38results about "Light-buoys" patented technology

The invention relates to the technical field of beacon lights, in particular to a beacon light capable of being installed through an unmanned aerial vehicle and the unmanned aerial vehicle. The beacon light comprises a beacon light body, a power module is fixed in the beacon light body, and a mounting groove is formed in the lower end of the beacon light body; a mounting groove is formed in the lower end of the beacon light body, a plurality of electromagnetic bolts which are distributed along the mounting groove in an annular array mode are arranged in the lower end of the beacon light body, a conical top base is fixed to the upper end of the beacon light body, and a magnetic switch is fixed in the conical top base and connected to a circuit between the power module and the electromagnetic bolts in series. The beneficial effects are that the unmanned aerial vehicle is utilized to realize automatic replacement of the beacon light device, an operator can perform remote operation without arriving at a site, the efficiency is high, manpower and material resources are saved, the operation safety is high, and the unmanned aerial vehicle has very high use value and popularization significance.

The invention belongs to the technical field of navigation marks, and particularly relates to a navigation mark floating ball for port channel guidance, which comprises a floating ball main body, a shell is fixedly connected to the upper end of the floating ball main body, a controller is arranged on one side of the front end surface of the shell, and a navigation mark lamp is arranged at the bottom of an inner cavity of a lampshade. A gravity sensing type foreign matter removing mechanism for preventing foreign matters from covering the surface of the lampshade is arranged on the shell; by means of the gravity sensing type foreign matter removing mechanism, when foreign matter covers the surface of a lampshade, the lampshade retracts into a shell, the surface of the lampshade scrapes an inner ring of a collecting frame, the foreign matter attached to the surface of the lampshade is scraped into a collecting groove, and after the upper end face of the lampshade is flush with the upper end face of the collecting frame, a scraper is driven to move transversely, so that the foreign matter is removed. Foreign matter attached to the upper surface of the lampshade is scraped into the collecting groove, the situation that due to the fact that the lampshade is covered with the foreign matter, the light emitting effect of the beacon light is affected, and the visibility and the identification degree of a beacon are reduced is avoided, and potential safety hazards in the navigation process are reduced.

The utility model provides a multifunctional port navigation mark, which relates to the technical field of navigation and comprises an anchoring system, a floating body, a mark body, a lighting system, a control system and a power supply system. The floating body comprises a cylindrical buoy, the interior of the buoy is of a cavity structure, and a ballast is placed at the bottom of the cavity of the buoy; the four sets of double-color LED lamp panels are arranged, the included angle between every two of the four sets of double-color LED lamp panels is 90 degrees, the four sets of double-color LED lamp panels face four different horizontal directions respectively, and therefore it is guaranteed that passing ships in all the directions can clearly see the four sets of double-color LED lamp panels. The double-color LED lamp panel has a function of emitting red or green light, and can realize a normally-on or burst flashing state according to a received instruction; the flashing frequency can be flexibly changed according to the received instruction, and clear information can be transmitted to passing ships by adjusting the color and frequency of the light; the problems that an indication signal of an existing navigation mark is single, and maritime information cannot be conveniently and accurately obtained by a sailoman are solved.

The invention discloses an overwater automatic light-emitting position-indicating buoy device which comprises a buoy main body used for providing buoyancy to enable the whole device to float on the sea surface, a power supply control assembly arranged in the buoy main body and light source assemblies arranged in the buoy main body and distributed along the periphery, and the buoy main body comprises main body floating wood and an acrylic light-transmitting plate. The acrylic light-transmitting plates are arranged on the top face, the front side face, the rear side face, the left side face and the right side face of the body floating wood, the acrylic light-transmitting plates and the body floating wood are locked through locking screws, and therefore an internal sealing environment is formed. According to the overwater automatic light-emitting position-indicating buoy device, the buoy body and the light source assembly serve as main bodies, a signal source is provided through light, the overwater automatic light-emitting position-indicating buoy device and a vehicle are bound together, a searcher can find the vehicle in distress through light indication, and the searching efficiency is greatly improved.

