3695results about How to "Increase job security" patented technology

The invention relates to a hoisting derrick specially for coiled tubing equipment. The hoisting derrick comprises a derrick transportation supporting platform, a derrick swinging base, a derrick telescopic boom, a first telescoping cylinder and second telescoping cylinders, which are connected with one another through rotation and articulation; the hoisting derrick is characterized by also comprising an injection head mounting platform, wherein lever arms are arranged on the injection head mounting platform, one ends of the level arms are fixedly connected with the injection head mounting platform, the other ends of the level arms are articulated with the plunger piston ends of the second telescoping cylinders, the cylinder body ends of the second telescoping cylinders are articulated with the derrick telescopic boom, and the level arms and the second telescoping cylinders are arranged in pairs and are arranged on two sides of the derrick telescopic boom respectively. The hoisting derrick has the beneficial effects that the injection head and an oil well can be centered rapidly, the labor intensity of workers is reduced and the mounting cost is reduced.

The invention relates to a multifunctional blending and liquid supplying vehicle, which comprises a chassis, wherein an operation platform, a hydraulic oil tank, a dry powder feeder, an operation box for an electrical control system, a lorry-mounted crane and a liquid adding tank are fixedly arranged above the main beam of the chassis, wherein a centrifugal pump, an exhaust manifold and a suction manifold are arranged on each of two sides of the middle part of the main beam of the chassis, the exhaust manifold is communicated with the water outlet of the centrifugal pump, and the suction manifold is communicated with the water inlet of the centrifugal pump; the liquid adding pump is fixedly arranged on the side wall of the liquid adding tank, the water inlet of the liquid adding pump is communicated with the liquid adding tank, and the water outlet of the liquid adding tank is communicated with the exhaust manifold; a discharge opening in the lower end of the dry powder feeder is communicated with the exhaust manifold; the engine of the chassis is connected with a hydraulic pump, and the hydraulic pump is connected with the centrifugal pump, the lorry-mounted crane, the liquid adding tank and the liquid adding pump through a hydraulic multiway valve; the electrical control system is connected with the engine of the chassis, the hydraulic pump and the hydraulic multiway valve. The multifunctional blending and liquid supplying vehicle provided by the invention is low in cost, high in working efficiency, and can achieve various oil field operation functions.

The invention discloses a medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method which comprises the following steps: dividing chamber jambs along the trend of an ore body; adopting a rail-less mining aligning system; pre-constructing a high-strength reinforced concrete artificial top in a segmented drilling lane; adopting a stoping sequence from up to down; performing drilling and blasting ore removal on the ore body through the segmented drilling lane at bottom; adopting medium-length hole drilling and remotely controlling a scraper to discharge ore; after finishing the mining of the chamber, utilizing concrete tailings to perform cemented filling; after finishing the mining of the jambs, utilizing concrete tailings or pure tailings to perform cemented filling; after completely stoping the mine chamber in the frame under the protection of the concrete artificial top, starting to stope the jamb adjacent to the segment, and meanwhile stoping the corresponding mine chamber in the frame of the next segment, and then stoping the corresponding jamb of the next segment; and after completely mining the chamber jamb in the middle segment, immediately turning towards the lower middle segment for stoping. The method provided by the invention has the advantages that the safety for mining the heavy-pitch medium thick crushed or ultra-crushed ore body is high, the resource depletion loss rate is low, the mechanical degree is high, the production capacity is high, and the like.

The invention provides a purge valve (1) for a pressure cooker (2). The valve (1) has a valve body (5) forming a seat (6), and an obturating element (7) designed to move from an opening configuration in which the element is separated from the seat and authorizes leak of a gas flow (F) from the chamber to a closing configuration in which the element sealingly contacts the seat and ensures sealing of the chamber under effect of pressure reigning within a cooking chamber. An elastic return unit (8) is distinct from the body and / or the element, and arranged to stress the element toward the opening configuration against the pressure. An independent claim is also included for a pressurized cooking appliance e.g. domestic pressure cooker or autoclave.

