145results about How to "Extended working hours" patented technology

The invention provides an unmanned aerial vehicle multi-target tracking method and system based on visual and millimeter-wave radar information fusion, and the method comprises the steps: obtaining an association result through employing a space-time consistency model, constructing a self-adaptive joint probability data association frame according to the association result, so as to obtain an initial target state estimation value, and carrying out the recognition of the initial target state estimation value. A prospective path planning algorithm is adopted to obtain an optimal observation angle flight path, a Bayesian network is utilized to obtain initial observation data, based on the initial observation data, an optimal target state estimation value is generated, a distributed cooperative sensing mechanism is used to generate an initial tracking task allocation scheme, and an intelligent resource allocation strategy is implemented. Generating an initial resource allocation scheme, starting a quick response protocol to obtain an optimal tracking task allocation scheme, and generating an optimal resource allocation scheme based on the optimal tracking task allocation scheme; according to the technical scheme provided by the invention, the accuracy of target identification is improved, the environmental adaptability is enhanced, the tracking efficiency is improved, and the working time is prolonged.

The invention discloses a three-dimensional reconstruction method based on an unmanned aerial vehicle and edge calculation, and relates to the field of unmanned aerial vehicle technology, edge calculation and three-dimensional scene reconstruction. The method comprises the following steps: an unmanned aerial vehicle carries a monocular camera to collect a standard-definition video stream from a target scene; the edge computing device receives and processes the standard-definition video stream in real time to generate preliminary low-precision three-dimensional reconstruction; the edge computing device identifies a defect area by analyzing a low-precision reconstruction result, and optimizes the flight path of the unmanned aerial vehicle; the unmanned aerial vehicle collects a high-definition video stream from the target scene according to the optimized path; and the edge computing device performs off-line high-precision three-dimensional reconstruction on the high-definition video stream so as to improve the accuracy and detail expression capability of a reconstructed scene. Through cooperative work of the unmanned aerial vehicle and the edge calculation end, real-time data processing, feedback and decision making in the collection process and high-precision three-dimensional reconstruction result storage in the off-line stage are achieved, and the real-time performance and accuracy of three-dimensional reconstruction are effectively improved.

The invention discloses an underwater robot self-adaptive control system and method based on data analysis, and relates to the technical field of automatic control. Environment data and underwater robot data in the operation process of an underwater robot are collected, an operation data set S is constructed, feature extraction is performed, and the operation data set S is obtained; the method comprises the following steps: acquiring an acceleration fluctuation coefficient # imgabs0 # and an attitude angular rate fluctuation coefficient # imgabs1 #, summarizing and calculating to obtain a stability score WD, evaluating the operation state of the underwater robot, predicting water flow data at a future time point t + k when the operation state of the underwater robot is abnormal, acquiring an underwater robot adjustment thrust # imgabs2 # in combination with a robot dynamic model, and using a genetic algorithm to calculate the operation state of the underwater robot. According to the method, the optimal thrust distribution scheme of the underwater robot is obtained, the underwater robot is controlled to execute the operation task, strong turbulence and water flow reversing can be effectively handled, the operation failure and damage risk of the underwater robot are reduced, and the operation stability and safety of the underwater robot are improved.

The invention discloses a self-adaptive high-energy laser module, a forcible entry device and a forcible entry method. The self-adaptive high-energy laser module comprises a shell, and a first power supply assembly, a first controller assembly, a power-adjustable laser assembly, a first photoelectric detection assembly, a second photoelectric detection assembly and a focal length adjusting assembly are arranged in the shell; according to the invention, operation conditions such as the distance and the material of the to-be-broken target object can be automatically detected, the distance between the breaking device and the target object can automatically adjust the focusing position of the high-energy laser beam, and the output high-energy laser power can be automatically adjusted according to the material attribute of the target object on the breaking operation site; according to the method and the system, diversified field requirements of the forcible entry operation are met, meanwhile, the preparation process is simplified, the procedure link of manually setting parameters in the forcible entry operation field is avoided, the error probability is reduced, the capability of dealing with emergencies is enhanced, and the forcible entry task is more effectively completed without excessively damaging a target or causing unnecessary risks.

