722 results about "Air current" patented technology

The invention discloses a numerical simulation prediction method and system for typhoon binocular wall structure reconstruction judgment and maintenance duration after terrain interference and a medium, and relates to the technical field of typhoon fine structure evolution description and numerical simulation. According to the method, the binocular wall typhoon is identified through multi-source data fusion, a high-resolution numerical simulation system is constructed, and a typhoon structure is divided into four quadrants for differential diagnosis according to the wind shear direction based on vertical wind shear phase limit analysis. And the distribution characteristics of the rapid vortex silking area are captured by calculating vortex silking time parameters. And establishing a ditch sinking airflow detection mechanism, and quantitatively evaluating the contribution of radial advection, tangential advection, vertical advection and friction force items to tangential wind evolution by using tangential wind income and expenditure diagnostic analysis. And calculating an energy growth rate, and predicting a double-eye wall maintaining time length. According to the method, the outer eye wall re-formation judgment is output, the outer eye wall radius zone, the maintenance duration interval and the uncertainty are predicted, and the method is suitable for real-time business and research.

The invention relates to the technical field of building environment temperature control, and discloses a temperature control equipment intelligent adjusting method and system based on machine learning, and the method comprises the steps: building a space thermal field sensing network, obtaining multi-dimensional temperature field data, and generating a temperature gradient distribution matrix; and the positions of cold and hot spots are calibrated by combining infrared temperature measurement data, an airflow path is predicted, and air supply parameters are optimized. Meanwhile, building heat capacity characteristics are analyzed, and a thermal response dynamic model is constructed. And the air supply direction is adjusted for the local supercooling area. And based on the temperature change rate and the air supply parameters, the equipment start-stop time is optimized. Through real-time temperature sampling, continuous updating of temperature gradient distribution, cyclic execution of cold and hot spot calibration, airflow prediction and air supply optimization, accurate control of space temperature is realized. According to the invention, the accuracy and energy efficiency of building space temperature adjustment can be obviously improved, and an innovative solution is provided for an intelligent temperature control system.

The embodiment of the utility model belongs to the technology of storage equipment, and provides a storage box which comprises a box body, an airflow circulation assembly and an adjusting assembly, the airflow circulation assembly is provided with a first channel, a second channel and an air mixing channel, and the air mixing channel communicates with an output port of the first channel and an output port of the second channel; the air flow circulation assembly comprises a decorative plate, and the decorative plate is provided with an air outlet communicating with the upper portion of the storage cavity and an output port of the air mixing channel, a first air return port communicating with the lower portion of the storage cavity and an input port of the first channel, and a second air return port communicating with the lower portion of the storage cavity and an input port of the second channel; the first return air inlet and the second return air inlet are respectively communicated with different positions of the lower part of the storage cavity. According to the storage box provided by the embodiment of the invention, in airflow circulation between the storage cavity and the airflow circulation assembly, airflow entering and outputting do not conflict, airflow short circuit is avoided, the airflow flowing speed is increased, the airflow temperature and humidity changing speed is increased, and the rapid adjustment requirement of a customer is met.

The invention discloses a multi-agent cooperative control system based on adaptive learning, and belongs to the technical field of multi-agent system control, and the system specifically comprises the steps: collecting and analyzing the wind field data of the position of each agent; distinguishing two typical working conditions of a global uniform wind field and a local disturbance wind field based on a consistency analysis result; for a global uniform wind field, a model prediction control method is adopted to generate a wind field compensation strategy for keeping formation stability; for a local disturbance wind field, an accurate airflow disturbance state is obtained through environment three-dimensional reconstruction and fluid simulation, then the expected track deviation of each agent is predicted, and a collaborative avoidance instruction set is generated in combination with a relative position relationship. According to the method, adaptive cooperative control of multiple agents under different wind field working conditions is realized, the hidden conflict problem caused by local wind field disturbance is effectively solved, and the flight safety and task reliability of an agent cluster in a complex environment are remarkably improved.

The invention discloses an L-shaped wind wave flow-earthquake simulation system and method suitable for a high gravity field, the simulation system comprises a model box, a wind generation system, an L-shaped wave generation system, a flow generation system and a vibration seabed model, and the model box is used for accommodating and installing each system and is arranged on a rotating arm of a centrifugal machine in an up-and-down swinging manner; the wind generation system is used for forming horizontal airflow circulation, the L-shaped wave generation system is used for generating waves, the flow generation system is used for generating flow, and the vibration seabed model is used for researching interaction between a maritime work structure and seabed soil under various sea conditions. The simulation system can reproduce sea wind, wave, ocean current and earthquake scenes in a high gravity field.

