A tunnel self-cleaning camera capable of automatically cleaning ash

Abstract

The application discloses a tunnel self-cleaning camera capable of automatically cleaning ash, relates to the technical field of tunnel monitoring, and comprises a shell, a lens is arranged in the shell, the lens is connected with the shell through a mounting disc, a transparent window is arranged at the end of the shell away from the mounting disc, the transparent window is connected with the shell through a fixing mechanism, and a horizontal moving module is arranged on the inner wall of the shell. Compared with the current tunnel camera, the application is provided with a blowing unit and a wiping unit. Through cooperation of the blowing unit and the wiping unit, step-by-step removal of common dust, oily smoke dust, snow-melting agent salt mist and other complex pollutants on the transparent window is realized. Through cooperation of the wiping unit and the fixing mechanism, the problem of monitoring blind area of the camera is avoided, comprehensive wiping of the transparent window is realized, the problem of cleaning dead angles easily left by traditional cleaning components at the edge of the transparent window is completely eliminated, and the image quality of tunnel monitoring is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel monitoring technology, specifically a tunnel self-cleaning camera capable of automatically removing dust. Background Technology

[0002] In tunnel engineering environments, surveillance cameras are one of the core devices to ensure the safe operation of tunnels. However, the interior space of a tunnel is relatively enclosed, and oily pollutants from vehicle exhaust mixed with dust can easily adhere to the surface of the camera, which can easily lead to blurry surveillance images and reduced image quality.

[0003] Currently, some tunnels have introduced cameras with self-cleaning functions. For example, the patent "CN223502953U A Maintenance and Management Device for Information Acquisition Cameras in Highway Tunnels" discloses a self-cleaning camera used in tunnels. However, existing self-cleaning cameras for tunnels generally have complex equipment structures and the cleaning components are prone to obstructing the camera when not in operation, thus causing blind spots in monitoring. At the same time, the cleaning components used in existing self-cleaning cameras for tunnels are also prone to aging and damage after long-term exposure to harsh environments, making it difficult to effectively deal with the complex pollution problems of multiple types of pollutants such as oily soot and salt spray. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to avoid the problem of poor cleaning effect and easy generation of blind spots in self-cleaning cameras, and to provide a tunnel self-cleaning camera that can automatically clean dust.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a tunnel self-cleaning camera capable of automatic dust removal, comprising a housing, an imaging lens installed inside the housing, the lens being detachably connected to the housing via a flange-type mounting plate, a transparent window being provided at the end of the housing away from the mounting plate, the transparent window being connected to the housing via a fixing mechanism, a horizontal moving module being provided on the inner wall of the housing, the working end of the horizontal moving module being connected to the outer wall of the fixing mechanism, the horizontal moving module controlling the movement of the fixing mechanism and the transparent window along the axis of the housing, a blowing unit being provided on the side of the transparent window away from the lens, a wiping unit being provided on the side of the transparent window closer to the lens, an anti-condensation unit being provided on the wall of the transparent window closer to the lens to prevent fog from condensing on the transparent window and affecting the imaging effect of the lens, a mounting base being provided on the outer wall of the housing, the mounting base being provided with a threaded interface, a connecting component being provided inside the mounting base, one end of the threaded interface being connected to the blowing unit via the connecting component, and the other end of the threaded interface being connected to an external compressed air delivery system and a cleaning fluid delivery system.

[0006] In this invention, the triggering actions of both the blowing unit and the wiping unit are controlled by a built-in or external control system. The operating logic for triggering the cleaning operation can be selected based on time triggering or contamination detection triggering (the above triggering mechanisms are conventional techniques in this field and will not be described in detail again). When the cleaning operation on the transparent window is not triggered, the transparent window is away from the lens. At this time, the side of the transparent window away from the lens is exposed to the external environment and close to the blowing unit. When cleaning of the transparent window is required, the external compressed air delivery system first delivers compressed air to the blowing unit to blow away ordinary dust adhering to the transparent window, and then the cleaning fluid is delivered. The system delivers cleaning fluid to the purging unit to remove oily soot (diesel exhaust, asphalt volatiles) or de-icing salt spray from the transparent window. After the initial cleaning of the transparent window is completed, the horizontal movement module drives the fixing mechanism and the transparent window to move closer to the lens until the wiping unit can contact and cover the wall exposed to the external environment. The wiping unit removes stubborn stains and residual cleaning fluid from the transparent window. Once the cleaning operation is completely finished, the horizontal movement module drives the fixing mechanism and the transparent window to return to their initial positions to facilitate subsequent lens imaging. Furthermore, the purging unit includes an air chamber with several nozzles arranged on the side of the air chamber near the transparent window. The spray direction of the nozzles is at an angle of 15° to 30° to the surface of the transparent window. When the external compressed air delivery system and the cleaning fluid delivery system deliver compressed air and cleaning fluid into the purging unit, the compressed air and cleaning fluid will be sprayed from the several nozzles at an oblique angle onto the surface of the transparent window to effectively and quickly remove the dust on the transparent window. Finally, when the external compressed air delivery system delivers compressed air into the purging unit, it can use pulse purging and make the compressed air carry positive and negative ions. On the one hand, this avoids secondary dust generation caused by continuous airflow, and on the other hand, it effectively eliminates ultrafine particles adsorbed on the transparent window.