The utility model discloses a lifesaving position indicating lamp with high environmental adaptability and a lifesaving system, and relates to the field of lighting equipment. The lifesaving position indicating lamp with the high environmental adaptability comprises a position indicating lamp body, a seawater battery assembly and a wire connecting the position indicating lamp body and the seawater battery assembly, the seawater battery assembly comprises a battery shell with the two ends provided with a positive electrode and a negative electrode respectively, and the two ends of the battery shell are connected with a positive electrode protection cap and a negative electrode protection cap which are arranged on the positive electrode and the negative electrode in a sleeving mode respectively. At least one excitation mechanism is arranged in the battery shell; the excitation mechanism is used for generating gas when the excitation mechanism is thrown into seawater and collided, so that the positive electrode protective cap and the negative electrode protective cap are separated from the battery shell, and seawater enters the battery shell to activate the seawater battery assembly to lighten the position indicating lamp body. The lifesaving position indicating lamp with strong environmental adaptability and the lifesaving system can prevent external steam from entering the battery shell to excite the seawater battery assembly in a long-time storage process, and ensure normal use after long-time storage in different storage environments.

The utility model belongs to the technical field of navigation marks, and particularly relates to a guide type navigation mark lamp base convenient to align and install, which comprises a base fixing support, a guide disc, a locking matching block and a base heightening support. The guide disc and the locking matching block are connected and are arranged in the base fixing bracket; the upper portion of the guide disc is connected with the top face of the base fixing support, and the lower portion of the locking matching block is connected with the bottom face of the base fixing support. The base heightening support is arranged at the bottom of the base fixing support. According to the utility model, the guide disc and the locking matching block which play a guiding role are arranged, so that the height matching of the base and the beacon light is realized, and the installation process of the beacon light is safer and more convenient; and by forming the drainage hole in the locking matching block, the purpose of preventing water accumulation is achieved, and therefore the service life is prolonged.

The utility model discloses a navigation mark wave power generation power supply system, which relates to the navigation mark wave power generation field and comprises a top plate, the bottom end edge of the top plate is fixedly connected with a connecting plate, the outer side surface of the connecting plate is fixedly connected with a shock absorber, the other end of the shock absorber is fixedly connected with a protective shell, and the inner side surface of the protective shell is fixedly connected with a rotating frame. Rotating pieces are rotatably connected to the upper ends of the rotating frames, telescopic rods are fixedly connected between the adjacent rotating pieces located on the different protective shells, liquid passing openings are formed in the connecting plates and the protective shells, annular floating bags are fixedly connected to the inner side surfaces of the bottom ends of the connecting plates, and fixing rods are fixedly connected to the inner side surfaces of the bottom ends of the connecting plates; a bottom plate is fixedly connected to the bottom end of the fixing rod, a fixing column is fixedly connected to the middle of the bottom end of the bottom plate, a positioning cone is fixedly connected to the bottom end of the fixing column, and a positioning ring is fixedly connected to the edge of the bottom end of the bottom plate.

The utility model relates to the technical field of beacon lights, in particular to a multifunctional beacon light which comprises a floating body and the like, the floating body serves as a main body bearing structure of a light buoy and is used for providing buoyancy and stabilizing the position of the whole beacon light on the water surface, the upper end of the floating body is fixedly connected with a tower bottom, and the tower bottom serves as a transition part for connecting the floating body and an upper structure. The cover plate serves as a platform foundation for personnel operation and staying, the tower body is fixedly connected to the center of the upper end of the cover plate, the tower body serves as a vertical supporting structure, a ladder stand is installed on the periphery of the tower body, the upper end of the tower body is fixedly connected with a top disc, a large lampshade is fixedly arranged on the top disc, a guide rail is arranged close to the large lampshade, and a small lampshade is slidably connected to the guide rail. By arranging the lampshade capable of being opened in a rotating mode, a maintainer can easily reach the position of the beacon light and operate the beacon light, and the maintenance and replacement process of the beacon light is greatly simplified.

[Problem] To provide a channel marker identification device that can increase the identification accuracy for marker contents. [Solution] A channel marker identification device provided with: a first acquisition unit for acquiring a first image that includes a buoy from a camera installed in a ship; a first identification unit for identifying the position of the buoy in the first image; a second acquisition unit for acquiring a second image having a higher resolution than that of the first image and corresponding to a partial area of the first image which includes the position of the buoy; and a second identification unit for identifying marker contents of the buoy from the second image.

[Problem] To provide a sea mark identification device capable of distinguishing a port mark and a starboard mark regardless of the location of a ship. [Solution] A sea mark identification device comprises: an acquisition unit that acquires an image generated by a camera installed on a ship; a mode identification unit that identifies whether the mode of a lateral buoy contained in the image is a first mode or a second mode; a country determination unit that determines a country to which a location detected by a location detection unit for detecting the location of the ship belongs; and a port / starboard determination unit that, on the basis of predetermined corresponding relationships indicating whether the first mode and the second mode correspond to a port sign or a starboard sign in each country, determines whether the mark content of the lateral buoy is a port mark or a starboard mark, from the mode of the lateral buoy and the determined country.