The invention relates to an airflow jet heat dissipation, dehumidification and dust removal system of a power device, and belongs to the technical field of power supply and distribution. Comprising an electric power device and a protection box body of the electric power device, the electric power device is arranged in the protection box body, at least one airflow ejector is installed in the protection box body, an air outlet nozzle of a jet flow nozzle of the airflow ejector corresponds to the surface of the electric power device, and the jet flow nozzle is in a wedge shape. Jet air generated by the airflow ejector efficiently and uniformly performs heat dissipation, dehumidification and dust removal on the electric power device, so that the purposes of saving air consumption, reducing energy consumption, preventing electric leakage and short circuit of electric appliances, reducing power loss, prolonging the service life of the electric power device and improving the safety and operation stability of the electric power device are achieved.

The invention discloses a wind power generation system. The system comprises a ground device; the floating device comprises an adjusting air floating piece and a first annular air floating piece, the adjusting air floating piece is movably connected with the ground device, the first annular air floating piece is connected with the adjusting air floating piece, and a through duct is defined by the inner wall of the first annular air floating piece; the wind power generation device is arranged in the duct; and the position of the gravity center of the adjusting air floating piece in the extending direction of the duct is adjustable. According to the wind power generation system, the influence of airflow disturbance, temperature change and buoyancy lift gas leakage on the floating device can be reduced, the phenomenon that the pitching posture change amplitude is large is reduced, particularly, the included angle between the wind receiving face of the blade of the wind power generation device and the airflow direction is closer to the optimal value, the effective wind energy area flowing through the blade is increased, and the wind power generation efficiency is improved. And the fluctuation of the wind energy yield along with the posture is reduced, so that the wind energy utilization efficiency and the power generation output power are improved.

The invention discloses a mountainous area wind field downscaling optimization method based on high-precision simulation, and relates to the technical field of meteorological numerical simulation, and the method comprises the steps: obtaining the terrain elevation data and meteorological monitoring data of a target mountainous area, recognizing slope abrupt change points, constructing a spiral sampling path, calculating a slope change value, determining the distance between sampling points, and generating target sampling data; performing orthogonal decomposition on the sampled data to obtain a frequency component, calculating a surface fluctuation coefficient, and constructing a boundary disturbance equation to obtain surface stress distribution; calculating an airflow motion state based on surface stress distribution, solving a vorticity equation to obtain vorticity characteristics of a leeward area, and calculating airflow motion correction parameters; and carrying out downscaling iterative operation on the corrected parameters and the meteorological monitoring data to generate target area wind field data with hectometer-magnitude spatial resolution. The simulation precision of the local wind field under the complex terrain condition is improved.

The invention relates to the technical field of ocean new energy technology utilization, and discloses an oscillating water column type wave energy power generation system with an energy gathering structure at the bottom, which comprises a jacket, an air chamber, a turbine power generation system, a radar altimeter, an infrared camera, an airflow velocity sensor, a control host and a bottom energy gathering assembly, the bottom energy-gathering assembly is installed at the lower end of the air chamber and provided with a transmission mechanism, reflection and diversion of seawater at the bottom of the air chamber are achieved through the arranged horizontal bottom plate and the two symmetrically-arranged energy-gathering plates, energy gathering beyond the width of the air chamber is completed, and opening and closing of the energy-gathering plates are synchronously controlled through the transmission mechanism. And the amount of seawater flowing into the air chamber from the water inlet is changed. According to the wave energy power generation system, the oscillation intensity of the water column in the air chamber can be adjusted according to changes of sea surface waves, the speed of the generated air flow can be matched with the optimal working frequency of the turbine power generation system, the power generation efficiency of the device is guaranteed, and the oscillation water column type wave energy power generation device can be protected and prevented from being impacted by sea waves.