[0007] Furthermore, the horizontal moving module includes a connecting block, a connecting rod, and a fixing frame. A sealing block is installed inside the fixing frame, and the sealing block is connected to the connecting block via the connecting rod. The connecting block is connected to the outer wall of the fixing mechanism. A compression spring is wound around one end of the connecting rod located inside the fixing frame. The connecting assembly includes a regulating valve. The inlet end of the regulating valve is connected to a threaded interface, and the two outlet ends of the regulating valve are connected to the air chamber and the fixing frame, respectively. When the purging unit cleans the transparent window, the outlet end of the regulating valve connected to the air chamber is in the open state (the outlet end of the regulating valve connected to the fixing frame is in the closed state). An external compressed air delivery system and a cleaning fluid delivery system deliver compressed air and cleaning fluid to the purging unit through the threaded interface and the regulating valve. When the cleaning process is complete and the transparent window needs to be moved closer to the lens so that the wiping unit can operate, the control system can open the outlet end of the regulating valve connected to the fixed frame and close the outlet end of the regulating valve connected to the fixed frame at the same time. Compressed air is then delivered into the fixed frame through the external compressed air delivery system, which drives the sealing block to move closer to the lens. Since the sealing block is connected to the outer wall of the fixed mechanism through the connecting rod and connecting block, the fixed mechanism and the transparent window will move synchronously towards the lens until the transparent window moves to the cleaning station where the wiping unit is located. Through the above technical solution, the present invention can control the position of the transparent window relative to the wiping unit without the need for an additional complex electronically controlled linear drive system. The external compressed air delivery system is both the cleaning power source and the movement power source of the transparent window.

[0008] Furthermore, the wiping unit includes a scraper, a motor, and two cleaning chambers. These two chambers are positioned opposite each other on the inner wall of the outer casing. Each cleaning chamber contains a scraper, which is connected to the motor via a rotating shaft. The fixing mechanism includes a rotary drive assembly, which is connected to the transparent window. When the wiping unit is not in a cleaning operation state, the two scrapers are located in their respective cleaning chambers (the two scrapers are parallel to the axis of the outer casing), thus preventing the scrapers from obstructing the axial movement of the transparent window within the casing. When the transparent window moves to the cleaning position where the wiping unit is located, requiring the wiping unit to clean the transparent window, the two motors will drive the two scrapers to close together until both scrapers... The scrapers contact and cover the wall surface of the transparent window exposed to the external environment (at this time, the two scrapers are perpendicular to the axis of the housing). Then, the transparent window is driven to rotate along its own axis by the rotation drive assembly. During the rotation of the transparent window, the two scrapers continue to contact the rotating transparent window, scraping away the stains and cleaning liquid on the wall surface of the transparent window. Compared with the prior art, the wiping unit in this invention is completely retracted and hidden in the housing when not in operation. At the same time, the wiping unit does not block the transparent window. On the one hand, it avoids the scrapers being exposed to dust, acid rain and high-speed airflow in the tunnel for a long time. On the other hand, it maximizes the light transmission area of ​​the transparent window and prevents blind spots in monitoring caused by the setting of the wiping unit.

[0009] Furthermore, the scraper has a double-lip structure at the end near the axis of the outer casing. The front lip is used to remove oil stains from the surface of the transparent window, while the rear lip is responsible for smoothing out any remaining water film to ensure cleaning effectiveness. Finally, the end of the scraper near the axis of the outer casing is made of self-lubricating silicone material, which effectively reduces the frictional resistance between the scraper and the transparent window and prevents damage to the transparent window during the wiping and cleaning process.