The utility model discloses a navigation light buoy roof boarding with an anti-collision structure. The navigation light buoy roof boarding comprises a navigation light buoy, the roofing board main body is arranged above the navigation light buoy; the anti-collision assemblies are installed on the two faces of the goalboard body; the anti-collision assembly comprises a cushioning shell, a sliding column, a limiting plate, a spring, a cushion pad, a hit plate and a protection plate, one end of the cushioning shell is fixedly connected with the outer surface of the roof boarding body, the outer surface of the sliding column is slidably connected with the end, away from the roof boarding body, of the cushioning shell, and one side of the limiting plate is fixedly connected with one end of the sliding column; one end of the spring is fixedly connected with the side, away from the sliding column, of the limiting plate, the other end of the spring is fixedly connected with the buffering pad, and the buffering pad is fixedly installed in the cushioning shell. According to the scheme, the navigation light buoy, the roof boarding body and the anti-collision assembly are arranged, through the structure, the protection effect can be achieved when the roof boarding body is impacted, and the effect that the roof boarding body is prevented from being damaged due to impact is achieved.

The present disclosure provides an autonomous cruising system capable of improving an accuracy of identifying description of a sign. The autonomous cruising system includes processing circuitry. The processing circuitry acquires a first image including a buoy from a camera installed in a ship. The processing circuitry identifies a position of the buoy inside the first image. The processing circuitry acquires a second image corresponding to a partial area of the first image including the position of the buoy, and the second image is higher in resolution than the first image. The processing circuitry identifies description of a sign of the buoy based on the second image.

The present invention discloses a sector light, said sector light having at least one tier including a light source assembly comprising opaque dividing elements, two or more light sources, and two or more optical lenses; wherein the light source assembly is divided into circumferential sections, each circumferential section being separated by the opaque dividing elements, and each circumferential section containing a light source and an optical lens arranged such that the optical lens collects and outwardly projects the light emitted by the light source.

A beacon light body comprises a base, a stabilizing mechanism and a height adjusting mechanism are arranged in the base, the stabilizing mechanism comprises a gravity ball arranged in the base, the gravity ball is located in the center of the interior of the base, fixing plates are fixedly connected to the two sides of the gravity ball, and the height adjusting mechanism is arranged on the height adjusting mechanism. The tops of the two fixing plates are both provided with round holes, threads are arranged in the round holes, the interiors of the two round holes are both in threaded connection with bolts, and the gravity ball is fixedly connected with the bottom of the base through the bolts. When encountering sea waves, the beacon light can float out of the water surface while being drawn into the seabed, meanwhile, the multiple first connecting rods and the arc-shaped plates are arranged on the top, the arc-shaped plates can filter out seawater flapped into the interior when the sea waves flap the arc-shaped plates, and the situation that the height of the beacon light body is reduced due to the fact that too much seawater is accumulated in the beacon light body is prevented.

The utility model discloses a wave flow floating type beacon light, which belongs to the field of beacon lights, and is characterized in that two inclined surfaces of a floating top box are connected with a pair of connecting pipes, the outer ends of the connecting pipes are connected with two fixed frames, solar panels are arranged in the fixed frames, and a fastening assembly is arranged between the two fixed frames; power supply of the beacon light is achieved through the two solar panels. The inner end of the connecting pipe is connected with a worm and gear assembly through a connecting disc, a servo motor is installed on the worm and gear assembly, the worm and gear assembly is sleeved with a protective cover, and a fixing pipe is installed at the inner end of the protective cover. The solar power supply mechanism provides stable power through two solar panels, energy consumption is reduced, the efficiency and stability of the beacon light are improved, and stable work in the severe environment is ensured. The angle of the solar panel is adjusted through the servo motor and the worm and gear assembly, illumination absorption is automatically optimized, the solar energy utilization rate and the power generation efficiency are improved, and good illumination of the beacon light is guaranteed.