The invention discloses a power transmission line short-time icing growth prediction method considering microtopography influence, and particularly relates to the technical field of icing growth prediction.The method comprises the steps that a structure state sequence at a power transmission line tower is obtained, disturbance characteristics are calculated, and combined judgment is executed to output a structure disturbance state identifier; by obtaining a structure state sequence and executing disturbance characteristic calculation, the structure disturbance state is jointly judged; in a structure disturbance state, a disturbance correction wind speed field is formed based on disturbance calculation and terrain factors, airflow retention is recognized, and the water vapor gathering amount is calculated; then constructing a structure disturbance feedback path and executing icing growth prediction, and dynamically updating the feedback path weight based on a prediction offset result; and calculating a feedback score value in a rolling manner and identifying a structure disturbance dominant region, thereby realizing ice coating growth prediction path identification and increment output under linkage of a structure disturbance state, disturbance airflow characteristics and terrain factors.

The invention relates to the technical field of heat dissipation, in particular to a standing wave heat dissipation device and system, and the device comprises an active film and a passive film which are oppositely arranged. A standing wave cavity is arranged between the active film and the passive film. The cavity wall of the standing wave cavity is provided with an air flow hole channel. The active film and the passive film can vibrate in opposite directions at the same frequency, form standing waves in the standing wave cavity, continuously extrude gas in the cavity and present a surge state, so that the air in the standing wave cavity is continuously compressed and extruded from inside to outside to form an inside-outside pressure difference, and the gas in the standing wave cavity is repeatedly extruded to pass through the gas flow hole channel; and the air flow is jetted to the outside of the standing wave cavity at a high speed in a surge state to form a continuous constant high-speed air flow. When the standing wave heat dissipation device provided by the invention is used for heat dissipation, the active film and the passive film are subjected to reverse same-frequency vibration to form standing wave extrusion airflow, and compared with single vibration film vibration extrusion airflow, the airflow is faster, the efficiency is higher, and the heat dissipation effect is better.

The invention relates to the technical field of helicopter aerodynamic force simulation, and discloses a sea rescue helicopter rotor aerodynamic force simulation method and system. The method comprises the following steps: acquiring a rotor wing downwash airflow historical speed data set, a historical sea surface wave data set and a historical aerodynamic pressure data set monitored within a preset historical time range; executing a dynamic volatility analysis process on the three types of historical data sets to generate a speed volatility index, a sea surface wave volatility index and an aerodynamic pressure volatility index; taking the three types of volatility indexes as guide parameters, performing adaptive search operation in a rotor aerodynamic force simulation parameter database, and determining an optimal simulation time interval; and performing numerical calculation simulation on pneumatic coupling between the rotor wing and the sea surface according to the optimal simulation time interval to generate a simulation data sequence, performing feature extraction and classification on the simulation data sequence by using an aerodynamic force recognition model, and outputting a rotor wing aerodynamic force simulation result.

The invention provides a radar rainfall real-time estimation system based on double-method fusion and ground verification, belongs to the technical field of meteorological radar rainfall estimation, and adopts double-method fusion of a physical model estimation module and a driving model estimation module to cooperate with a causal inference fusion engine to improve the precision and adaptability of rainfall estimation and improve the rainfall estimation accuracy. The physical model module adaptively selects a Z-R, ZDR-R or KDP-R relation according to the quality of radar-based data and rainfall scenes, drives the model module to capture space-time nonlinear evolution characteristics of rainfall echoes and predicts short-time rainfall dynamics, and the causal inference engine identifies differentiated characteristics of two estimation fields, inferes hail, vertical airflow and other physical hybrid factors, and performs real-time prediction on the hail, the vertical airflow and other physical hybrid factors. A comprehensive rainfall estimation field is generated, a continuous error correction field converted from ground station observation data is corrected through a space-time error atlas network, and finally rainfall estimation information is generated for real-time rainfall estimation, so that the adaptability to a complex weather field and the precision of the estimation field are improved.

The invention discloses a high-altitude parabolic positioning traceability analysis method and system, and particularly relates to the technical field of positioning traceability. Motion parameters of an object are calculated by adopting a multi-frame image analysis method, rotary motion is detected by utilizing a deep learning algorithm, if rotation exists, a Magnus effect compensation model is introduced to correct trajectory calculation, meanwhile, wind speed and wind direction data are collected in real time, airflow change is simulated in combination with a computational fluid dynamics model, and the influence of wind power on the trajectory is corrected. Based on the corrected trajectory data, the initial throwing position of the object is reversely deduced in combination with a building three-dimensional structure model, a target person in charge is determined, and a complete traceability report is generated by comparing an analysis result with a monitoring video, so that the accuracy and traceability of traceability analysis are ensured. The method can effectively reduce the calculation error caused by the rotation effect, wind field interference and other factors, improves the precision of high-altitude parabolic traceability, and provides a scientific basis for responsibility determination.