[0010] Furthermore, the fixing mechanism also includes a first fixing ring and a second fixing ring. The second fixing ring is disposed on the inner wall surface of the first fixing ring. The rotation drive assembly includes a first gear, a second gear, and a second motor. In this invention, the first fixing ring, the second fixing ring, and the transparent window are concentrically arranged. The transparent window is embedded inside the second fixing ring. The second motor is fixed to the first fixing ring, and the second gear is fixed to the outside of the second fixing ring. The second motor is connected to the second fixing ring through the first and second gears. When the wiping unit wipes and cleans the transparent window (i.e., the two scrapers contact and cover the wall surface of the transparent window to be cleaned), the control system activates the second motor. Motor 2 drives gear 1 to rotate, which in turn drives gear 2 and fixed ring 2 to rotate as a whole. This causes the transparent window to rotate along its own axis. During the rotation of the transparent window, the two scrapers continuously contact the rotating transparent window and wipe the surface of the transparent window to be cleaned. Through the above technical solution, the present invention can achieve comprehensive wiping of the transparent window. At the same time, during the wiping and cleaning process of the transparent window, there is no need for the scrapers to perform complex back-and-forth movement, which completely eliminates the problem of cleaning dead corners that traditional cleaning components are prone to leave at the edges of the transparent window, and effectively improves the image quality of tunnel monitoring.

[0011] Furthermore, a drain port is provided at the bottom of the inner part of the outer casing. The drain port is located on the side of the transparent window near several nozzles. A liquid storage box is provided below the drain port. When the cleaning fluid delivery system delivers cleaning fluid to the purging unit to clean the transparent window, the waste liquid will fall naturally to the drain port under the action of gravity, and then fall into the liquid storage box for temporary storage. Finally, the liquid storage box is made of transparent material so that the operator can observe the internal liquid level and clean the liquid storage box in a timely manner.

[0012] Furthermore, the storage box is provided with a first chamber and a second chamber. The first chamber is connected to a first drain outlet, and the bottom of the first chamber near the second chamber is provided with a second drain outlet, which is connected to an external wastewater collection system. When the cleaning liquid (waste liquid) blown by the cleaning liquid delivery system toward the transparent window falls into the storage box, the waste liquid will be collected by the external wastewater collection system along the second drain outlet. In order to avoid the accumulation of particles and other impurities carried in the waste liquid in the storage box, which would affect the subsequent discharge of waste liquid, the present invention provides a cleaning plate in the first chamber and a linear drive module in the second chamber. The working end of the linear drive module is connected to the cleaning plate, which is scraper-shaped. Every once in a while, the control system can activate the linear drive module to drive the cleaning plate to move in the first chamber, thereby scraping and pushing the particles and other impurities accumulated at the bottom of the storage box into the second drain outlet, thus avoiding excessive accumulation of particles and other impurities at the bottom of the storage box, which would affect the subsequent discharge of waste liquid.

[0013] Furthermore, the linear drive module includes a movable plate and a second regulating valve. The movable plate is connected to the cleaning plate via a fixed rod. The inlet end of the second regulating valve is connected to an external air pump, and the two outlet ends of the second regulating valve are respectively connected to the two ends inside the second chamber. When the cleaning plate needs to move towards the drain outlet, the second regulating valve supplies compressed air from the external air pump to the end of the second chamber near the first chamber. Under the pressure of the air, the movable plate moves the cleaning plate towards the drain outlet. When the cleaning plate needs to move away from the drain outlet, the second regulating valve supplies compressed air from the external air pump to the end of the second chamber away from the first chamber. Under the action of the movable plate, the cleaning plate moves away from the second sewage outlet. The present invention uses compressed air provided by an external air pump as a power source. Through the regulating valve and the movable plate, the cleaning plate is driven to make reciprocating linear motion in the first chamber, thereby automatically completing the scraping and discharge of waste liquid. The whole process does not require manual intervention, truly realizing fully automatic maintenance-free drainage of the camera, greatly reducing the labor intensity of manual cleaning by tunnel maintenance personnel. Finally, in actual engineering applications, since a complete compressed air pipeline network is generally laid inside the tunnel, the power source for the waste discharge of the liquid storage box can be directly integrated into the existing compressed air delivery system without the need to add an additional independent air pump or air pressure generating device.

[0014] Furthermore, the anti-condensation unit includes a transparent heating film and a temperature control element. The transparent heating film is attached to the wall of the transparent window and is electrically connected to the temperature control element. The temperature control element detects the surface temperature of the transparent window. When the surface temperature of the transparent window is lower than the set dew point threshold, the transparent heating film heats up to raise the surface temperature of the transparent window to a safe range above the dew point threshold, preventing fog, dew, etc. from condensing on the transparent window and thus affecting the imaging effect of the lens.