The utility model belongs to the technical field of gear machining, and particularly relates to a gear chamfering device which comprises a supporting shell, a driving shaft and a hydraulic telescopic rod, the inner wall of the supporting shell is rotatably connected with a rotating column, the side wall of the rotating column is slidably connected with a plurality of supporting carrying plates, the inner walls of the supporting carrying plates are rotatably connected with connecting shafts, and the connecting shafts are connected with the hydraulic telescopic rod. The top end of the driving shaft is fixedly connected with a bevel gear, the bottom end of the connecting shaft is provided with a conical meshing tooth groove, and the output end of the hydraulic telescopic rod is rotationally connected with a rotary pressing disc; the connecting shaft located on the outer side of the supporting shell is in the non-working state, so that a worker or a mechanical arm can replace the connecting shaft in the non-working state, and when a next gear is chamfered, the next gear can reach a machining area to be chamfered only by controlling the rotating column to rotate; the actual working time of the cutting tool of the chamfering machine is prolonged, the working pause interval time is shortened, and therefore the machining efficiency of the chamfering machine is improved.

This application belongs to the technical field of air compressor safety, and particularly relates to a safety operation method for a piston air compressor. A safety operation method for a piston air compressor includes the following steps: S1, a flexible baffle is provided on an air-cooled plate cooler connected to the piston air compressor; S2, temperature data of each cooling unit at the current moment is obtained, and at the same time, the temperature change trend and the opening area change trend of the air outlet end of each cooling unit are obtained; S3, according to the pressure dew point temperature of the air outlet end of each cooling unit at the current moment, the opening area of each cooling unit at the current moment is adjusted to change the coverage degree of the flexible baffle on the air-cooled flow channels of each cooling unit at the next moment, so that the temperature of the air outlet end of each cooling unit is always above the corresponding pressure dew point temperature. This application can尽量避免活塞式空压机在运行的过程中发生冰堵或油乳化,保证活塞式空压机的安全运行。 It should be noted that there is an unclear part in the original Chinese text "尽量避免活塞式空压机在运行的过程中发生冰堵或油乳化,保证活塞式空压机的安全运行。" which may need to be further clarified for a more accurate translation. The above translation is based on the best understanding of the current text.

The invention provides an underwater vehicle charging system and a charging method, and solves the problem that the loading capacity, the operation time and the operation flexibility of an underwater vehicle are affected as a heavy coupler needs to be carried at the vehicle end in the conventional underwater vehicle wireless charging system. According to the invention, the permanent magnet synchronous motor which must be carried by the underwater vehicle is used for energy supply, the battery of the underwater vehicle is directly charged through the electromotive force generated by the reverse rotation of the permanent magnet synchronous motor, and the situation that the load is increased by a coupler installed at the vehicle end in the conventional wireless charging process is avoided. The charging system comprises a charging device arranged underwater and a one-way clutch arranged between a transmission shaft of a permanent magnet synchronous motor of the underwater vehicle and a propeller. The charging device comprises a base platform, a mobile platform, a motor, a charging rod, a fixed electromagnet, a communication unit and a control unit. The motor converts electric energy obtained by the charging device into mechanical energy which is transmitted to the permanent magnet synchronous motor transmission shaft through the charging rod to drive the transmission shaft to rotate reversely.

The invention relates to the technical field of sewage treatment equipment, and particularly discloses graded sewage treatment equipment for ecological restoration of a water area, the graded sewage treatment equipment comprises an outer frame body, the outer frame body is tubular, the outer surface of the top of the outer frame body is fixedly connected with a mounting frame, and the top of the mounting frame is arranged above the outer frame body. In the filtering process, a motor is started to drive a rotating rod to rotate, and meanwhile, a rotating ring is driven to rotate through a connecting frame, so that a poke rod on the rotating rod rotates along with the rotating rod, and sewage preliminarily entering a filtering frame is poked; untreated sewage containing a large amount of impurities is prevented from precipitating in the filtering frame to block the filtering frame and reduce the filtering effect, meanwhile, when a motor is started, a filtering plate can be driven to move on the upper surface of a filtering ring, a cavity between the filtering frame and the outer frame body is stirred through the filtering plate, the impurities passing through the filtering frame are prevented from blocking the filtering ring, and the filtering effect is improved. The filtering effect is further improved, and the filtering fluency is improved.