The present invention provides a salt fog solid particle concentration monitoring system for coastal environments, which adopts a salt fog solid particle concentration monitoring device and an external processing system. The device includes a hard enclosure and two valve assemblies arranged inside the hard enclosure, an adaptive tightening system and two monitoring mechanisms. The hard enclosure has an air flow channel that passes through the front and back. The two valve assemblies divide the air flow channel into three spaces along the longitudinal direction of the air flow channel. The valve assembly includes an air intake mechanism and an air outlet mechanism. When the air flow reaches a predetermined wind force level, the air flow opens the air intake mechanism and the air outlet mechanism on the windward side and enters the middle space, driving the adaptive tightening system so that the adaptive tightening system closes the air outlet mechanism on the windward side. At the same time, the air flow continues to move forward and flows through the monitoring mechanism on the leeward side. The monitoring mechanism is used to monitor the salt fog solid particle concentration of the air flow passing through.

The invention discloses an intelligent smoke furnace catalysis operation condition suitability grading method. The method comprises the steps that basic parameters of an operation point are obtained; calling a Passive-Toner algorithm to calculate the atmospheric stability grade of the operation point; the continuous cigarette lighting source intensity is calculated according to the used flame bar combustion data; calculating the vertical airflow distribution of the operation point by adopting a Matviyerv vertical velocity theoretical model based on the altitude and vertical airflow observation data of the operation point; based on the continuous cigarette lighting source intensity, calculating the ice nucleus number concentration distribution in the cloud in combination with the vertical airflow distribution and the horizontal wind field; calculating an operation suitability index by adopting a comprehensive index algorithm in combination with the lifting condensation height, the cloud amount and the cloud classification data; and performing grading processing on the job suitability index according to a set threshold value combination so as to output a plurality of job suitability grading results. According to the method, comprehensive analysis is carried out by considering the meteorological condition and the catalytic condition of the operation point, so that the accuracy and the credibility of an operation condition suitability judgment result are improved to a certain extent.

The invention provides a double-channel air inlet mixing rectifying device which comprises an inner culvert high-temperature air flow channel, an inner culvert rectifying cone is fixedly arranged at an inner culvert outlet of the inner culvert high-temperature air flow channel, and the head structure of the inner culvert rectifying cone is obtuse; a flow channel of the outer culvert rectifying cavity comprises a first-stage outer culvert rectifying plate, a second-stage outer culvert rectifying plate, a third-stage outer culvert rectifying plate and a fourth-stage outer culvert rectifying plate, airflow holes are formed in the first-stage outer culvert rectifying plate so that the flow channel can be divided into a first-stage rectifying cavity and a second-stage rectifying cavity, airflow holes are formed in the second-stage outer culvert rectifying plate so that the flow channel can be divided into a second-stage rectifying cavity and a third-stage rectifying cavity, and airflow holes are formed in the third-stage rectifying cavity. An outer culvert inlet of the outer culvert rectifying cavity is formed in the first-stage rectifying cavity; the multiple third-stage outer culvert rectifying plates are evenly arranged in the flow channel in the circumferential direction so that the flow channel can be divided into a third-stage rectifying cavity and a fourth-stage rectifying cavity, and the multiple fourth-stage outer culvert rectifying plates are evenly arranged at an outlet of the fourth-stage rectifying cavity in the circumferential direction. The air flow field uniformity of the inner culvert outlet and the outer culvert outlet of the device is improved, and the afterburner test piece inlet flow field requirement is met.

The present invention discloses an active control wind tunnel for separately simulating mean wind and pulsating wind, belonging to the technical field of wind tunnel experimental research. This wind tunnel is a single test section direct current unsteady wind tunnel. A power section A is arranged at the front section of the wind tunnel. The power section A includes an array of fans for generating pulsating wind located at the very front end of the wind tunnel and a fan A for generating mean wind located in the flow direction of the pulsating wind air flow. The air flows generated by the array of fans and the fan A pass through the test section and are finally discharged from the air outlet at the end of the wind tunnel. A rainfall device is arranged in the test section. The wind tunnel is controlled by two independent active control modules, namely the fan A control system and the array of fans control system. The array of fans and the fan A can be used separately or in combination to achieve the simulation of complex wind field changes. A steady wind tunnel can also be arranged under the unsteady wind tunnel. The two layers of wind tunnels can be used separately or in combination to achieve specific functions such as simulating natural phenomena.