[0015] Compared with existing technologies, the advantages of this invention are as follows: Unlike current tunnel cameras which use both blowing and wiping units, this invention employs a multi-stage cleaning method—blowing followed by wiping—to progressively remove complex pollutants such as ordinary dust, oily soot, and de-icing salt spray from the transparent viewing window. Compared to a single cleaning method, this invention significantly improves cleaning efficiency. Furthermore, the blowing unit uses an oblique slit spray pattern combined with pulsed ionized airflow, effectively removing dust while avoiding secondary dust generation and ultrafine particle adsorption. The wiping unit, when not in operation, is completely housed within the cleaning chamber and parallel to the outer shell axis. This avoids long-term exposure of the wiping unit to dust, acid rain, and high-speed airflow within the tunnel, while also ensuring that the wiping unit does not obstruct the transparent viewing window, eliminating blind spots. Moreover, the wiping unit and fixing mechanism in this invention work together to achieve... The transparent window is thoroughly wiped, and during the wiping and cleaning process, there is no need for the complex back-and-forth movement of the scraper. This completely eliminates the problem of cleaning dead corners that traditional cleaning components easily leave at the edges of the transparent window, effectively improving the image quality of tunnel monitoring. Finally, the invention also includes a horizontal movement module and a linear drive module, both of which are pneumatically driven. That is, the compressed air output from the external compressed air delivery system serves as both the cleaning power source and the horizontal movement power source for the transparent window and the cleaning plate. By switching the airflow path through regulating valve one, the reciprocating movement of the transparent window between the blowing station and the wiping station can be controlled. By switching the airflow path through regulating valve two, the cleaning plate can be driven to reciprocate within the liquid storage box at regular intervals, preventing excessive accumulation of particles and other impurities at the bottom of the liquid storage box, which would affect the subsequent discharge of waste liquid. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 3 This is a schematic diagram of the horizontal movement module structure of the present invention; Figure 4 This is a schematic diagram of the wiping unit structure of the present invention; Figure 5 This is a schematic diagram showing the connection between the regulating valve and the air chamber of the present invention; Figure 6 This is a schematic diagram of the fixing mechanism structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the liquid storage box of the present invention; Figure 8 This is a schematic diagram showing the location of the second sewage outlet of the present invention.

[0017] In the diagram: 1. Outer shell; 11. Connecting block; 12. Connecting rod; 13. Fixing frame; 131. Sealing block; 14. Air chamber; 141. Nozzle; 15. Drain outlet one; 16. Scraper; 161. Rotating shaft; 2. Mounting plate; 21. Lens; 3. Mounting base; 31. Threaded interface; 32. Regulating valve one; 4. Transparent window; 5. Fixing mechanism; 51. Fixing ring one; 52. Gear one; 53. Gear two; 54. Fixing ring two; 6. Liquid storage box; 61. Chamber one; 611. Cleaning plate; 612. Drain outlet two; 62. Chamber two; 621. Movable plate; 63. Fixing rod; 64. Regulating valve two. Detailed Implementation

[0018] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: Figures 1-8 As shown, the present invention provides a technical solution: a tunnel self-cleaning camera capable of automatic dust removal, comprising a housing 1, with a lens 21 for imaging installed inside the housing 1. The lens 21 is detachably connected to the housing 1 via a flange-type mounting plate 2. A transparent window 4 is provided at the end of the housing 1 away from the mounting plate 2, and the transparent window 4 is connected to the housing 1 via a fixing mechanism 5. A horizontal moving module is provided on the inner wall of the housing 1, and the working end of the horizontal moving module is connected to the outer wall surface of the fixing mechanism 5. The horizontal moving module controls the movement of the fixing mechanism 5 and the transparent window 4 along the axis of the housing 1. A purging unit is provided on the side of the window 4 away from the lens 21, and a wiping unit is provided on the side of the transparent window 4 near the lens 21. An anti-condensation unit is provided on the wall surface of the transparent window 4 near the lens 21 to prevent fog from condensing on the transparent window 4 and affecting the imaging effect of the lens 21. A mounting base 3 is provided on the outer wall surface of the housing 1. A threaded interface 31 is provided on the mounting base 3. A connecting component is provided inside the mounting base 3. One end of the threaded interface 31 is connected to the purging unit through the connecting component, and the other end of the threaded interface 31 is connected to the external compressed air delivery system and the cleaning fluid delivery system.

