110results about How to "Ensure navigation safety" patented technology

The invention discloses a water unmanned ship local hierarchical path planning method based on the navigation error constraint. The method mainly includes the steps of local static path planning based on the navigation error constraint and combined with a genetic algorithm; local dynamic path planning fused with the maritime affair rule. The hierarchical thinking is adopted, local path planning is divided into two levels of static path planning and dynamic path planning, the static barrier avoiding problem is solved, and the dynamic barrier avoiding problem is also solved. According to static path planning based on the navigation error constraint and combined with the genetic algorithm, adverse influences of navigation errors on path selection are reduced, and the safety of path planning is improved; according to dynamic path planning based on the marine affair rule, the dynamics constraint of a water unmanned ship is considered, and the feasibility of path planning is improved.

The method for realizing secure transmission of an Automatic Dependent Surveillance Broadcast Information includes: (1) a three-level vertical management system is constructed according to the Aviation Management & Controlling Center, the flight information region and the control area subordinated to the flight information center; the lowest level is ADS-B user belonging to each control area, and the ADS-B user communicates with the control area server that ADS-B user belongs to by means of independent mutual certification mode; (2) at the beginning stage of the planning air line safety period, the Aviation Management & Controlling Center allots a temporary identity for the ADS-B user, establishes a mapping relationship from the temporary identity to a true identity and send the mapping relationship to the administration of the flight information region which the ADS-B user planning air line passes through; before the ADS-B user takes off, the administration of the control area that the ADS-B user belongs to secretly provides the ADS-B user with the temporary user identity and double factor symmetric-key in the server, and public key information of the server identification and the server message authentication code of the ground server near the planning air line. The invention can effectively resist a plurality of active attacks, realize security certification and ensure the safety of ADS-B information transmission.

The invention discloses a ship navigation path planning method, system, medium and equipment, and the method comprises the steps: building an offshore logistics condition model, determining the numberof ports and ship carrying capacity of a ship navigation area according to the ship navigation plan, an offshore climate environment and the change condition of topography and geomorphology in a route, and determining the number of ships needing to be dispatched; constructing an objective function and a constraint condition of an optimal path for the paths of the ships needing to be dispatched among different ports; establishing a ship navigation path optimization model; combining historical data of a ship navigation plan; and calculating an optimal navigation path by adopting an ant colony algorithm: initializing defined parameters, converting port coordinate information into a distance matrix between ports, searching for paths between different ports by utilizing ants, recording iteration times and updating pheromone concentration according to path lengths, and outputting the optimal path after the maximum iteration times are reached. According to the invention, the economic cost consumed by offshore logistics and invalid driving of the ship are reduced, and the economic benefit is improved.

The invention discloses a ship electric propulsion system with hybrid power supply of a diesel generator set and a power battery. The system comprises a ship control system, a power system, a distribution board and an electric propulsion system, wherein a power management controller and a propulsion manipulation controller are arranged in the ship control system; the power system is connected with the electric propulsion system through the distribution board; the power system and the distribution board are connected with the power management controller respectively; and the electric propulsion system is connected with the propulsion manipulation controller. A shore power distribution box, a diesel generator set and a power battery pack are arranged in the power system; a frequency converter is arranged in the electric propulsion system and connected with a propulsion motor; the propulsion motor is connected with a propeller; a busbar is arranged in the distribution board and provided with a main switch and a load switch; the main switch is connected with the generator set; and the load switch is connected with the frequency converter. By adopting the hybrid power supply mode of diesel generator set and power battery, the safe sailing of the ship is ensured, and the continuation performance of the ship is improved.