The invention discloses a station locomotive regulating autopilot system which is relative to a station comprehensive integrated automatic system. Furthermore, as a component of the station comprehensive integrated automatic system, the station regulating autopilot system is used to enable the locomotive regulation to automatically control running of the locomotive according to a locomotive regulating and shunting operation plan, in coordination with ground shunting route automatic control and under the support of the comprehensive integrated automatic system. The invention works under the environment of the station comprehensive integrated automatic system and on the precondition of integrated management control, information sharing and exchange. The locomotive regulating autopilot system of the invention further develops functions based on a marshalling station locomotive regulating automatic system which is another patent of invention of the applicant.

The invention discloses an unmanned roadway driving and anchoring all-in-one machine. The unmanned roadway driving and anchoring all-in-one machine comprises a driving system, a conveying system, a temporary support system, an anchoring system, a driving all-in-one machine water system, a sensing system and an electrical control system. A feed moving roller at the connection portion between a shovel of the driving system and the front end of the conveying system can prevent feed clogging at the shovel and the front end of a scraper conveyor. The temporary support system is uniform in supporting, can move relative to the driving and anchoring all-in-one machine to achieve no-deferring synchronization of driving, supporting and anchoring and can be adapted to the round, uprightly oval, approximately oval or rectangular cross section of a roadway to be applicable to driving and supporting operations of roadways of a variety of ground pressure and directions. The sensing system and the electrical control system of the driving and anchoring all-in-one machine can effectively collect and process information such as, light, distance, humidity and gas and the electrical control system performs automatic or remote manual analysis so as to achieve unattended operations in the working process and greatly improve the safety factor of the operations.

The invention discloses an intelligent maintenance system and method based on a wearable augmented reality display terminal and a cloud platform. According to the intelligent maintenance system and method, an augmented reality technology-based infrared image intelligent identification, video collection and uploading of personnel operation scenarios and real-time conversation with a monitoring center on the scene are achieved, thereby guiding maintenance personnel to implement standard and normalized work process; an intelligent maintenance platform based on big data and artificial intelligenceis built to carry out inspection optimization, defect identification and fault diagnosis; and auxiliary information is transmitted to an intelligent terminal of site operation personnel to display inreal time through an augmented reality technology, so that the operation efficiency is improved, misoperation is avoided and the intelligent maintenance system and method can be applied to multiple power grid operation and maintenance scenarios.

The invention discloses an anti-magnesium hard water anti-magnesium corrosion environmentally-friendly water soluble cutting solution, which is composed of organic acid, organic amine, corrosion inhibitor, base oil, synthetic ester, surfactant, water and other additives. The invention employs particular surfactant to improve the anti-magnesium hard water performance of the product, employs special compound corrosion inhibitor to enhance the anticorrosion performance of the product, and compounds a plurality of rust inhibitors, lubricants, disinfectants and defoaming agents, the product has excellent anti-magnesium hard water performance, anti-magnesium corrosion performance and operating safety performance, and can heighten the service performance and processing performance of the product greatly. Meanwhile, the product, which is good for environmental protection, is an environmentally-friendly magnesium alloy cutting solution with excellent performances.

The invention discloses a rib-pillar-free continuous sublevel filling method for mining preparation in a medium-thickness slope crushed ore body vein. The method comprises the following steps of: dividing a mine block into panel structures with a plurality of sections and bunches, namely dividing sections in a panel, not leaving a rib pillar in the sections, and dividing continuous extraction units; arranging a slope ramp of the panel on an ore body hanging wall, and arranging sectional roadways namely rock drilling ore removal gate ways in the vein; making all the sectional roadways in the panel mutually communicated, and the allocation and transportation of trackless equipment flexible and convenient; performing quarry central up cutting before the extraction, and ensuring the deep hole construction in a quarry upward sector in good conditions; performing operation such as multiple-section quarry rock drilling, blasting, supporting, ore removing, filling and paralleling; using a rib-pillar-free continuous extraction way backing from two wings of the panel to the center in the same sectional quarry, wherein an extraction process is performed sequentially; and filling a gob with tailings or waste stones. The invention relates to the rib-pillar-free continuous sublevel filling method suitable for medium-thickness slope crushed ore bodies, which has a low mining preparation ratio, low loss and high efficiency and the extraction is safe.