[0020] In this invention, the triggering actions of the blowing unit and the wiping unit are controlled by a built-in or external control system. The operating logic for triggering the cleaning operation can be selected by time triggering or contamination detection triggering as needed (the above triggering mechanism is a conventional technique in this field and will not be described in detail again). When the cleaning operation on the transparent window 4 is not triggered, the transparent window 4 is moved away from the lens 21 (e.g., ...). Figure 2As shown in the diagram, at this time, the side of the transparent window 4 away from the lens 21 is exposed to the external environment and close to the blowing unit. When it is necessary to clean the transparent window 4, the external compressed air delivery system first delivers compressed air to the blowing unit to blow away the ordinary dust on the transparent window 4. Then, the cleaning fluid delivery system delivers cleaning fluid to the blowing unit to remove the oily soot (diesel exhaust, asphalt volatiles) or de-icing salt spray on the transparent window 4. After the initial cleaning of the transparent window 4 is completed, the horizontal moving module drives the fixing mechanism 5 and the transparent window 4 to move towards the lens 21 until the wiping unit can contact and cover the wall surface of the transparent window 4 exposed to the external environment. The wiping unit removes stubborn stains on the transparent window 4 and removes the residual cleaning fluid on the transparent window 4. When the cleaning of the transparent window 4 is completely completed, the horizontal moving module drives the fixing mechanism 5 and the transparent window 4 to return to the initial position to facilitate subsequent imaging by the lens 21.

[0021] like Figures 2-4 As shown, the purging unit includes an air chamber 14. Several nozzles 141 are arranged on the side of the air chamber 14 near the transparent window 4. The spray direction of the nozzles 141 is at an angle of 15° to 30° to the surface of the transparent window 4. When the external compressed air delivery system and the cleaning fluid delivery system deliver compressed air and cleaning fluid into the purging unit, the compressed air and cleaning fluid will be sprayed from the several nozzles 141 at an oblique sectional shape onto the surface of the transparent window 4, so as to effectively and quickly remove the dust on the transparent window 4. Finally, when the external compressed air delivery system delivers compressed air into the purging unit, it can use pulse purging and make the compressed air carry positive and negative ions. On the one hand, it avoids the continuous airflow from raising secondary dust, and on the other hand, it effectively eliminates the ultrafine particles adsorbed on the transparent window 4.

[0022] like Figures 2-3As shown, the horizontal moving module includes a connecting block 11, a connecting rod 12, and a fixing frame 13. A sealing block 131 is installed inside the fixing frame 13. The sealing block 131 is connected to the connecting block 11 via the connecting rod 12. The connecting block 11 is connected to the outer wall of the fixing mechanism 5. A compression spring is wound around one end of the connecting rod 12 located inside the fixing frame 13. The connecting assembly includes a regulating valve 32. The inlet end of the regulating valve 32 is connected to a threaded interface 31. The two outlet ends of the regulating valve 32 are respectively connected to the air chamber 14 and the fixing frame 13. When the purging unit cleans the transparent window 4, the outlet end of the regulating valve 32 connected to the air chamber 14 is in the open state (the outlet end of the regulating valve 32 connected to the fixing frame 13 is in the closed state). An external compressed air delivery system and a cleaning fluid delivery system deliver compressed air and cleaning fluid to the purging unit through the threaded interface 31 and the regulating valve 32. When the cleaning unit is working, the transparent window 4 needs to be driven closer to the lens 21. The control system can open the outlet end of the regulating valve 32 connected to the fixed frame 13 and close the outlet end of the regulating valve 32 connected to the fixed frame 13 at the same time. Compressed air is delivered into the fixed frame 13 through the external compressed air delivery system, which drives the sealing block 131 to move closer to the lens 21. Since the sealing block 131 is connected to the outer wall of the fixing mechanism 5 through the connecting rod 12 and the connecting block 11, the fixing mechanism 5 and the transparent window 4 will move synchronously towards the lens 21 until the transparent window 4 moves to the cleaning station where the cleaning unit is located. Through the above technical solution, the present invention can control the position of the transparent window 4 relative to the cleaning unit without the need for an additional complex electronic linear drive system. The external compressed air delivery system is both the cleaning power source and the movement power source of the transparent window 4.