The invention discloses a miniaturized optical fiber strapdown inertial navigation system based on a three-axis integrated vibrating beam accelerometer, which comprises an inertial measurement unit and an outer cover assembly, the inertial measurement unit is arranged in the outer cover assembly, and the inertial measurement unit is at least used for completing measurement and navigation calculation of inertial motion parameters of a carrier. The outer cover assembly is at least used for avoiding the influence of the external environment on the inertial measurement unit and ensuring the normal work of the inertial measurement unit. According to the optical fiber strapdown inertial navigation system provided by the invention, on the premise of not high requirements on horizontal attitude and autonomous positioning precision, indexes such as equipment volume, weight and power consumption are further reduced by replacing a small-volume accelerometer and optimizing the structural size, so that the burden of carriers such as airplanes and unmanned aerial vehicles can be reduced, and the operation efficiency and maneuverability of the carriers can be improved; and the platform can be applied to some small or micro aircrafts and ground machines with limited space, and the application friendliness and the user experience of the platform are enhanced.

The utility model belongs to the technical field of unmanned aerial vehicles, and particularly relates to a cleaning unmanned aerial vehicle and a cleaning device.The cleaning unmanned aerial vehicle comprises a vehicle body, a plurality of propellers are arranged on the vehicle body, one propeller is arranged at the front end of the vehicle body, an underframe is arranged at the bottom of the vehicle body, a storage battery is installed on the vehicle body, and a spraying mechanism is arranged below the vehicle body; the spraying mechanism is provided with a water inlet connector and a water outlet connector, an anti-collision mechanism is installed at the front end of the machine body and located in front of a propeller at the front end of the machine body, an operated object can be effectively prevented from colliding with the propeller through the anti-collision mechanism, and the operated object is effectively and continuously cleaned through the spraying device; water can be continuously supplied, the operation time is longer due to the fact that a water tank is not carried, a water spraying pipe can be quickly replaced through a quick-release head on the spraying mechanism, and therefore the cleaning device can quickly adapt to cleaning work of different objects and is convenient to use.

The utility model discloses a polishing belt sander, and relates to the technical field of polishing belt sanders. The polishing device comprises a workbench, a side plate is arranged on the rear side of the top of the workbench, a polishing machine is arranged on the front side of the side plate, a belt is arranged in the polishing machine, an upper movable block and a lower movable block which are symmetrical are arranged in the belt, and a threaded hole and a through hole are formed in the left side and the right side of the interior of each movable block respectively. And a loosening assembly with a lifting function is arranged in the side plate. The loosening assembly drives the movable block to move upwards and downwards respectively till the upper end enables the belt to be located in the containing groove, the belt loses tension through stretching of the movable block, and then the belt can be taken out and replaced with a new belt. The problems that a grinding wheel or a driving motor needs to be detached from the machining position of a machine tool for replacement of a belt, the working time is prolonged, and the production efficiency is reduced are solved, a cleaning assembly is driven to clean dust on the top of a transmission mechanism, and the dust is prevented from falling into the belt.

The utility model relates to a quick replacement device for a core rod support frame, which comprises a roll replacement transverse moving structure, a roll replacement transverse moving structure and a roll replacement transverse moving structure, wherein the roll replacement transverse moving structure comprises a first roll replacement transverse moving vehicle and a second roll replacement transverse moving vehicle; the rack pulling-out and pushing-in device is used for pulling out or pushing the core rod supporting frame into a rail in the rolling mill and is arranged on one side, far away from a rolling center of the rolling mill, of the first roll changing transverse moving vehicle or / and the second roll changing transverse moving vehicle; and the transition rack structure and the roller rack are arranged in a staggered mode in the axial direction of the roller, and the rack pull-out and push-in device drives the core rod supporting frame to move along the roller changing transverse moving structure, the transition rack structure and the rolling mill inner rail. The utility model solves the problem that the mandrel support frame can not be quickly replaced, the preparatory work required by the replacement of the mandrel support frame can be carried out during the working period of the rolling mill, the replacement of the mandrel support frame can be completed during the replacement period of the roller rack, the rack replacement time is shortened, the downtime of the rolling mill is reduced, and the production efficiency is improved. And the rack replacement efficiency and the production efficiency are improved.