A movable laboratory with high biological safety is composed of primary experiment cabin, person cleaning and technological supporting cabin including clothes exchanging room, buffering room and substance transfer window between them, air-tight flexible connection channel between said both cabins, and the connected water and air pipelines, cables and signal lines.

The invention provides an electric unlocking system and an operation method thereof. An unlocking device, which can receive operation commands and upload unlocking operation states anytime and anywhere, is adopted to unlock a mechanical coding lock, an electric coding lock and other locks preventing anti-misoperation locking. An electric anti-misoperation server of the electric unlocking system and a smartphone or a tablet personnel computer are in communication through various wireless communication networks; a wireless communication circuit of the smartphone or the tablet personnel computer is used for receiving an operation command of the electric anti-misoperation server, and sending the operation state information to the electric anti-misoperation server in real time; the smartphone or the tablet personnel computer and an unlocking device are connected through a short-distance wireless communication manner; and a wireless communication circuit module of a control circuit in the unlocking device is used for receiving the operation command sent by the control circuit of the smartphone or the tablet personnel computer, and uploading the operation state information of the unlocking device to the smartphone or the tablet personnel computer in time. The electric unlocking system and an operation method solve the problems that the operation command is received conveniently and the operation state is not uploaded in real time.

The invention discloses a method for detecting and sorting an integrally-disassembled electric energy meter. The method comprises the steps: arranging the disassembled electric energy meter into an input conveyor belt, and carrying out automatic detection of six functions such as appearance check, electricity and current circulation, storage verification, metering detection, condition judgment and asset sorting on the electric energy meter by adopting an appearance detection device, an electric energy meter metering detection device, and an unqualified electric energy meter spraying code marker. By adopting the method, a plurality of teams, a plurality of workers and a plurality of procedures are integrated, so that the working time can be effectively shortened, the working quality is improved, and the fault analysis of the electric energy meter can be standardized; the manual on-off operation of the electric energy meter can be avoided, and the working safety of the operation workers can be improved.

The invention discloses a visual system and a working method for a high-voltage hot-line operating robot. The visual system for the high-voltage hot-line operating robot comprises an operation end. The operation end comprises a left mechanical arm and a right mechanical arm. The left mechanical arm and the right mechanical arm are both installed on an insulation bucket. A left stereoscopic video camera and a left stereoscopic camera are installed on the left mechanical arm. A right stereoscopic video camera and a right stereoscopic camera are installed on the right mechanical arm. A visible light video camera I is arranged on the front side of the insulation bucket. A video camera support is arranged on the back side of the insulation bucket. A visible light video camera II is arranged at the top end of the support. A ground remote end is connected with the left stereoscopic video camera, the right stereoscopic video camera, the left stereoscopic camera, the right stereoscopic camera, the visible light video camera I and the visible light video camera II. The invention further discloses a working method for the high-voltage hot-line operating robot. Operation staff can be thoroughly free from a high-altitude high-risk working environment, labor intensity is lowered, operation safety is greatly improved, automatic identification of the position and the posture of an operated object is achieved, and automation level and intelligent level of operation are improved.