[0023] like Figure 2 and Figures 4-6As shown, the wiping unit includes a scraper 16, a motor, and two cleaning chambers. The two cleaning chambers are positioned opposite each other on the inner wall of the outer casing 1. Each cleaning chamber contains a scraper 16, which is connected to the motor via a rotating shaft 161. The fixing mechanism 5 includes a rotary drive assembly, which is connected to the transparent window 4. When the wiping unit is not in a cleaning operation state, the two scrapers 16 are located in the two cleaning chambers respectively (the two scrapers 16 are parallel to the axis of the outer casing 1), thus preventing the scrapers 16 from obstructing the axial movement of the transparent window 4 within the outer casing 1. When the transparent window 4 moves to the cleaning position where the wiping unit is located, and the wiping unit needs to wipe and clean the transparent window 4, the two motors will drive the two scrapers 16 to close together until the two scrapers 16... The wiping unit 6 contacts and covers the wall surface of the transparent window 4 exposed to the external environment (at this time, the two scrapers 16 are perpendicular to the axis of the housing 1). Then, the transparent window 4 is driven to rotate along its own axis by the rotation drive assembly. During the rotation of the transparent window 4, the two scrapers 16 continue to contact the rotating transparent window 4, and the two scrapers 16 scrape away the stains and cleaning liquid on the wall surface of the transparent window 4. Compared with the prior art, the wiping unit in this invention is completely retracted and hidden in the housing 1 when not in operation. At the same time, the wiping unit does not block the transparent window 4. On the one hand, it avoids the scrapers 16 being exposed to dust, acid rain and high-speed airflow in the tunnel for a long time. On the other hand, it maximizes the light transmission area of ​​the transparent window 4 and prevents blind spots in monitoring caused by the setting of the wiping unit.

[0024] like Figures 4-5 As shown, the end of the scraper 16 near the axis of the outer casing 1 has a double-lip structure. The front lip is used to remove oil stains from the surface of the transparent window 4, while the rear lip is responsible for smoothing out any remaining water film to ensure cleaning effectiveness. Finally, the end of the scraper 16 near the axis of the outer casing 1 is made of self-lubricating silicone material, which effectively reduces the frictional resistance between the scraper 16 and the transparent window 4, preventing damage to the transparent window 4 during the wiping and cleaning process.

[0025] like Figure 2 and Figure 6As shown, the fixing mechanism 5 also includes a first fixing ring 51 and a second fixing ring 54. The second fixing ring 54 is disposed on the inner wall surface of the first fixing ring 51. The rotation drive assembly includes a first gear 52, a second gear 53, and a second motor. In this invention, the first fixing ring 51, the second fixing ring 54, and the transparent window 4 are concentrically arranged. The transparent window 4 is embedded inside the second fixing ring 54. The second motor is fixed on the first fixing ring 51, and the second gear 53 is fixed on the outside of the second fixing ring 54. The second motor is connected to the second fixing ring 54 through the first gear 52 and the second gear 53. When the wiping unit wipes and cleans the transparent window 4 (i.e., the two scrapers 16 contact and cover the wall surface of the transparent window 4 to be cleaned), the control system activates. The second motor is started, which drives the first gear 52 to rotate, thereby driving the second gear 53 and the second fixing ring 54 to rotate as a whole. This causes the transparent window 4 to rotate along its own axis. During the rotation of the transparent window 4, the two scrapers 16 continuously contact the rotating transparent window 4 and wipe the wall surface of the transparent window 4 to be cleaned. Through the above technical solution, the present invention can achieve a comprehensive cleaning of the transparent window 4. At the same time, during the cleaning process of the transparent window 4, there is no need for the scrapers 16 to perform complex back-and-forth movement, which completely eliminates the problem of cleaning dead corners that traditional cleaning components easily leave at the edges of the transparent window 4, and effectively improves the image quality of tunnel monitoring.

[0026] like Figure 2 and Figures 4-5 As shown, a drain port 15 is provided at the bottom of the inner side of the outer casing 1. The drain port 15 is located on the side of the transparent window 4 near several nozzles 141. A liquid storage box 6 is provided below the drain port 15. When the cleaning fluid delivery system delivers cleaning fluid to the purging unit to clean the transparent window 4, the waste liquid will fall naturally to the drain port 15 under the action of gravity, and then fall into the liquid storage box 6 to temporarily store the waste liquid. Finally, the liquid storage box 6 is made of transparent material so that the operator can observe the internal liquid level and clean the liquid storage box 6 in a timely manner.