The utility model discloses an anti-collision beacon light which comprises a floating body and a solar panel arranged on the top of the floating body. The lamp body is arranged at the top of the solar panel; a protection device is arranged on the floating body, the protection device comprises a plate body, a first box body, a movable rod, a fixed block and a clamping plate, and the floating body is sleeved with an anti-collision ring; and the plate body is sleeved on the floating body. According to the anti-collision beacon light, the plate body is arranged on the floating body, the first box bodies are annularly and symmetrically arranged at the top and the bottom of the plate body through the first mounting bases and the fixing bolts, the movable rods are arranged on the first box bodies, the impact force borne by the movable rods is buffered through the elastic force of the springs, and the second box bodies are arranged at the other ends of the movable rods; the second box body and the shell are fixedly connected through the threaded cover and the inserting rod, the detachable anti-collision strip is arranged on the shell, the protection effect of the whole device is improved through cooperation of all the assemblies, and meanwhile the whole assembly is convenient to disassemble and repair.

The solar integrated intelligent beacon light comprises a lamp holder, a light-emitting assembly and a power supply assembly, a cavity is formed in the lamp holder, the light-emitting assembly comprises a light source, a lampshade, a sealing ring and a retaining ring, the light source is arranged at the top of the lamp holder, the lampshade is arranged at the top of the lamp holder in a buckled mode to cover the light source, and the sealing ring is arranged at the bottom of the lampshade. The retaining ring is detachably arranged at the top of the lamp holder so that the retaining ring can press and clamp the sealing ring, the power supply assembly comprises a circuit board, a battery and a plurality of solar panels, the circuit board is arranged in the cavity and electrically connected with the light source, the battery is arranged in the cavity and electrically connected with the circuit board, and the solar panels are arranged on the outer side wall of the lamp holder and electrically connected with the light source. And each solar panel is electrically connected with the circuit board.

The utility model relates to a multifunctional buoy lamp holder which comprises a frame structure, an inner space is defined by the frame structure, an upper opening communicated with the inner space is formed in the top of the frame structure, and a personnel entrance leading to the inner space is formed in the side wall of the frame structure. According to the LED lamp, the operation safety can be improved, when maintenance personnel need to maintain the lamp, the maintenance personnel can rapidly enter the internal space from the personnel entrance, and the maintenance personnel can rapidly enter the internal space from the personnel entrance to maintain the lamp. Maintenance personnel in the inner space can greatly reduce operation risks caused by sea condition changes, the structure provides a more stable and safer operation environment for personnel, in addition, the arrangement of the inner space is combined with a stable frame structure, shaking caused by sea waves is remarkably reduced, and the service life of the maintenance personnel is prolonged. Maintenance personnel can install, maintain or inspect the lamp in a stable state, the possibility of falling and injury is reduced, and therefore the maintenance efficiency can be improved.

The invention discloses a channel identification device for generating power by utilizing wave energy. The channel identification device comprises a base, a plurality of wave energy sources and a power generation device, the shaft body part extends in the vertical direction, the rotor part is arranged on the shaft body part, the stator part is arranged on the outer side of the rotor part in a circumferential surrounding mode, and the stator part and the rotor part are arranged in a spaced mode; the vibration rod assembly and the energy harvesting plate are arranged on the vibration rod piece, the energy harvesting plate drives the vibration rod piece to move up and down under the action of waves, the lower end of the vibration rod piece is connected with the shaft body piece, the upper end of the vibration rod piece is provided with a light-emitting floating ball, and the light-emitting floating ball is electrically connected with the power generation assembly. Therefore, on one hand, the channel marking device utilizing the wave energy to generate power is simple in structure, the efficiency of converting the wave energy into the electric energy by the device is high, on the other hand, the light emitting floating ball can emit light more continuously and stably, and therefore channel marking conducted by the light emitting floating ball can be clearer; the reliability of the channel mark can be improved.

The invention relates to the technical field of vehicle communication buoys, and particularly discloses an emergency positioning communication buoy device and method for a small underwater vehicle, the emergency positioning communication buoy device comprises the underwater vehicle and an emergency self-rescue device mounted on the underwater vehicle, a motor is mounted in the emergency self-rescue device, and an output shaft of the motor is connected with a rope pulling roller in a rope pulling box; an optical fiber thin rope is wound on the rope pulling roller, one end of the optical fiber thin rope is connected with a buoy device, two partition plates are installed in the buoy device, the two partition plates divide the buoy device into three cavities which are the cavity A, the cavity B and the cavity C in sequence from top to bottom, and a battery B is installed at the bottom of the cavity B; the buoy which moves along with the underwater vehicle and is internally provided with the GPS signal transmitter is arranged on the water surface, so that the position coordinates of the underwater vehicle can be indirectly measured, and the problems that a traditional underwater vehicle cannot obtain accurate underwater coordinates, and a base line positioning device is high in price and cannot be popularized are solved.