The invention discloses container shell welding equipment for chemical pressure container machining, and relates to the technical field of shell welding, and the container shell welding equipment comprises a composite mechanism. According to the container shell welding equipment for chemical pressure container machining, through the design of a composite mechanism, the telescopic rod is used for controlling the welding frame to conduct lifting operation, so that welding materials can be attached conveniently, the application range is expanded, and the operation efficiency is improved; and when the telescopic rod controls the welding frame to ascend and descend, the protection mechanism is attached to the top of the material, so that the effect of presetting a welding spot is achieved, deviation during welding is prevented, the welding quality is improved, and the welding efficiency is improved. Materials are welded in a mechanical rotating mode, and normal operation of material welding is guaranteed.

The application relates to the technical field of flue gas waste heat recovery, and discloses a rotary kiln flue gas low-temperature waste heat recovery device, which comprises a primary recovery chamber, a secondary recovery chamber and a water storage tank, a flue gas inlet pipe is fixedly installed at the left end of the outer wall of the primary recovery chamber, a flue gas connecting pipe one is fixedly installed at the right side of the upper end of the outer wall of the primary recovery chamber, the rear end of the outer wall of the flue gas connecting pipe one is fixedly connected with the front end of the outer wall of the secondary recovery chamber, the temperature of the heat-conducting aluminum sheet one directly contacting the outer wall of the S-shaped flue pipe is increased, the hot end of the thermoelectric sheet can have a constant high temperature, the heat-conducting aluminum sheet two contacting the inner wall of the water pipe one can take away the heat at the heat-conducting aluminum sheet two under the action of the water flowing in the water pipe one, and the cold end is formed, so that a temperature difference is formed between the hot end and the cold end of the thermoelectric sheet, the thermoelectric sheet can generate electricity by utilizing the temperature difference between the high and low temperatures, and the heat energy in the flue gas can be converted into electric energy.

The present invention discloses a bridge inspection vehicle and a transport platform system, comprising: a vehicle body, a plurality of running wheel groups on both sides of the bottom width direction of the vehicle body, the plurality of running wheel groups being connected to a power system, a first grasping device and a second grasping device being sequentially arranged in the length direction of the upper portion of the vehicle body, the first grasping device and the second grasping device having the same structure, the first grasping device and the second grasping device grasping a suspension rod simultaneously or alternately, the bottom of the suspension rod being connected to an inspection platform, so as to solve the technical problems in the prior art of inaccurate positioning of drone inspection, the influence of magnetic field and stray wind, and the inability of truss-type or hanging basket-type inspection vehicles to extend their inspection arms to special structure bridges for inspection.

The application discloses an electric tool, comprising: a motor comprising a rotor and a multi-phase stator winding; the driving circuit is electrically connected with a stator winding of the motor and comprises at least one switch element; the electric tool further comprises a first circuit board and a second circuit board, wherein at least one switch element is arranged on the first circuit board; and the Hall current sensor is used for detecting the current of the driving circuit, and the Hall current sensor is arranged outside the first circuit board. By the adoption of the technical scheme, the electric tool can be provided, and the continuous working performance is high.

A high-altitude spraying device for a steel structure building comprises a control center base, a first base and a second base, a control terminal is installed in the center base, a spraying component is installed on the side, away from a working face, of the center base, a cavity is formed in the center base, and a first telescopic rod is arranged in the cavity in a matched mode; the center base is movably connected with the first base and the second base through the first telescopic rod, grooves are formed in the sides, close to the working face, of the center base, the first base and the second base, supporting plates are arranged in the grooves, electromagnets are installed on the sides, close to the working face, of the supporting plates, and the other sides of the supporting plates are connected with one ends of springs. The other end of the spring is connected with the inner surface of the groove away from the working surface; the device can be stabilized and moved on the surface of the steel structure without additional auxiliary parts through the cooperation of alternate on-off of the electromagnets and the telescopic rods, use is simpler and faster, and compared with traditional manual spraying operation, the construction efficiency is higher, and the construction effect is better.