[0027] like Figures 7-8As shown, the storage box 6 is equipped with a first chamber 61 and a second chamber 62. The first chamber 61 is connected to the drain outlet 15. The bottom of the end of the first chamber 61 near the second chamber 62 is provided with a second drain outlet 612, which is connected to an external wastewater collection system. When the cleaning fluid (waste liquid) blown by the cleaning fluid delivery system toward the transparent window 4 falls into the storage box 6, the waste liquid will be collected by the external wastewater collection system along the drain outlet 612. This is to prevent particles and other impurities carried in the waste liquid from accumulating in the storage box 6, which would affect the subsequent discharge of the waste liquid. In this invention, a cleaning plate 611 is provided in chamber one 61, and a linear drive module is provided in chamber two 62. The working end of the linear drive module is connected to the cleaning plate 611. The cleaning plate 611 is scraper-shaped. Every once in a while, the control system can activate the linear drive module to drive the cleaning plate 611 to move in chamber one 61, thereby scraping and pushing the particles and other impurities accumulated at the bottom of the liquid storage box 6 into the drain outlet two 612, so as to avoid excessive accumulation of particles and other impurities at the bottom of the liquid storage box 6, which would affect the subsequent discharge of waste liquid.

[0028] like Figures 7-8 As shown, the linear drive module includes a movable plate 621 and a regulating valve 64. The movable plate 621 is connected to the cleaning plate 611 via a fixed rod 63. The inlet end of the regulating valve 64 is connected to an external air pump, and the two outlet ends of the regulating valve 64 are respectively connected to the two ends of the interior of the second chamber 62. When the cleaning plate 611 needs to move towards the drain outlet 612, the regulating valve 64 delivers compressed air input from the external air pump to the end of the second chamber 62 near the first chamber 61. Under the action of air pressure, the movable plate 621 carries the cleaning plate 611 towards the drain outlet 612. When the cleaning plate 611 needs to move away from the drain outlet 612, the regulating valve 64 delivers compressed air input from the external air pump to the end of the second chamber 62 away from the drain outlet 612. At one end of chamber 61, under the action of air pressure, the movable plate 621 carries the cleaning plate 611 away from the drain outlet 612. This invention uses compressed air provided by an external air pump as a power source. Through the regulating valve 64 and the movable plate 621, the cleaning plate 611 is driven to make reciprocating linear motion in chamber 61, thereby automatically completing the scraping and discharge of waste liquid. The whole process does not require manual intervention, truly realizing fully automatic maintenance-free drainage of the camera, greatly reducing the labor intensity of manual cleaning by tunnel maintenance personnel. Finally, in actual engineering applications, since a complete compressed air pipeline network is generally laid inside the tunnel, the waste discharge power source of the liquid storage box 6 can be directly integrated into the existing compressed air delivery system without the need to add an independent air pump or air pressure generating device.

[0029] like Figure 2As shown, the anti-condensation unit includes a transparent heating film and a temperature control element. The transparent heating film is attached to the wall of the transparent window 4 and is electrically connected to the temperature control element. The temperature control element detects the surface temperature of the transparent window 4. When the surface temperature of the transparent window 4 is lower than the set dew point threshold, the transparent heating film heats up to raise the surface temperature of the transparent window 4 to a safe range above the dew point threshold, preventing fog and dew from condensing on the transparent window 4 and thus affecting the imaging effect of the lens 21.

[0030] The working principle of this invention is as follows: When the cleaning operation of the transparent window 4 is not triggered, the side of the transparent window 4 away from the lens 21 is exposed to the external environment and close to the blowing unit. When the control system issues a cleaning operation command for the transparent window 4, the external compressed air delivery system first delivers compressed air to the blowing unit to blow away ordinary dust adhering to the transparent window 4. Then, the cleaning fluid delivery system delivers cleaning fluid to the blowing unit to remove oily soot (diesel exhaust, asphalt volatiles) or de-icing salt spray adhering to the transparent window 4. The cleaning waste liquid falls into the storage box 6 through the drain port 15. After the initial cleaning of the window 4 is completed, the external compressed air delivery system delivers compressed air into the horizontal moving module. The horizontal moving module drives the fixing mechanism 5 and the transparent window 4 to move closer to the lens 21 until the wiping unit can contact and cover the wall surface of the transparent window 4 exposed to the external environment. The wiping unit removes stubborn stains on the transparent window 4 and removes residual cleaning fluid. When the cleaning of the transparent window 4 is completely finished, the horizontal moving module drives the fixing mechanism 5 and the transparent window 4 to return to their initial positions to facilitate subsequent imaging by the lens 21.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tunnel self-cleaning camera capable of automatic dust removal, comprising a housing (1), a lens (21) disposed inside the housing (1), the lens (21) being connected to the housing (1) via a mounting plate (2), characterized in that: A transparent window (4) is provided at the end of the outer shell (1) away from the mounting plate (2). The transparent window (4) is connected to the outer shell (1) through a fixing mechanism (5). A horizontal moving module is provided on the inner wall of the outer shell (1). The working end of the horizontal moving module is connected to the outer wall of the fixing mechanism (5). A blowing unit is provided on the side of the transparent window (4) away from the lens (21). A wiping unit is provided on the side of the transparent window (4) close to the lens (21). An anti-condensation unit is provided on the wall of the transparent window (4) close to the lens (21). A mounting base (3) is provided on the outer wall of the outer shell (1). A threaded interface (31) is provided on the mounting base (3). A connecting component is provided inside the mounting base (3). One end of the threaded interface (31) is connected to the blowing unit through the connecting component. The other end of the threaded interface (31) is connected to the external compressed air delivery system and the cleaning fluid delivery system.