The utility model relates to the technical field of beacon lights, and particularly discloses a beacon light with anti-collision and energy supplement functions, which comprises a beacon light body, a base arranged at the bottom of the beacon light body, a connecting seat mounted at the top of the base, an inner frame mounted at the top of the connecting seat, and a battery pack mounted inside the inner frame. A stainless steel outer cover is installed on the top of the inner frame, a lamp holder is installed in the stainless steel outer cover, a lampshade and a VHF antenna are installed on the top of the stainless steel outer cover, solar panels are installed on the four side faces of the inner frame, and a mounting hole and a four-core aviation signal jack are formed in the connecting base. Solar panels are installed on the four side faces of the beacon light device and used for supplementing energy to the beacon light device, a four-core aviation signal jack is formed in a base of the beacon light device, the jack can be used for setting an AIS radio beacon and can also be used for supplementing electricity through a mains supply or a solar panel direct-current power source, and it is guaranteed that the beacon light device can be normally used.

The application discloses a wave flow floating navigation beacon lamp and a use method, relates to the technical field of navigation beacon lamps, and aims at the problem that a wave flow floating navigation beacon lamp is easily damaged by passing ships in use, causes the navigation beacon lamp to be damaged, improves maintenance cost, and is inconvenient to install and dismount the navigation beacon lamp. The application provides the following scheme, which comprises a floating body, an installation cover upper end is provided with an installation assembly, the floating body, the installation cover and the navigation beacon lamp form a tumbler structure, the floating body is provided with three anchor ropes on both sides, and the three anchor ropes form a stable triangular positioning structure. The device can improve the balance performance and stability of the device, reduce the weight of the structure, avoid affecting the work of the navigation beacon lamp, reduce the maintenance cost, facilitate the installation and dismounting of the navigation beacon lamp, and is simple and convenient to operate and use.

The utility model belongs to the technical field of navigation marks, and particularly relates to a navigation mark lamp fixing device convenient for operation of an unmanned aerial vehicle, which comprises a lamp lifting handle, a lamp fixing block, a bead shifting rod brake block, a lamp guide block, a bead shifting locking rod and a lamp guide rod, the lamp fixing block is located on the lower portion of the lamp, and the bead shifting rod brake block is located on the lower portion of the lamp fixing block. The lamp, the lamp fixing block and the bead shifting rod brake block are positioned on the inner side of the lamp lifting handle; the lamp guide block is located on the lower portion of the lamp lifting handle, and the shifting bead locking rod and the lamp guide rod are sequentially arranged on the lower portion of the lamp guide block. Locking and loosening of the shifting beads on the shifting bead locking rod are achieved through control of the lamp lifting handle, and the effects that the unmanned aerial vehicle grabs the beacon light stably and the beacon light is fixed to the base are achieved; and by arranging a lamp guide block and a bead shifting rod brake block for limiting and braking a bead shifting locking rod, the stability of the beacon light fixing device is further enhanced, and the operation of replacing the beacon light by the unmanned aerial vehicle is more reliable.

The utility model relates to the technical field of buoys, in particular to a buoy lamp support made of ultra-high molecular weight polyethylene materials, which comprises four main supports and a beacon lamp, a plurality of connecting corner fittings are fixedly arranged on the side faces of the four main supports through bolts, and the connecting corner fittings are connected with the beacon lamp through bolts. The connecting corner pieces located at the same height are fixedly connected with the two ends of the transverse supports through bolts, the four transverse supports at the same height are arranged in a frame shape, the upper ends of the four main supports are fixedly connected with the bottom of the installation base, the installation base is in a # shape, and the side face of the installation base is fixedly connected with the inner side face of the protection ring. The buoy lamp support made of the ultra-high molecular weight polyethylene material has the advantages of corrosion resistance, aging resistance, light weight and the like, on-site installation and later maintenance are facilitated, the beacon lamp can ascend and descend, climbing operation is not needed, and the safety and convenience of subsequent maintenance personnel are improved.

The utility model belongs to the technical field of channel traffic signs, and particularly relates to a novel cylindrical floating lamp support which comprises a floating lamp support body, the floating lamp support body comprises a lamp support connecting frame, a cylindrical pipe is arranged above the lamp support connecting frame, a battery box is arranged on the lamp support connecting frame located in the cylindrical pipe, and the battery box is connected with the cylindrical pipe. The periphery of the cylindrical tube is provided with a hopeful plate, a protective ring assembly is arranged above the cylindrical tube, a top trademark support is arranged above the protective ring assembly, a top trademark blade is arranged above the top trademark support, and the protective ring assembly located on the inner side of the top trademark support is provided with a lamp base; a solar panel support is arranged on the outer side of the retainer assembly. The anti-collision device is reasonable in design, simple in structure and convenient to machine, the anti-collision performance of equipment can be improved, the possibility of damage is reduced, the connection stability between equipment parts is guaranteed, and the use requirement is met.