The application provides an image generation unit and a head-up display system, relates to the technical field of display, and comprises a light source, a first polarization element, a liquid crystal display screen and a second polarization element; the light source is configured to emit an initial light beam; the first polarization element is located on a propagation path of the initial light beam and is configured to generate a first polarized light beam; the liquid crystal display screen is arranged at intervals with the first polarization element in a light propagation direction and is located on a propagation path of the first polarized light beam; a first air gap is formed between the liquid crystal display screen and the first polarization element; and a second air gap is formed between the liquid crystal display screen and the second polarization element; in the technical scheme, external light that flows in reversely and heat absorbed by the light source are all concentrated on the polarization plate, and the liquid crystal display screen is not bonded, so that the risk of screen burn-in of the display screen can be reduced.

The present application relates to the field of aerospace technology, in particular to a kind of spacecraft autonomous control system, including autonomous navigation and return module, autonomous docking module and close-range autonomous rendezvous docking module, by setting autonomous navigation and return module, autonomous docking module and close-range autonomous rendezvous docking module, to realize the full-automatic intelligent navigation of spacecraft in the process of space flight and the autonomous docking of spacecraft and space station, further not need manual intervention, by the autonomous control of spacecraft in the process of space flight, to greatly shorten the working time of astronauts in the small space of spacecraft, improve the work efficiency of astronauts, further solve the technical problems that the control system of existing spacecraft cannot realize automatic control, need manual intervention, to increase the working time of astronauts in the small space of spacecraft, reduce the work efficiency of astronauts.

The invention relates to a regional energy conveying split type heat pump unit which comprises a supporting seat, a protective cover is fixedly installed at the top of the supporting seat, a support is arranged in the protective cover, a compressor is fixedly installed at the top of the support, an evaporator and a heat supply mechanism are arranged on the two sides of the support respectively, and the input end of the compressor communicates with the output end of the evaporator; the extending end of the first air cylinder is in the longest state, the first piston blocks the output end of the connecting pipe, a cleaning agent is injected into the heat exchange box, the cleaning agent and clear water in the heat exchange box are mixed into cleaning liquid, the first heat exchange pipe and the second heat exchange pipe are soaked, and a small amount of scale on the surface of the second heat exchange pipe can be conveniently removed; and then the extending end of the second air cylinder is controlled to contract to the half length, a through hole is blocked through a first sealing plug, then a cleaning agent and clear water are injected into the heat exchange box, cleaning liquid with the higher concentration is obtained, the first heat exchange pipe is soaked, and thick scale on the surface of the first heat exchange pipe is soaked twice, so that the thick scale is conveniently and efficiently removed.

The invention provides a secure communication method and system for a low-power-consumption wireless network. And a global message sending cache set mechanism is provided, and the gateway can manage the messages which are not received, so that the data cannot be lost due to node dormancy. In combination with a timed task mechanism, the gateway can retransmit messages in a moderated manner at preset wake-up time or other appropriate time of the wireless nodes, so that the situation that the network load is increased due to too frequent retransmission, and then the performance of the whole system is affected is avoided; a key management system is introduced, and a gateway is responsible for applying and distributing working keys of wireless nodes in a unified manner. And the gateway obtains the working key which needs to be used at present through communication with the key management system, and distributes the working key to each node. The problem that the calculation amount is too large when the wireless node carries out asymmetric key negotiation is solved, the key management process of the node can be simplified, and the calculation and communication burden of the node is reduced; in order to prevent communication abnormity caused by secret key mismatching between the wireless node and the gateway, a secret key proofreading mechanism is designed in the process that the wireless node applies for a working secret key. The mechanism ensures that an encrypted communication link established between the node and the gateway is encrypted and decrypted using the correct key.