2. The tunnel self-cleaning camera with automatic dust removal capability according to claim 1, characterized in that: The purging unit includes an air chamber (14), and a plurality of nozzles (141) are provided on the side of the air chamber (14) near the transparent window (4). The spraying direction of the nozzles (141) is at an angle of 15° to 30° to the surface of the transparent window (4).

3. A tunnel self-cleaning camera capable of automatic dust removal according to claim 2, characterized in that: The horizontal moving module includes a connecting block (11), a connecting rod (12), and a fixing frame (13). A sealing block (131) is provided inside the fixing frame (13). The sealing block (131) is connected to the connecting block (11) through the connecting rod (12). The connecting block (11) is connected to the outer wall of the fixing mechanism (5). A compression spring is wound around one end of the connecting rod (12) inside the fixing frame (13). The connecting assembly includes a regulating valve (32). The inlet end of the regulating valve (32) is connected to the threaded interface (31). The two outlet ends of the regulating valve (32) are connected to the air chamber (14) and the fixing frame (13) respectively.

4. The tunnel self-cleaning camera with automatic dust removal capability according to claim 1, characterized in that: The wiping unit includes a scraper (16), a motor and a cleaning chamber. There are two cleaning chambers, which are arranged opposite each other on the inner wall of the outer shell (1). Each cleaning chamber is equipped with a scraper (16). The scraper (16) is connected to the motor via a rotating shaft (161). The fixing mechanism (5) includes a rotation drive assembly, which is connected to the transparent window (4) in a transmission manner.

5. A tunnel self-cleaning camera capable of automatic dust removal according to claim 4, characterized in that: The scraper (16) has a double-lip structure at one end near the axis of the outer shell (1), and the scraper (16) is made of self-lubricating silicone material at the other end near the axis of the outer shell (1).

6. A tunnel self-cleaning camera capable of automatic dust removal according to claim 4, characterized in that: The fixing mechanism (5) further includes a fixing ring one (51) and a fixing ring two (54). The fixing ring two (54) is disposed on the inner wall surface of the fixing ring one (51). The transparent window (4) is disposed on the inner wall surface of the fixing ring two (54). The rotation drive assembly includes a gear one (52), a gear two (53) and a motor two. The motor two is connected to the fixing ring two (54) through the gear one (52) and the gear two (53).

7. A tunnel self-cleaning camera capable of automatic dust removal according to any one of claims 1-6, characterized in that: The bottom of the inner shell (1) is provided with a drain port (15), which is located on the side of the transparent window (4) near several nozzles (141). A liquid storage box (6) is provided below the drain port (15).

8. A tunnel self-cleaning camera capable of automatic dust removal according to claim 7, characterized in that: The liquid storage box (6) is provided with a first chamber (61) and a second chamber (62). The first chamber (61) is connected to a first drain outlet (15). A cleaning plate (611) is provided in the first chamber (61). A linear drive module is provided in the second chamber (62). The working end of the linear drive module is connected to the cleaning plate (611). A second drain outlet (612) is provided at the bottom of the first chamber (61) near the second chamber (62). The second drain outlet (612) is connected to an external sewage collection system.

9. A tunnel self-cleaning camera capable of automatic dust removal according to claim 8, characterized in that: The linear drive module includes a movable plate (621) and a regulating valve (64). The movable plate (621) is connected to the cleaning plate (611) via a fixed rod (63). The inlet end of the regulating valve (64) is connected to an external air pump, and the two outlet ends of the regulating valve (64) are respectively connected to the two ends inside the chamber (62).

10. A tunnel self-cleaning camera capable of automatic dust removal according to claim 1, characterized in that: The anti-condensation unit includes a transparent heating film and a temperature control element. The transparent heating film is attached to the wall of the transparent window (4), and the transparent heating film is electrically connected to the temperature control element.

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