A full-circumferential wind gathering device comprises a wind gathering structure, a Venturi tube acceleration structure and a wind blocking structure. The air collecting structure comprises a body, a plurality of upper-stage guide vanes and a plurality of lower-stage guide vanes, the upper-stage guide vanes and the lower-stage guide vanes are arranged on the body and arranged in a staggered mode, the lower end of the body is connected with the upper end of the Venturi tube acceleration structure, and the air blocking structure is fixed to the lower end of the Venturi tube acceleration structure. Wind is blown from the direction parallel to the ground, captured by the upper blades and guided into channels between the upper blades on the windward side, after airflow enters the channels, the speed is gradually decreased, airflow kinetic energy is converted into pressure energy, and the pressure energy is gathered and compressed at the arc-shaped concave position of the inner taper pipe to form an inlet high-pressure area. According to the two-stage staggered type inlet guide vane structure and the layout optimization method thereof, two-stage staggered type key improvement is conducted on the inlet guide vane structure, adaptive adjustment is conducted on the overall structure layout of the inlet guide vane structure, all-circumferential incoming flow convergence is achieved, and the wind gathering acceleration effect of the device is improved.

The invention discloses a low-altitude aircraft route real-time meteorological risk early warning method and system, and belongs to the technical field of flight risk identification. The method is used for solving the technical problem that the missing report rate of sudden weather phenomena such as wind shear and micro downburst in an existing scheme is high. The three-dimensional wind shear and turbulence intensity is identified through bimodal cooperation, and the limitation of traditional single-parameter identification is broken through; through independent modeling of normal rigidity and tangential damping, the risk characteristics of vertical airflow and horizontal wind shear are decoupled, so that the risk identification precision can be effectively improved; a height self-adaptive threshold value can effectively reduce the false alarm rate of a low-altitude complex terrain scene; according to the nonlinear attenuation control, through a tanh function, a dynamic response that the larger the risk overshoot is, the stronger the control force is is, and the risk energy propagation depth can be effectively reduced; by using the amplification effect of fractional differential on weak disturbance, the detection rate of risk abrupt change can be effectively improved, and missing report of sudden risks is avoided.

The invention discloses an unmanned aerial vehicle water body fixed-point sampling device, which relates to the technical field of water sampling, and comprises an unmanned aerial vehicle body and a telescopic rod arranged below the unmanned aerial vehicle body, the airflow collecting mechanism is arranged outside the telescopic rod and can be automatically unfolded or folded according to lifting of the unmanned aerial vehicle body; the air collecting disc is located below the telescopic rod and used for collecting airflow; the airflow guiding mechanism is arranged at the bottom of the air collecting disc and used for circularly supplying air to the water surface from inside to outside; a sampling pipe capable of automatically rotating and moving downwards according to lifting of the unmanned aerial vehicle body and a spiral probe installed at the bottom of the sampling pipe and capable of synchronously rotating with the sampling pipe and moving downwards are arranged in the wind collecting disc, and wind power of the airflow guiding mechanism drives the water surface to regularly diffuse water ripples outwards, so that duckweeds are made to be away from a sampling center along with the ripples; water surface fluctuation is reduced, it is ensured that the water sample is not interfered by underwater sediment, and interference of underwater obstacles is further avoided through cooperation with the spiral probe which automatically rotates and moves downwards.

The invention relates to a device and a method for automatically adjusting airflow pulsation speed along with wind speed change. The device comprises a grating blade, a grating blade mounting frame mechanism, a grating blade horizontal righting mechanism, a grating blade flapping wing vibration executing mechanism and a grating blade flapping wing amplitude adjusting mechanism, the grating blade mounting rack mechanism is fixedly arranged in the wind tunnel; the grating blades are arranged on the grating blade mounting frame mechanism; the grating blade horizontal righting mechanism is positioned above the wind tunnel and is connected with the grating blade mounting rack mechanism; the grating blade flapping wing vibration executing mechanism is located below the wind tunnel, and the grating blade flapping wing amplitude adjusting mechanism is arranged on the grating blade flapping wing vibration executing mechanism and connected with the grating blades through a transmission connecting rod. According to the invention, the replacement process of a traditional damping net, a grating and the like is omitted, the test efficiency and the normalization are improved, the airflow pulsation speed can be automatically adjusted according to the wind speed change, the purpose of keeping the turbulence basically constant under different wind speed conditions is achieved, and the accuracy and the reliability of test data are effectively improved.