The invention discloses a beacon light device powered by flow-induced vibration. The device comprises a floating body supporting assembly, a vibration energy harvesting system, a gear set, a power generation unit and a beacon light. The energy harvesting structural body drives the vibration transmission structure through the dowel bar and is in linkage with two stages of gears (a first pinion, a large gear and a second pinion) through a double-side rack, and conversion from kinetic energy of ocean current to electric energy is achieved. The two groups of independent power generation units operate in parallel, and 50% power supply capability is maintained when a single machine fails; the vibration transmission structure is suspended in the middle of the limiting spring through the spring hanging structure, and the mechanical loss is reduced by combining a low-friction lining of the linear guide rail; the energy harvesting structural body can be configured to be a cylinder, a square cylinder or a triangular prism, and is adaptive to different flow velocity environments.

The utility model provides a ship navigation aid indicating lamp, which relates to the technical field of aid-to-navigation indicating lamps and comprises a base, a floating air bag is arranged on the outer side of the base, a mounting seat is arranged on the top of the base, a rotating seat is arranged on the inner side of the mounting seat, and a mounting lamp holder is arranged on the top of the rotating seat. An LED lamp is arranged on the outer side of the mounting lamp holder, a protective shielding assembly which is located on the outer side of the mounting lamp holder and extends to the top of the mounting lamp holder is arranged at the top of the mounting seat, and a mounting limiting assembly penetrating to the inner side of the protective shielding assembly is arranged at the top of the protective shielding assembly. According to the ship navigation aid indicator lamp, through matched installation of the protective shielding assembly and the installation limiting assembly, the protective lampshade of the ship navigation aid indicator lamp supports rapid disassembly and assembly under the condition that a circuit is not affected, compared with the prior art, the ship navigation aid indicator lamp effectively facilitates disassembly, assembly and maintenance of operators, and the manual maintenance time is shortened.

The invention relates to the technical field of detection radars, in particular to a small target detection radar for navigation, a communication control method and a navigation guarantee system. The radar comprises a communication unit, a lamp unit and a radar unit from top to bottom. The communication unit comprises a communication antenna located at the top and a control module; the lamp units are arranged on entity buoys on the two sides of a channel. The radar unit comprises a radar antenna and a radar driver, and 360-degree full-angle target scanning and tracking are achieved. The system provides target position, speed and course information for a ship through radar data and AIS early warning. Visibility data is reserved through the monitoring platform, and meteorological research and maritime affair supervision are supported. Radar detection, lighting technology, AIS information and image data are used for collaborative analysis of the channel state, intelligent start-stop control is achieved based on visibility data, the system can be applied to scenes such as buoys and lamp piles, and the marine small target detection capability and the navigation safety management level are remarkably improved.

The utility model provides a port channel lighting device which comprises a lamp holder fixedly connected with a floating plate and a lampshade detachably connected to the lamp holder, a lamp body used for lighting is fixed to the lamp holder, a plurality of circles of water absorption cotton strips are fixed to the portion, on the periphery of the lamp body, of the lamp holder, a plurality of circles of sealing strips are arranged below the lampshade, and a containing cavity is formed in the portion, between the sealing strips, of the lampshade. And the top end of the water-absorbing cotton strip extends into the accommodating cavity. Aiming at the problems existing in the prior art, the port channel lighting device is tight in sealing, prevents water vapor from entering the lamp body, and prolongs the service life of the lighting device.

An autonomous cruising system is capable of discriminating a port sign and a starboard sign without depending on a position of a ship. The system includes processing circuitry that acquires an image generated by a camera installed in a ship. The processing circuitry identifies whether a mode of a lateral buoy included in the image is either a first mode or a second mode. The processing circuitry determines a country to which a position of the ship detected by a position detector belongs. The processing circuitry determines whether description of a sign of the lateral buoy is the port sign or the starboard sign, from the mode of the lateral buoy and the determined country, based on a given correspondence relationship indicative of whether each of the first mode and the second mode corresponds to either one of the port sign and the starboard sign in each country.