaging device, and the light emitted by each of the light emitting lamps (34) covers the entire imaging working area. After the target object is irradiated with direct light, the light is reflected into the telecentric optical lens (40) for dark field imaging.

2. The in-situ monitoring dark field imaging device according to claim 1, characterized in that: It also includes a cleaning component (80), which is used to clean the optical lens (20) and is electrically connected to the control module (70).

3. The in-situ monitoring dark field imaging device according to claim 2, characterized in that: The number of the cleaning components (80) is set to two, and the two cleaning components (80) are arranged diagonally.

4. The in-situ monitoring dark field imaging device according to claim 2 or 3, characterized in that: The cleaning assembly (80) comprises a mounting seat (81) fixedly connected to the imaging housing (10), a driving member (82) being provided on the mounting seat (81), a mounting frame (83) rotatably connected to the imaging housing (10) being connected to the driving member (82), and a cleaning rubber strip (84) in contact with the optical lens (20) being installed on the mounting frame (83); The driving member (82) is used to drive the mounting frame (83) to rotate, so that the mounting frame (83) drives the cleaning rubber strip (84) to swing and clean.

5. The in-situ monitoring dark field imaging device according to claim 4, characterized in that: The mounting frame (83) comprises a rotating rod (831), a rotating block (832) and a mounting bar (833) which are connected in sequence, the rotating rod (831) being clamped with a driving shaft of the driving member (82), and the rotating rod (831) being rotatably connected in the imaging housing (10); The rotating block (832) is arranged in an L shape, the mounting strip (833) and the rotating rod (831) are arranged vertically, and the cleaning rubber strip (84) is embedded and clamped in the mounting strip (833).

6. The in-situ monitoring dark field imaging device according to claim 5, characterized in that: The outer wall of the installation strip (833) is provided with a decorative strip (834), the installation strip (833) and the decorative strip (834) are fastened and installed by means of screws, and the end surface of the decorative strip (834) is flush with the end surface of the rotating block (832).

7. The in-situ monitoring dark field imaging device according to claim 2 or 3, characterized in that: A reflector (140) is hingedly connected to the cleaning component (80) and is arranged parallel to the optical lens (20); the reflector (140) is used to reflect light emitted by the light-emitting lamp (34) into an imaging work area; a positioning groove (835) is provided on the cleaning component (80); a positioning protrusion (141) is provided on the reflector (140); the positioning protrusion (141) is interference-fitted with the positioning groove (835).

8. The in-situ monitoring dark field imaging device according to claim 7, characterized in that: The reflective plate (140) is provided with a plurality of guide holes (142) penetrating through two opposite ends thereof.

9. The in-situ monitoring dark field imaging device according to any one of claims 1 to 3, characterized in that: The imaging housing (10) comprises an imaging front cabin (11) and an imaging rear cabin (12) which are connected to each other; the optical lens (20), the light source assembly (30) and an imaging front cover (13) are installed in the imaging front cabin (11); the imaging front cover (13) is used to press the optical lens (20) and the mounting seat (81) tightly.

10. The in-situ monitoring dark field imaging device according to claim 1, characterized in that: A groove (111) and a mounting groove (112) are provided on the end surface of the front imaging chamber (11), and a convex ring (121) pluggably engaged with the groove (111) is provided on the end surface of the rear imaging chamber (12); the groove (111) and the mounting groove (112) are both arranged in an annular shape, and the mounting groove (112) is used for mounting a waterproof ring.

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