The invention discloses waste metal treatment equipment. The waste metal treatment equipment comprises a frame body composed of a working platform and a pillar body and a compression device arranged in the frame body; the end face of the bottom of the compression device is internally provided with a compression sliding transport slot, the position, above the compression sliding transport slot, of the compression device is internally provided with a transmission cavity, the position, on the right side of the top of the compression sliding transport slot, of the compression device is internally provided with a locking cavity extending upwards, and the extending portion segment at the top of the locking cavity is located on the right side of the transmission cavity; the inner side wall of the compression sliding transport slot is provided with a guide slot, the compression sliding transport slot is internally connected with a compression sliding transport block in a sliding transport fit manner, the end face of the top of the compression sliding transport block is internally provided with a spiral hole, and the spiral hole is internally in fit connection with a spiral rod; and the guide slot is internally provided with a protruded block, the side, close to the compression sliding transport block, of the protruded block is fixedly connected with the compression sliding transport block, and the right side end face of the compression sliding transport block above the protruded block is internally provided with a locking slot. The waste metal treatment equipment is simple in structure, convenient to operate and high in work efficiency and safety, and quality is improved.

The invention discloses an aerial turbofan engine control method based on a surge margin estimation model. The modeling of the provided surge margin estimation model is divided into two parts, namely an undistorted model during conventional flight and a loss model during super-maneuver flight, wherein the undistorted model is realized by screening the optimal model input and modeling through a nonlinear fitting method based on a surge margin feature selection algorithm; the loss model is realized by estimating the aircraft engine inlet distortion degree based on an online attack angle prediction model and calculating to obtain the surge margin loss during distortion. The stability of an engine is predicted in real time by utilizing the estimation model, a turbine fall ratio control instruction is subjected to margin loss compensation on the basis that a conventional control loop of the engine is not changed, and high-stability control is realized. The aircraft engine can be guaranteed to work stably and efficiently, and the surge margin of the aircraft engine is controlled to be 11-13 percent.

The invention relates to an interference-prevention-based multi-automatic-guided-vehicle (AVG) path planning method for a logistics storage system. On the basis of analyses of arrival and departure times of multiple AGVs at and from all road sections and nodes in a logistics storage system, driving overlapping frequencies of the AGVs on the road sections and nodes are calculated. With combination of an interference threshold value, a multi-AGV shortest path planning model with an interference prevention constraint is established by using multi-AGV operation time as a target. With a frame of an ant colony algorithm, an interference-prevention-based multi-automatic-guided-vehicle path planning method with inducing ant colony and particle swarm fusion for a logistics storage system is designed by keeping a pheromone factor is kept, removing a visibility factor, and adding a A <*> factor and an inducing factor. Road features of typical logistics storage systems like a dock, a warehouse, a distribution center, a container station and various storage yards are combined and a multi-automatic-guided-vehicle path planning method is provided. Therefore, the interference can be avoided effectively; the AGVs can arrive at destinations according to respective shortest paths; and thus the working efficiency and security of the logistics storage system can be improved.

The invention provides a nonlinear coupling control method for a bridge crane based on generalized movement of a load by aiming at an under-actuated crane system. The nonlinear coupling control method has good trolley positioning and load hunting elimination performances. Compared with an existing crane control method, the method is applicable to not only stabilization control but also trajectory tracking control. The method includes: designing a signal similar to horizontal displacement of the load, and constructing a novel error signal on the basis, so that the coupling relation between a trolley and the load is enhanced. According to the novel nonlinear coupling control method, the crane system is converted into an interconnected system consisting of a load hunting sub-system and an error signal sub-system. The control performance of a closed-loop system is proved by means of inputting the state stability theory and the LaSalle's invariant principle. Experimental results show that good control effects can be obtained by the control method, and the method has good practical application values.

The invention relates to an environmentally-friendly flexible epoxy resin grouting material. The grouting material comprises liquid A and liquid B, wherein the liquid A comprises the following materials in part by weight: 100 parts of epoxy resin and 30 to 120 parts of active diluting agent; the liquid B comprises the following materials in part by weight: 20 to 100 parts of curing agent and 0.5 to 10 parts of accelerator; and the liquid A or the liquid B also comprises 1 to 10 weight parts of silane coupling agent. The epoxy resin grouting material can be used for sealing, preventing seepage of and reinforcing active fissures or joints in building engineering and projects such as hydraulic architectures, bridges, traffic and the like.