The invention discloses an electric propulsion system for hybrid power boats and an implementation method thereof, wherein the electric propulsion system is suitable for inland river medium and small-sized river boats and comprises a power battery used as a system main power supply and a diesel generator set used as an auxiliary power supply. When a boat berths alongside and suspends shipping services, the power battery is charged by a shore power so as to store electric energy; when the boat sails normally, the electric propulsion system is powered by the power battery; when the stored electric energy of the power battery are completely consumed or the power battery goes wrong in the process of sailing, the auxiliary diesel generator set automatically starts and puts into operation so as to continue to supply power for the electric propulsion system to maintain the sailing of the boat; and in emergency, the power battery and the diesel generator set work together to supply power for the electric propulsion system so as to ensure the sailing safety of the boat. By using the system and the implementation method of the system disclosed by the invention, boats can realize zero discharge of waste gas / water, and remarkable effects of energy saving and expenditure cutting are generated; meanwhile, the hybrid power supply mode of the power battery and the diesel generator set ensures the sailing safety of a boat and improves the duration performance of the boat.

The invention discloses an oil spillage tracking system based on a vessel traffic management electronic information system. The oil spillage tracking system comprises a vessel traffic management electronic information system, an oil spillage monitoring and tracking system, an oil spillage information collecting module and an outside information terminal, wherein the vessel traffic management electronic information system is respectively connected with the oil spillage monitoring and tracking system and the outside information terminal; and the oil spillage monitoring and tracking system is connected with the outside information terminal by the oil spillage information collecting module. According to the invention, the vessel traffic management electronic information system and the oil spillage monitoring and tracking system are integrated with each other to realize information sharing and exchanging between the two systems; therefore, functions, such as information service, navigation service, traffic organization service, collaboration service and the like, of the vessel traffic management system are preferably completed. When an oil spillage accident occurs, the vessel traffic management information system can be used for implementing traffic control within a warning region so as to ensure the navigation safety; therefore, powerful information support and reliable guarantee are provided for strengthening law enforcement of marine pollution monitoring.

The invention discloses a dynamic risk management method for a service water domain in vessel traffic. The method is performed according to the following steps of (1), constructing an evaluation indexsystem; (2), establishing an evaluation word set; (3), determining an evaluation index weight; (4), establishing an evaluation model; (5), inputting data; (6), calculating a risk value by means of the evaluation model; and (7), according to an electronic sea chart system, respectively representing a high risk, a middle risk and a low risk by a red color, a yellow color and a green color, and performing relatively visual risk reminding, and supporting decision of an operator. The dynamic risk management method according to the invention focuses on analysis of a real-time traffic flow. The dataof real-time traffic flow come from harbor ship data of a VTS. Risk reminding is performed on on-duty personnel of the VTS in a relatively short time interval. High navigation safety of ships in theharbor is ensured.

The invention discloses a method for inquiring heavy load of ship power station power management. The method presets an abrupt change quantity of power station load power and makes a reasonable judgment so as to avoid whole ship power off accidents caused by electric network breakdown due to abrupt changes of the load power and ensure the navigational safety of a ship. The method mainly comprises the following steps: calculating the gross capacity nPe of a generating set; calculating the actually output total power sigmaPi; calculating the potential change quantity Pa (Pa=Pmax-Po) of an input high-power load, wherein the Pmax is the rated power of the high-power load, and the Po is the initial power of the high-power load in running; calculating the value of P (P=nPe-sigmaPi-Pa-Ps), wherein the Ps is the power of a high-power load to be input; and judging whether the value of the P is larger than an allowed power margin D1, if so, allowing the high-power load to be started, otherwise, inputting a standby generator, and judging whether the high-power load is allowed to be started again.

The invention discloses a ship professional loading calculating system which helps a navigator to account ship floatation condition, stability and strength, and optimizes running longitudinal trim of a ship, and simulates a ship loading process. The system is a ship loading instrument The system comprises four sub-calculation systems of ship performance calculation, ship performance check, ship longitudinal trim optimization, and ship loading process real-time simulation. Through selecting different sub-calculation systems and cooperation among the sub-calculation systems, and inputting corresponding ship parameters, a basic data condition of safe and economical navigation of the ship can be obtained. The invention also provides a method for ship floating state adjustment, stability and strength accounting, longitudinal trim optimization, and ship loading process real-time simulation by using the above software. The system can ensure ship loading and navigation safety, and simplifies ship loading operation and saves energy, so as to improve security and economical efficiency of shipping, and reduce burden of navigators to a large extent.