The invention provides a water injection pump leakage pressure detection and control device based on industrial vision. The device comprises an industrial visual pressure detection module and a PLC control module. The image source module is used for setting shooting basic parameters and shooting leaked water of the water injection pump in real time; the rapid matching module establishes a corresponding picture template when water leaked by the water injection pump is a water drop or a water column; the condition detection module detects whether each picture obtained by photographing is matched with a picture template or not; a first variable calculation module counts the total number N of pictures shot in real time within a period of time; the first variable calculation module counts the number NOK matched with the picture templates; the second variable calculation module calculates the number NNG which is not matched with the picture templates and the qualified rate R which is matched with the picture templates; the consumed time statistics module counts total consumed time T; a third variable calculation module calculates the qualified rate R1 in unit time; and when the qualification rate R1 is within a preset range, the PLC control module controls the water injection pump to continuously operate, and otherwise, the PLC control module controls the water injection pump to stop operating. The technical blank of pressure detection of the leakage rate of the water injection pump in a non-contact mode is filled.

The invention discloses a steel-concrete composite beam sliding construction device and method, and relates to the technical field of sliding construction device.The steel-concrete composite beam sliding construction device comprises a connecting box, a mounting mechanism is arranged in front of the connecting box, a dismounting mechanism is arranged above the connecting box, the mounting mechanism comprises a triggering unit, and the triggering unit is arranged in front of the connecting box; the trigger unit can drive the device to extend into a mounting hole formed in the composite beam in advance, the mounting mechanism further comprises a locking unit, the locking unit is arranged in front of the connecting box, the locking unit is matched with the trigger unit, the locking unit can lock and limit the device and the composite beam, and the dismounting mechanism is matched with the mounting mechanism. According to the steel-concrete composite beam sliding construction device, by arranging the triggering unit, the locking unit and the dismounting mechanism, the situation that in the using process of the device, a connecting box can be installed on a composite beam only with the help of tools and bolts, the working time of workers in a narrow space can be prolonged, and meanwhile the falling risk of the workers is increased can be effectively avoided.

The invention relates to a double-propellant configuration barrel rocket gun, in particular to a smoothbore barrel rocket gun using a double-propellant configuration rocket projectile, and aims to solve the problem that a large-power weapon is long in barrel and large in dead weight due to the fact that killing power of a traditional light weapon and a medium and small caliber gun is limited by barrel bore pressure at present. And the practical requirements that the weapon hit precision is superior to or at least not lower than that of an existing traditional barrel gun and the weapon and ammunition cost does not exceed that of the existing traditional barrel gun can be met. The main technical advantages of the invention are concentrated in the field of medium-and-small-caliber and limited-range direct aiming gun and gun weapons, and can be applied to infantry light weapons, such as pistols (individual self-defense weapons), submachine guns, automatic rifles, sniper rifles and light and heavy machine guns, and medium-and-small-caliber direct aiming artillery, such as tank cannons, antitank cannons, air defense cannons and aviation machine cannons.

The application provides a wide-area infrared point target detection tracking cooperative satellite system, which comprises a camera subsystem, a target processing subsystem, a task planning subsystem, an intersatellite network subsystem, an imaging quality guarantee subsystem and a light shield subsystem; the camera subsystem is used for imaging infrared point targets in a wide-area range to generate a wide-area monitoring range image containing weak infrared radiation targets; the target processing subsystem extracts two-dimensional plane coordinates of the targets from the infrared image, generates three-dimensional positions and speeds of the targets, and reasonably distributes different targets to different satellites for data fusion; the task planning subsystem calculates orbit positions and observation capabilities of other cooperative satellites according to the three-dimensional positions of the targets, and performs observation task planning on the other cooperative satellites; the intersatellite network subsystem is responsible for receiving two-dimensional angular trajectories provided by other satellites, providing the two-dimensional angular trajectories to the target processing subsystem, and sending information such as cooperative planning generated by the task planning subsystem to other satellites.