The invention discloses a diagonal ore-break-down medium-length hole mining method for a steeply-inclined thin vein ore body. The method comprises the following steps: arranging a stope according to the strike of the ore body, dividing rooms, pillars and sections according to the inclination direction of the ore body and arranging a level haulage roadway along the vein of the ore body from the footwall of the ore body; driving ore-drawing crosscuts into the ore body from where the level haulage roadway is located; horizontally arranging an undercutting roadway along the vein and parallely driving rock-drilling prospecting rises along slant height; arranging ore drop shafts to abut against the haulage roadway; starting stoping from one side of the stope, stopping stoping when the undercutting roadway is driven to the position of the first rock-drilling prospecting rise and then driving the rock-drilling prospecting rise; allowing a medium-length hole drilling machine to gradually travels from undercutting roadway to rock-drilling prospecting rise, drilling medium-length upward blast hole, carrying out denotation and drawing ore out from the bottom ore-drawing crosscuts; and after the first rock-drilling prospecting rise reaches a certain position, continuing driving the undercutting roadway until the position of the second rock-drilling prospecting rise is arrived at, carrying out medium-length hole mining, and repeating the above-mentioned operations until stoping of the stope is completed. The diagonal ore-break-down medium-length hole mining method has the advantages of high production efficiency, great production capacity and good operation security.

The invention discloses an intelligent shoveling bus controlling system of a loader. According to the intelligent shoveling bus controlling system of the loader, a collecting bucket oil port, a movable arm lifting oil port, an overturning bucket oil port, a movable arm descending oil port and a floating oil port of an electric-hydraulic proportional pilot valve are connected with a collecting bucket oil port, a movable arm lifting oil port, an overturning bucket oil port, a movable arm descending oil port and a floating oil port of an electric-hydraulic proportional distribution valve respectively, a second oil inlet of the electric-hydraulic proportional pilot valve is connected with a large cavity of a movable arm oil cylinder, and an overturning bucket cylinder displacement sensor, a movable arm displacement sensor, a shoveling bucket horizontal displacement sensor, a main controller, a descending height setting button, a lifting height setting button, an electric control pilot handle and an engine controller are respectively connected with a bus. The intelligent shoveling bus controlling system of the loader is efficient, saves energy, is small in energy loss, improves the stability and comfort of work of the whole loader, is long in service life, is good in leveling function, avoids accidents, guarantees operation safety, improves operation efficiency, is favorable for upgrading and modification of products, and is used for controlling the shoveling process of the loader.

The invention discloses a new energy automobile charging device with high security protection performance. The charging device comprises a charging pile formed by a propulsion part and a power supply part, and a charging gun. The propulsion part is fixedly arranged in an upper position of the left side of the power supply device. A propulsion sliding groove is arranged in the end face of the bottom end of the propulsion part. A first threaded rod which left-right extends is arranged in the propulsion sliding groove. The left side end of the first threaded rod is connected with a first motor. The right side end of the first threaded rod is in rotatable matched connection with the inner wall of the right side of the propulsion sliding groove. A clamping propulsion block which is in threaded matched connection with the first threaded rod is arranged on the first threaded rod. A push-press rod which extends towards the right side is arranged on the right side end face of the clamping propulsion block under the first threaded rod. A slope push-press head is arranged at the tail end of the right side of the push-press rod. A first sliding cavity which longitudinally extends is arranged in the power supply part. A sink groove is arranged in the inner base wall of the first sliding cavity. The charging device is simple in structure, capable of achieving automatic charging and insertion connection, and capable of automatically controlling exposure and hidden work of a power supply insertion needle, so working efficiency and safety are improved.