The invention discloses a simulation method for scheduling a multi-code channel. The simulation method comprises the following steps: (1) analyzing the current situation of the channel and building a scheduling model; (2) designing a target performance function and solving a scheduling scheme for scheduling the channel based on a simulated annealing algorithm; (3) introducing a heuristic scheduling rule and improving the simulated annealing algorithm; and (4) combining a risk exceeding index, simulating, comparing and analyzing the schemes before and after improving the algorithm to judge the scheduling scheme. The method not only can supply powerful technology support and scientific basis for scheduling the operation of ships under complex navigation conditions, but also can ensure the ship navigation safety of the ships under the complex navigation conditions and increase the utilization rate of the channel resource, and has very important practical significance for guaranteeing a good ship navigation environment and ship navigation order of the channel.

The invention provides a multi-water-level-station-linked inland river water level intelligent prediction method. The method comprises the steps of S1, preparing sample data, and performing vacancy value filling and SG filtering smoothing processing on the sample data; S2 constructing a three-water-level-station linkage prediction model based on the GRU; and S3, training and predicting the three-water-level-station linkage prediction model constructed in the step S2 by adopting forward propagation and reverse propagation. According to the technical scheme, a water level prediction model is constructed by using a GRU (gated recurrent unit) recurrent neural network. The difference between the scheme and the prior art is that the time relationship of water level values and the space relationship between water level stations are considered. In order to predict the water level value of a certain water level station. The scheme not only depends on the historical data of the water level station, but also utilizes the historical data of the adjacent upstream and downstream water level stations to assist in establishing a prediction model. Therefore, the error of single station data is reduced. The general law of water level change is better reflected and the accuracy of water level prediction is improved.

The invention relates to a special-shaped energy dissipation caisson, which comprises a box body and an energy dissipation device, wherein the box body comprises a permeable area with the front part communicating with the rear part, the energy dissipation device is arranged in the upper half of the permeable area, the side surface of the energy dissipation device is matched with the side surface of the permeable area, a water passage is arranged between the bottom surface of the energy dissipation device and the bottom surface of the permeable area, the front surface of the energy dissipationdevice is arranged behind relative to the front surface of the box body, the energy dissipation device comprises a cavity, the front wall of the cavity is provided with a perpendicular perforated plate which comprises perpendicular strip through holes in the vertical direction, so that the front surface of the energy dissipation device communicates with the cavity., the lower wall of the cavity isprovided with a horizontal perforated plate which comprises horizontal perforated holes in the transverse direction, so that the cavity communicates with the water passage, and the rear wall of the cavity is provided with a wing plate. The design of the special-shaped energy dissipation device of the special-shaped energy dissipation caisson provided by the invention can effectively reduce wave energy, improve the free exchange capacity of sea water and prevent ecological isolation. The velocity of flow at the entrance is reduced to ensure navigation safety. The caisson is light in structure,reduces investment outlay, and is good in structural stress. The modular design makes manufacturing and installation simple and efficient.

The invention discloses a wall-mounted movable deck with a cargo fixing airbag. The wall-mounted movable deck with the cargo fixing airbag comprises a left deck and a right deck, which are hinged with a cabin wall, wherein the left deck and the right deck are both connected with a lifting mechanism; when the movable deck is lifted, the right side edge of the left deck is horizontally abut-jointed with the left side edge of the right deck and fixedly connected with the left side edge of the right deck through a bolt mechanism; the bolt mechanism comprises 15-35 bolts which are arranged on the deck on one side and arranged in the form of a straight line; the deck on the other side is provided with bolt holes corresponding to the bolts; a buffering airbag is arranged in the deck; a plurality of extruding airbags for fixing cargoes are arranged under the buffering airbag; and the buffering airbag are connected with the extruding airbags. According to the invention, problems that the movable deck in the prior art is troublesome to mount and demount and the ship running stability is affected because cargoes are easy to slide or shake in the ship running process due to gap between the deck in the prior art and cargoes in a lower cabin are effectively solved; and the wall-mounted movable deck realizes very high practical values.