The invention relates to the field of building outer wall repairing, in particular to infrared detection and repairing equipment for leakage and hollowing of a building outer wall. Infrared detection and repair equipment for leakage and hollowing of a building outer wall comprises an unmanned aerial vehicle, an infrared detection device is installed on a cradle head of the unmanned aerial vehicle, the infrared detection device is provided with a camera, a plurality of fixing pipes are arranged on a rack of the unmanned aerial vehicle, and a plurality of adsorption mechanisms are jointly installed on all the fixing pipes; the fine adjustment mechanism is mounted on the rack; the repairing mechanism is mounted on the fine adjustment mechanism; and the conveying mechanism is mounted on the rack. The space between the suction cups and the tile wall surface is vacuumized through the fixing pipes and the mounting pipes, the multiple suction cups are adsorbed and fixed to the tile wall surface, meanwhile, the air pressure is monitored through the air pressure sensor, the suction and fixing effect of the suction cups is ensured, the unmanned aerial vehicle can stop working, and on one hand, the electric quantity of the unmanned aerial vehicle can be saved; on the other hand, the whole equipment is fixed on the wall surface to work, the paving accuracy is guaranteed, meanwhile, the safety problem caused by accidental collision of the unmanned aerial vehicle on the wall surface due to uncontrollable factors in hovering work is avoided, and manual maintenance is not needed after detection.

The invention relates to an elevator hydraulic station automatic oiling and low liquid level alarm device which comprises a hydraulic station oil tank and a centralized gas station, an oil pump is arranged at the centralized gas station and communicated with the hydraulic station oil tank through a pipeline, and a transparent oil window is arranged on one side of the hydraulic station oil tank and communicated with the hydraulic station oil tank through a pipeline. The automatic oiling and low-liquid-level alarm device comprises a transparent oil window, a first liquid level sensor and a second liquid level sensor are installed on the transparent oil window, the first liquid level sensor is arranged above the second liquid level sensor, and the automatic oiling and low-liquid-level alarm device of the elevator hydraulic station further comprises a controller. The controller is electrically connected with the first liquid level sensor, the second liquid level sensor and the oil pump. Therefore, the automatic oiling function of the device can ensure that the hydraulic station is always kept at a proper oil level, and abrasion caused by poor lubrication of hydraulic components due to insufficient oil is avoided. Normal operation of the hydraulic station can be guaranteed, oil waste can be prevented, and the resource utilization efficiency is improved.

A crater device for preventing evaporation source pollution comprises a crucible assembly, the crucible assembly comprises a rotating table and a plurality of crucibles arranged above the rotating table, metal sources are placed in the crucibles, and the rotating table drives the crucibles to rotate around the central axes of the crucibles; the crater assembly comprises a rotating disc and a rotating shaft for driving the rotating disc to rotate, and the rotating disc comprises a plurality of craters corresponding to the crucibles; when the crucible rotates, the rotating shaft drives the rotating disc to rotate at a preset angle, and the crater is rotated to the position above the corresponding crucible. The device is suitable for single-layer and multi-layer metal film evaporation, the multiple craters corresponding to the metal sources in the crucibles are formed in the rotating disc, the rotating disc rotates at the preset angle while the crucibles rotate, the craters with the corresponding numbers are rotated to the positions above the corresponding crucibles, metal source pollution is avoided, and meanwhile the production efficiency is improved.

The invention belongs to the technical field of manipulators, and particularly relates to a visual positioning device for manipulators, which comprises a main mechanical arm, the top end of the main mechanical arm is rotatably connected with a monitoring mechanical arm, the front end of the monitoring mechanical arm is rotatably connected with a mechanical arm force arm, and a mechanical claw can be additionally arranged at the front end of the mechanical arm force arm. The monitoring mechanical arm comprises a hollow adapter plate, front end sleeves are symmetrically arranged on the front portion of the outer surface of the hollow adapter plate, a monitoring assembly is arranged at the axis position of the lower surface of the hollow adapter plate, and inner sealing parts are arranged in inner cavities of the front end sleeves. When the protective barrel shell is replaced, the protective barrel shell needs to be taken down from the outside of the scanning camera, at the moment, the scanning camera loses the protection effect and is exposed in the external environment, a layer of front end sleeve is further arranged outside, when the protective barrel shell is replaced, the penetrating window can be sealed, and a layer of protective shell surrounds the outside of the scanning camera; and the problem that the outer surface of the scanning camera is easy to pollute at the moment is prevented.