A method and an arrangement is provided for determining the location and / or speed of an object configured to move along a controlled trajectory, in connection with which object is fitted a measuring device measuring at least the magnetic field acting on the object in its different locations, which measuring device comprises a device configured to measure the magnetic field, from the measuring data received from which device a magnetic footprint describing the magnetic field acting on the object in its different locations is formed, which magnetic footprint is recorded in connection with a teaching run, or with self-learning, for later use. The location of the object after a teaching run is determined by measuring in essentially real-time in the direction of the three coordinates X, Y, Z of the magnetic field acting on the object moving along a controlled trajectory and by comparing the measurement results to a magnetic footprint recorded in advance and also by deducing as a result of the comparison the exact location of the object on its path of travel.

The invention discloses a transformer cabinet based on self-feedback uniform heat dissipation. The invention belongs to the field of transformer equipment, a special composite heat dissipation sheet can be additionally arranged on a surface of an existing transformer oil tank, matched lifting heat-absorbing balloons are introduced while the heat dissipation of the oil tank is greatly improved, a self-feedback heat dissipation mechanism arranged on the composite heat dissipation sheet is used for sensing the heat distribution condition on the transformer oil tank; phase expansion is carried outaccording to heat distribution; more lifting heat-absorbing balloons are attracted through the magnetic attraction effect to be in contact for heat transfer; the transfer of heat to the lifting heat-absorbing balloons is accelerated; after absorbing enough heat, the lifting heat-absorbing balloons automatically rise to a cup-shaped outer heat dissipation shell to transfer the heat to the outside;the lifting heat-absorbing balloons serve as intermediate media to play a role in temporary heat storage, a heat conduction bridge between the transformer oil tank and the outside is built, the uniform and efficient heat dissipation and cooling of the transformer oil tank are achieved, and, therefore, the working stability and safety of a transformer are improved.

The invention provides an electrode current collector material of a lithium ion battery and a method for preparing the material. The method comprises the following steps of: coating a carbon layer on the surface of a copper foil or an aluminum foil, wherein the thickness of the coated carbon layer is 0.003-0.015mm; and depositing the carbon layer on the surface of the copper foil or the aluminum foil by utilizing a physical vapor deposition method, and then carrying out thermal treatment. While ensuring the conductive property of the material as a current collector, the material improves the chemical property of easy oxidization of the foil in the working process of the battery, enhances the corrosion resisting property of the foil, and can effectively prevent a metal dendritic crystal produced by the lithium ion battery in the working process due to reaction, increase the safety performance of the battery, reduce the internal resistance of the battery and effectively prolong the service life of the battery. The process has the advantages of low temperature, less distortion and damage on the material, low energy consumption, less pollution and lower cost.

The invention discloses a railway station internal and external work control system, which comprises a railway station transport information subsystem, a dispatching exchange, a base station and external work handhold devices, wherein the railway station transport information subsystem is connected with the dispatching exchange in a wired mode; the dispatching exchange is connected with the base station in a wired mode; and the base station is connected with the external work handhold devices in a wireless mode. The railway station transport information subsystem makes operation plans for trains, announces the plans in advance, sends the plans to the external work handhold devices, controls the job processing of external workers according to feedback information received from the external work handhold devices and ensures that all external work handhold devices complete train operation according to dispatching regulations; the dispatching exchange and the base station serve as the transfer stations between the railway station transport information subsystem and the external work handhold devices; and the external work handhold devices execute operation according to the operation plans of the trains, and report operation processing information. When the system is used, the operation efficiency and safety can be improved.

The invention relates to an emergency wireless toxic gas detector for chemical leakage accident, which belongs to a field of safe production monitoring and emergency rescue technology. The detector comprises a wind direction and wind speed sensor, at least one toxic gas sensor and an amplification circuit thereof, a single-chip and a peripheral circuit thereof, a GPS module, a wireless sending module and an antenna thereof, an ID setting switch, a power supply, and a power switching circuit. The output terminal of each toxic gas sensor is connected with the input terminal of amplifying circuit thereof, the output terminal of each amplifying circuit is connected with an AD switching interface of the single-chip, wind speed and wind direction output ports of the wind direction and wind speed sensor are respectively connected with the single-chop, the GPS module, the wireless sending module and the power switching circuit are respectively connected with the single chip, and the power supply is connected with the power switching circuit. The invention can detect wind direction and wind speed, and concentration of multiple toxic gases in emergency rescue field of the chemical leakage accident, and send the detected result timely to remote end emergency command center so as to guarantee public life and property safety.