The invention relates to the technical field of rescue submersible vehicles, in particular to an air bag type intelligent floating assisting rescue submersible vehicle. The air bag type intelligent floating assisting rescue submersible vehicle comprises a rescue submersible vehicle body. The rescue submersible vehicle body is provided with an induction device, air bag devices, balance wings, a nacelle type pump spray propeller and an electromagnet attraction device. The rescue submersible vehicle body is driven through a submersible vehicle launching base. The air bag type intelligent floating assisting rescue submersible vehicle is mainly designed for the Nansha Islands, a submersible vehicle launching base is established on an island, once an accident happens to a ship in the corresponding sea area, the ship can send out a rescue seeking signal to the submersible vehicle launching base through the satellite remote sensing technology and report the position and speed information of the ship, a rescue ship is then sent out from the submersible vehicle launching base, the navigation track of the rescue ship is intelligently calculated, so that the accident ship is found and rescued, and the ship navigation safety is effectively guaranteed.

The invention discloses an operating method for an electric hydraulic water spraying unit of a ship propulsion system. When an electric hydraulic water spraying propulsion device is started to advance, a storage battery pack supplies power to bidirectional oil hydraulic pump stations through circuits, and through a circuit control center, the two or more bidirectional oil hydraulic pump stations on the two sides are controlled simultaneously to control hydraulic cylinders on the two sides to simultaneously advance and retreat correspondingly; and a water pressure piston in a water pressure cabin on the other side retreats while a water pressure piston in a water pressure cabin on one side advances, and the water pressure pistons in the water pressure cabins on the two sides conduct propulsion alternately according to advancing and retreating to push a ship or an underwater vehicle to navigate. The hydraulic cylinders are driven through the storage battery pack and drive the water pressure pistons to travel to and from the interior of the water pressure cabins, water in the water pressure cabins is pressurized, and thrust of water spraying acts on a ship body to advance forwards; and the mute effect is good, energy conservation and emission reduction are achieved, and safety of the ship and the underwater vehicle navigating underwater can be guaranteed.

The invention discloses an automatic anti-collision device and method for a tower-shaped mast. A horizontal shaft is arranged on a mast base frame and is hinged to the lower part of the mast; a mast motor arranged on the mast is meshed with a deceleration gear through a driving gear and an intermediate gear; a fixed gear which is coaxial with the horizontal shaft is arranged on the mast base frame; the deceleration gear is meshed with the fixed gear; a balancing weight is arranged at the tail end of the mast, under the horizontal shaft; a barrier detector for detecting barriers in front of a ship in the sailing direction and a barrier sensor for detecting barriers above the ship are respectively arranged on both sides of the mast base frame. The automatic anti-collision device effectively solves the problem that a conventional mast lifter is liable to cause collision accidents due to neglect or wrong judgment. The automatic anti-collision device for the tower-shaped mast, which is disclosed by the invention, can automatically detect barriers and can automatically put down the mast, so that the sailing can be guaranteed safe; the automatic anti-collision device has a high practical value.

The invention discloses an anti-collision device and method for a column-shaped mast. A horizontal rotating shaft is arranged on a mast base frame; a sliding sleeve is fixed to the middle of the horizontal rotating shaft; the mast is arranged in a sliding sleeve in a penetrating manner, and a tooth bar is arranged on the outer wall of the lower half part of the mast in the axial direction; a mast motor is meshed with the tooth bar through a mast driving gear and a mast lifting gear; a fixed gear which is coaxial with the horizontal rotating shaft is arranged on the mast base frame; the mast lifting gear is meshed with the fixed gear through a deceleration gear set; a swinging barrier detector is arranged on the mast base frame. The anti-collision device for the column-shaped mast further comprises a control device and an alarm device, wherein the control device is connected with the mast motor, the barrier detector and the alarm device. The automatic anti-collision device effectively solves the problem that a conventional mast lifter is liable to cause collision accidents due to neglect or wrong judgment. The automatic anti-collision device for the column-shaped mast, which is disclosed by the invention, can automatically detect barriers and can automatically put down the mast, so that the sailing can be guaranteed safe; the automatic anti-collision device has a high practical value.