The invention provides a salt mist solid particle concentration monitoring system for a coastal environment, which adopts a salt mist solid particle concentration monitoring device and an external processing system, and the device comprises a hard enclosure, and two valve assemblies, a self-adaptive jacking system and two monitoring mechanisms which are arranged in the hard enclosure, an air flow channel penetrating front and back is formed in the hard fence, the two air valve assemblies divide the air flow channel into three spaces in the longitudinal direction of the air flow channel, each air valve assembly comprises an air inlet mechanism and an air outlet mechanism, and when the air flow reaches the preset wind power level, the air flow opens the air inlet mechanism on the windward side and the air outlet mechanism on the windward side; the air flow enters the middle space to drive the self-adaptive jacking system, so that the self-adaptive jacking system closes the air outlet mechanism on the windward side, meanwhile, the air flow continues to advance and flows through the monitoring mechanism on the leeward side, and the salt mist solid particle concentration of the flowing air flow is monitored through the monitoring mechanism.

The air guide plate comprises an air guide plate body, and the air guide plate body comprises a first air guide face, a transition air guide face and a second air guide face which are sequentially arranged in the width direction of the air guide plate body. At least one part of the first air guide face is obliquely arranged relative to the transition air guide face in the direction back to the transition air guide face, and at least one part of the second air guide face is obliquely arranged relative to the transition air guide face in the direction back to the transition air guide face. According to the air guide plate and the air conditioner, at least one part of the first air guide face is obliquely arranged relative to the transition air guide face in the direction opposite to the transition air guide face, vortexes formed by airflow at the air guide plate can be reduced, and therefore the risk that the air conditioner has the condensation problem is reduced; at least one part of the second air guide face is obliquely arranged relative to the transition air guide face in the direction opposite to the transition air guide face, the landing speed of airflow passing through the air guide plate can be increased, and the heating effect of the air conditioner is improved.

According to the ultra-efficient energy-saving method and device for automobiles, ships, trains, submarines and aircrafts, when the automobiles and the ships advance, the heads push air to scatter all around, and negative pressure areas are formed on the bodies and the tails of the automobiles and the ships to suck and pull the automobiles and the ships. A rear flow cover 2 is additionally arranged at the head of the vehicle and vessel, scattered air is forced to leave the rear flow cover in an accelerated mode in the direction opposite to the advancing direction of the vehicle and vessel and flow towards the side and the tail of the vehicle and vessel, power (reverse thrust) is provided for the vehicle and vessel, air in a negative pressure area of the side and the tail of the vehicle and vessel is supplemented, the speed of airflow leaving the rear flow cover relative to the ground is reduced, and energy loss is reduced. A water baffle 4 is arranged on the bow, and the bottom edge of the water baffle is connected with a water pressing plate 5, so that the water pressure of the raised water level pushes the boat to advance. The water pressing plate is located on a static horizontal plane, so that the ship does not easily shovel water when advancing. The two sides of the ship are respectively provided with a manger board 1, so that waves generated by the ship surge towards the tail of the ship to reversely push the ship to advance. The air bag is arranged at the tail of the vehicle, high-pressure air generated by the windward side of the head of the vehicle is conveyed to the air bag, the air bag is prone to deformation and automatically searches for a large-negative-pressure position to fill a negative-pressure area, resistance is reduced, and safety is achieved.

The automatic feeding device comprises a storage tank, an air pump, a conveyor, an inner pipe, an outer pipe and a conical disc, the storage tank is communicated with the inner pipe through the conveyor, the inner pipe is located in the outer pipe, the opening position of the lower end of the outer pipe is higher than the opening position of the lower end of the inner pipe, and the conical disc is located in the outer pipe. An air flow channel is formed between the outer pipe and the inner pipe, the top of the air flow channel is communicated with a first electromagnetic valve, the inner pipe is communicated with the air pump through an air pipe, an upper cavity and a lower cavity are formed in the conical disc, the outer edge of the lower cavity is communicated with the edge of the conical disc, and the outer edge of the lower cavity is communicated with the edge of the conical disc. The upper cavity is communicated with the lower cavity through a plurality of exhaust holes, the exhaust holes are provided with separation nets, the upper cavity is communicated with an exhaust pipe, and the exhaust pipe is provided with a second electromagnetic valve. According to the automatic feeding device of the deep sea net cage, floating type feed can be conveyed to the deep sea for feeding, and the feed is prevented from sinking to the bottom after entering the deep sea.