The invention relates to an anti-drop device of a machine roomless car roof repairing platform. A lift car is fixed with vertical beams arranged on both sides of the lift car, a slideway is arranged outside the vertical beams, in the anti-drop device, a permanent seat is fixed on the inside of the vertical beams; a anti-drop frame is fixed on the vertical beams and the permanent seat, through-holes are arranged opposite to each other on the two corresponding end faces, an electrical switch is arranged inside the end faces; a fixed plate is fixed on the outside of the slideway, a location hole is arranged on the fixed plate; a spring is sleeved on a fixed rod, a raised panel capable of triggering the electrical switch is arranged on the fixed rod, the other end of the raised panel is provided with a jack for a bolt to penetrate; the fixed rod successively penetrates the two through-holes of the anti-drop frame and the location hole on the fixed plate from inside to outside, the raised panel contacts with the electrical switch, and the outside of the fixed plate is positioned by the bolt. The anti-drop device of the invention has the advantage that double functions of the mechanical orientation and the electric control are adopted so as to increase the work security; the clamping type fixed plate is used so that workers can stand in a safe position; and the spring is used to push the fixed rod back so as to avoid the danger caused by the carelessness of manual reset.

The invention discloses a signalized intersection non-motor vehicle lane channelizing control method under expansion effect. The method includes the following steps: step 10), utilizing a video detector for data collection; step 20), extracting data; step 30), building a vehicle traveling simulation module; step 40), simulating expansion effect; step 50), performing non-motor vehicle lane channelizing control. By the method, interference caused to street crossing of motor vehicles by non-motor vehicles can be lowered, street crossing delay of the motor vehicles can be reduced, and running efficiency of a signalized intersection can be improved.

The invention provides an upper upright column turnover device and method for a marine crane. The upper upright column turnover device comprises two turnover parts and a turnover support, wherein the turnover parts are symmetrically mounted on two sides at the tail part of an upper upright column and each turnover part comprises a rotating shaft; the turnover support comprises a base and two vertical plates, the vertical plates are perpendicularly fixed on the base and notches are formed in the upper ends of the vertical plates; the two rotating shafts of the two turnover parts are correspondingly inserted into the notches, so that the upper upright column can rotate around the turnover support. The method for turning over the upper upright column by using the upper upright column turnover device comprises the following steps: step 1) fixing the turnover support on a platform, and lifting the upper upright column which is horizontally placed onto the turnover support by a lifter to enable the rotating shafts to correspond to the notches of the vertical plates; step 2) enabling the upper upright column to rotate around the rotating shafts by the lifter till the upper upright column is nearly upright; step 3) detaching the upper upright column from the turnover support and vertically hoisting the upper upright column; step 4) moving the lifter to mount the upper upright column onto the base.

The invention discloses an artificial intelligence visitor management system with a license plate recognition function. The artificial intelligence visitor management system comprises an intelligent terminal, an outer network server, an inner network server, door control equipment, vehicle management equipment and payment equipment. Visitors can access the outer network server via the intelligentterminal, the vehicle management equipment comprises a license plate recognition camera, a vehicle access manager and a channel gate machine, vehicle information captured by the license plate recognition camera is compared to license plate information in databases of the inner network server by the vehicle access manager, the vehicle information can be captured by the license plate recognition camera and is compared to the license plate information in the databases of the inner network server, and comparison includes comparing license plate images captured by the license plate recognition camera to license plate numbers in the databases of the inner network server after image recognition is carried out on the license plate images, comparing vehicle types and comparing vehicle colors.