The invention discloses an embedded type power station monitoring device for a total electric propulsion ship, mainly solving the technical problems on improving the instantaneity, reliability, safety and the like of the control of a ship power station monitoring system. In a technical scheme adopted by the invention, the power station monitoring device comprises an embedded type power station controller respectively connected with an interface expansion unit, an operation unit and a monitoring unit, and the embedded type power station controller is connected with a power generator set, is connected with a main distribution board through the interface expansion unit, and is also connected with a propulsion control system. The power station monitoring device realizes automatic control of the power generator set, active power distribution, reactive power distribution, load management and system monitoring and alarming and is suitable for monitoring the power stations of various total electric propulsion ships.

A ship cruising early warning dynamic monitoring method comprises the following steps of S1, communicating with a ship and obtaining ship data; S2, calculating a ship navigation space scope; S3, obtaining ocean data and forming a data set; S4, using an algorithm to optimize the data set; S5, forming a dangerous area; and S6, transmitting data of the dangerous area to the ship. The ship data comprise the current navigation position and the current navigation speed. The ship navigation space scope is a round area with the current navigation position at the center and the 24-hour line navigation distance as the radius. The ocean data comprise sea wind data and sea wave data. The method is advantaged in that the dangerous area where the ship may reach in 24 hours can be rapidly and effectively displayed; dynamic query and monitoring ensure the ship navigation safety; the data collection method improves the accuracy of early warning and provides auxiliary support for making a safe navigation decision for the ship; and an improved Jarvis algorithm is used to shorten the working time and improve the working efficiency.

The invention discloses an automatic lifting device and method of a cylindrical mast. A horizontal rotating shaft is arranged on a mast base frame. A sliding sleeve is fixed to the middle of the horizontal rotating shaft. The mast penetrates in the sliding sleeve. The outer wall of the lower half part of the mast is axially provided with a rack. A mast motor is engaged with the rack through a mast drive gear and a mast lifting gear. The mast base frame is provided with a fixing gear coaxial with the horizontal rotating shaft. The mast lifting gear is engaged with the fixing gear through a reduction gear set. Swinging type obstacle detecting devices are arranged on the two sides of the top of the mast. The automatic lifting device of the cylindrical mast further comprises a control device and an alarm device. The control device is connected with the mast motor, the obstacle detection devices and the alarm device. The automatic lifting device and method effectively solve the problem that a mast lifting device in the prior art is likely to cause collision accidents due to negligence or misjudgment. The automatic lifting device of the cylindrical mast can automatically detect an obstacle and automatically place the mast down, the navigation safety is ensured, and high practical value is achieved.

The present invention provides a ship navigation system and a ship navigation method. Laser signals are transmitted and received through a laser radar to form point cloud data, radar calibration is carried out through radar calibration equipment, conversion from a laser radar coordinate system to a ship coordinate system and fusion of point clouds at all positions are completed, and very high frequency antenna signals are received through an AIS receiver to form AIS data. The industrial personal computer equipment receives point cloud data from the radar calibration equipment and AIS data from the AIS receiver at the same time, the industrial personal computer equipment carries out collision risk calculation and carries out early warning on ship collision risks, the industrial personal computer equipment carries out point cloud target identification and point cloud data and AIS data matching, and ship driving is assisted through visualization processing. According to the invention, the collision risk is calculated in real time, the navigation safety is ensured, the point cloud information is identified and overlapped with the AIS information for imaging, the inland ship driving is assisted, and the navigation safety is improved.