The invention relates to the technical field of laser measurement, in particular to a laser interference surface shape measurement method based on a calibration plate, a medium, equipment and a system. Comprising the following steps: attaching a reflecting mirror to a reference mirror, and obtaining reflecting surface shape data of the reflecting mirror; the calibration glass plate is tightly clamped between the reflector and the reference mirror, and light facing surface reflection surface shape data and mixed transmission surface shape data of the calibration glass plate are obtained; removing the reflector, moving the calibration glass plate to a preset measurement distance along a laser optical axis, carrying out multi-surface synchronous measurement through a laser interferometer, and respectively obtaining light facing surface mixed reflection surface shape data and to-be-measured surface shape mixed data; and obtaining target surface shape data of the surface to be measured. According to the invention, the movable calibration glass plate is introduced to establish a double-reference measurement system, so that the space calibration of the airflow disturbance error can be realized. The device is simple in structure and low in measurement environment requirement. Interference of air turbulent flow can be eliminated only through single-time measurement, and the measurement time is saved.

The invention provides an offshore wind power flexible anti-collision device giving consideration to wave energy power generation and ship collision energy absorption, and belongs to the technical field of offshore power generation equipment. The offshore wind power flexible anti-collision device giving consideration to wave energy power generation and ship collision energy absorption comprises a fixing structure, a flexible air bag, an airflow pipeline, a PTO system, a control system and an inflation rebound structure; the fixing structure is located on the lower side of the offshore wind power pile winding platform and around the single pile foundation. The flexible air bags are distributed on the fixing structure in an annular array mode, the flexible air bags are in orange petal shapes, and an air hole is formed in the top of each flexible air bag; the lower end of the airflow pipeline is connected with an air hole in the top of the flexible air bag, the airflow pipeline vertically and upwards penetrates through the pile winding platform, an air turbine is arranged in the airflow pipeline, and the top is connected with a PTO system. The PTO system is arranged at the upper part of the pile winding platform; an inflating device of the inflating rebound structure is arranged at the upper part of the pile winding platform; the problems that the anti-collision performance is poor, and the device cannot be damaged due to multiple collisions can be solved.

The invention discloses a design method of an array type silencer adaptive to a main ventilation air path between a stator iron core of a hydraulic generator and an air cooler and the array type silencer, and relates to the technical field of suppression or reduction of noise of the hydraulic generator. The method comprises the steps of S1, obtaining aerodynamic noise data and airflow parameters of a main ventilation air path, S2, determining a silencing thought and a micro-perforated plate array core structure according to broadband vortex, discrete rotation, vortex falling and surge noise, S3, determining the boundary dimension and preliminarily calculating the airflow parameters, S4, designing plate parameters in combination with a micro-perforated resonance formula, and S5, calculating the noise of the micro-perforated plate array. S5, performing simulation optimization and S6, accurately accounting airflow parameters, and locking a scheme meeting requirements; the silencer comprises a shell and a plurality of micro-perforated plates, and the multiple layers of micro-perforated plates are arranged in series. The invention has the advantages of no sound absorption material, low wind resistance (the air volume attenuation is less than or equal to 5%, and the pressure loss is less than or equal to 200Pa), the noise of the main wind path is reduced by 5-7dB (A), the service life is long, the operation and maintenance cost is low, and the requirements of the main wind path are met.

The invention relates to the technical field of intelligent sampling, in particular to an unmanned aerial vehicle water sediment intelligent sampling method and system based on rotational flow sorting, and the method comprises the following steps: collecting disturbance trajectory and rotational flow data, identifying a stable inlet, screening an alignment interval, executing screen mesh alignment, and generating a sampling record. According to the method, stable section calibration is formed by superposing wind speed direction fluctuation and rectifying plate track change, the screening range is locked to an alignment interval in combination with multi-parameter mapping of the rotating speed and the particle density, and the sediment movement state is captured in a layered mode in a deposition layer through a screen; a whole-process sampling sequence is constructed by a collaborative time sequence of rectification action and screen operation, so that real water disturbance characteristics can be dynamically extracted, sediment movement rules can be matched, the sampling trigger response accuracy is improved, and the screening alignment precision under multi-factor coupling is enhanced; the target section is accurately captured under the interlaced interference of the airflow disturbance and the particle settling process, and the particle layered structure is stably kept.