The invention discloses a shallow sea obstacle zone OBC seismic focus acquisition construction method, and belongs to the technical field of OBC seismic acquisition and marine geological survey in the shallow sea with an obstacle. The method comprises the steps that (1) fine scouting is carried out, and the specific position of the obstacle in a work zone is determined; (2) the coordinates of the obstacle are drawn on acquisition design software such as Klseis software or green mountain software; (3) obstacle avoidance and encryption design are carried out according to the obstacle on the acquisition design software; (4) after the obstacle avoidance and encryption design are carried out on the obstacle, the acquisition design and processing software is used for analyzing the shot point deletion and data gap phenomena, and it is determined that the degree of covering, the data gap and the like meet the related technical requirement; (5) construction is carried out according to the obstacle avoidance and encryption design.

The invention discloses a fin stabilizer and a ship, and belongs to the technical field of ship equipment. The fin stabilizer comprises a fin stabilizer body, a power generation assembly, a torsion shaft, a driving part and a monitoring assembly, wherein the fin stabilizer body comprises a fin surface arranged in the circumferential direction and a first end surface arranged at the end, and the first end surface is arranged close to the ship body; the power generation assembly is arranged on the fin surface; the torsion shaft is connected with the first end surface and the ship body, the driving part is arranged on the ship body, the output end of the driving part is connected with the torsion shaft, and the driving part drives the fin stabilizer body to rotate around the axis of the torsion shaft through the torsion shaft to adjust the fin surface; and the monitoring assembly is electrically connected with the driving part and the power generation assembly separately. The ship comprises the fin stabilizer. The fin stabilizer and the ship have the advantages that stabilization, energy conservation and timely deceleration or emergency braking can be realized, the energy consumptionof the ship can be reduced, the navigation endurance is improved, the operation safety of the ship is improved, and the intelligent degree is high.

The invention discloses an advertising ship, comprising an engine room, a helm cabin, a cargo compartment, a crew room and a cab, wherein, the front end of the advertising ship is provided with the cab; the rear end of the advertising ship is provided with the engine room, the helm cabin and the crew room; the middle of the advertising ship is provided with the cargo compartment. The invention is characterized in that a heavy steel frame with a stainless steel screen laid on the facade is arranged on a main deck and between the front part of the cargo compartment and the crew room, and the heavy steel frame is provided with an advertising setting; a distributor box is arranged inside the engine room; one end of the distributor box is connected with an electric generating set of the engine room, while the other end of the distributor box is connected with the advertising setting which is an advertising word, an advertising picture, an LED screen and a style advertisement. The invention has the advantages that the ship body of the advertising ship is taken as the advertising carrier, and a movable advertising platform can be formed on waters.

The invention provides a ground user navigation and positioning method based on a Beidou Ka inter-satellite link signal. The method comprises that it is supposed that between epochs k-1 and k (k=1, 2,3...), a user in an area with a Beidou inter-satellite signal reception terminal in the ground generate inter-satellite link unidirectional range finding values with N different Beidou satellites indifferent time, and N range finding equations are obtained; (2) user positions in the range finding equations are reduced to time Tk in a unified way by using a receiver clock model and inertial navigation information; and (3) on the basis of time synchronization of range finding values, the ground user estimates the positions of himself / herself in real time in a Kalman filtering positioning algorithm. Thus, interference and cheating sources aimed at the L-frequency-band navigation signals can be avoided, possible problems caused by failure of the L-frequency-band navigation signals are solvedto certain extent, and the navigation safety of a key area in the special scene is ensured.

The invention relates to a device capable of realizing autonomousdiving and surfacing and quick steering. The device comprises a hull, wherein a propeller is arranged outside the tail of thehull; a steering device which is movably connected with the propeller and used for changing the direction of a water outlet of the propeller is mounted in thehull; the propeller comprises a propeller shaft, the propeller shaft is sleeved with screw blades, and a spline shaft is arranged at one end of the propeller shaft and is connected with a main propellingshaft penetrating through a tail tapered hullthrough a universal coupling. According to the device, ballast loading and unloading are not required, a ballast cabin and a traditional rudder are removed, and autonomousdiving and surfacing and quick steering can be realized.

The invention provides a wave glider collision avoidance method, which relates to the field of wave glider collision avoidance. A collision avoidance detection system, a navigation system, a motion control system and a communication system are arranged, the collision avoidance detection system comprises millimeter wave radars and an AIS receiver, the number of the millimeter wave radars is three,the millimeter wave radars are fixedly installed at the front end of the wave glider, the installation directions of the millimeter wave radars are forward, leftward and rightward respectively, a pathcontrol algorithm control module is embedded in the navigation system, and the navigation system communicates with the millimeter wave radars through a CAN bus. Through the design of the collision avoidance detection system, the method achieves the collision avoidance function of the wave glider, guarantees the navigation safety of the wave glider, can take corresponding avoidance measures according to different obstacles, and is more reliable in use.

The invention discloses a green energy, small waterplane and improved catamaran unmanned boat for marine environmental monitoring. The unmanned boat includes a superstructure, a small waterplane improved double-sheet body main boat body, a boat body monitoring and motion intelligent control system, a navigation planning and decision-making system, and an environmental monitoring system. The unmanned boat adopts a small waterplane catamaran as a carrier, optimal calculation is performed in boat type parameters of the small waterplane catamaran by comprehensive optimization software, a scheme with best navigation performance for a main function of marine meteorological monitoring is obtained, wave-making and interference resistance between sheet bodies are effectively reduced, through combination of the advantages of small wave-making resistance, large deck area, good wave resistance, small navigation resistance and good stability of the small waterplane catamaran itself, a stable working environment can be provided for various monitoring equipment, and its better navigation performance can meet working requirements of the unmanned boat in offshore and distant sea water areas.

The invention discloses an on-line evaluation method of anchor chain flash butt welding quality based on DTW and MDS. The method comprises: creating a 2L*2L database E1 of size 2L*2L; 2, judging whether the system detects a new signal to be tested or not, if yes, then executing step 3; If no, stopping the welding and ending the system process; 3, collecting signals to be tested; 4, carrying out data preprocessing on that signal to be measured; 5, respectively calculating that dissimilar distance between the signal to be measured and the selected 2L historical data; 6, establishing a dissimilardistance matrix E2 of size 2L*1; 7, combining that matrices E2 and E1 to form a dissimilar distance matrix F with the size of (2L +1) * (2L +1); 8, carrying out dimensionality reduction treatment onthat dissimilar distance matrix F to a matrix G of (2L +1) * P; 9, carrying out clustering analysis on 2L +1 P-dimensional data in that matrix G; 10, judging whether that signal to be tested is clustered into a normal signal class or not, if not, processing the fault signal; If yes, determining the signal to be measured as a normal signal, and processing the normal signal; 11, returning to that step 1 to update the database E1; The invention can quickly and effectively identify the faulty welding product, improve the production efficiency and ensure the welding quality.

The invention discloses a cylindrical mast lifting device and method. A mast base frame is provided with a horizontal rotating shaft. A sliding sleeve is fixed to the middle portion of the horizontal rotating shaft. A mast penetrates through the sliding sleeve. The outer wall of the lower half part of the mast is axially provided with a rack. A mast motor is meshed with the rack through a mast driving gear and a mast lifting gear. The mast base frame is provided with a fixing gear coaxial with the horizontal rotating shaft. The mast lifting gear is meshed with the fixing gear through a speed reducing gear set. A swinging type obstacle detecting device is arranged on the top of the mast. The cylindrical mast lifting device further comprises a control device and an alarm device. The control device is connected with the mast motor, the obstacle detecting device and the alarm device. The cylindrical mast lifting device and method effectively solve the problem that a mast lifting device in the prior art causes collision accidents easily due to negligence or misjudgment. The cylindrical mast lifting device can automatically detect an obstacle and put down a mast, the navigation safety is ensured, and very high practical value is achieved.