34results about How to "Lightweight" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

The utility model relates to a 45-degree oval thoracic cavity curettage spoon, which belongs to the technical field of medical supplies. The utility model discloses handle and harrow hook are connected as an organic whole, the harrow hook includes the harrow hook main part and the spatula who are connected, the spatula is arranged at the front end of the harrow hook main part, the handle is arranged at the rear end of the harrow hook main part, and the spatula adopts oval long groove type design. The utility model has simple and reasonable structure design, is safe and reliable, convenient to operate, can be applied to single-hole and multi-hole thoracoscope, and satisfies the use demand.

A vehicle front structure of the present application is provided with a vibration absorber. The vibration absorber has a recess that forms an internal space, an upper-side through portion that links a space above the vibration absorber to the internal space, a lower-side through portion that links a communication space linked to the upper-side through portion in the internal space to a space below the vibration absorber, and a pair of soundproofing portions. The pair of soundproofing portions separate the communication space and a space adjacent to the communication space in the internal space in the vehicle width direction.

The utility model relates to the technical field of downhole geophysical prospecting, specifically a kind of instrument shock absorption type storage device for downhole geophysical prospecting. Including: storage component, the storage component includes box, lid, storage, shock pad and sealing element, the lid rotationally connected on box, storage is set to the inside of box, shock pad is fixedly connected at the bottom of box, the sealing element is set to the outside of box;Protective component, the protective component is set to the inside of box and lid, and protective component includes buffer, foam pad, magic tape, limiting piece and pull rope, buffer is set to the inside of storage, foam pad is set to the inside of box and lid, magic tape is set to the outside of foam pad, limiting piece and pull rope are all set to the outside of buffer. The utility model can avoid that instrument is extruded harm, utilizes lining bushing and is wrapped with instrument protection, can reduce the impact force from each direction, improves the protection effect to instrument.

The invention relates to the field of thermal insulation materials, and discloses a fireproof thermal insulation coating as well as a preparation method and application thereof. The fireproof heat-insulating coating is prepared from 10 to 30 parts of epoxy resin, 1 to 5 parts of curing agent, 5 to 20 parts of sulfonated polyhedral oligomeric silsesquioxane intercalation modified multi-metal compound, 30 to 80 parts of silicon dioxide, 20 to 50 parts of metal oxide, 0.5 to 1 part of borax, 5 to 20 parts of short fiber and 50 to 80 parts of diluent. The coating provided by the invention takes epoxy resin as a base material, and has the characteristic of light weight compared with a heat-insulating fireproof blanket and a mica plate. The sulfonated polyhedral oligomeric silsesquioxane modified multi-metal compound is compounded in the coating, so that the fireproof and heat-insulating properties and mechanical properties of the coating can be remarkably improved.

This invention relates to the field of integrated circuit manufacturing, specifically disclosing a semiconductor photoelectric level sensor, its fabrication method, and its application. The sensor is a sheet-like structure comprising: a substrate including multiple photodiodes evenly distributed on a ring with a first circular axis perpendicular to the substrate as its axis of symmetry; a circular cavity located on the substrate, perpendicularly corresponding to the ring formed by the multiple photodiodes, and containing a rollable microgravity sphere; and a first signal light guide located on the circular cavity, also circular in shape and perpendicularly corresponding to the cavity, for vertically guiding actively irradiated circular signal light into the cavity. This invention utilizes the lowest point of the circular cavity where the rollable microgravity sphere can freely roll under gravity, and simultaneously guides actively irradiated circular signal light vertically into the cavity, with the multiple photodiodes accurately sensing the precise angular position of the rollable microgravity sphere.

This application discloses a defect processing method, a defect processing device, an electronic device, and a server, belonging to the field of electronic device technology. The method on the first electronic device side includes: when a first operational anomaly event occurs, the first electronic device sends first defect data to a cloud server; the first defect data includes defect data of the first operational anomaly event collected by the first electronic device through pre-embedded points; the first electronic device receives a first Berkeley Data Packet Filter (BPF) program and a first path sent by the cloud server; the first path includes the critical path of the first operational anomaly event; the first electronic device mounts the first BPF program to the first path; when the first electronic device runs on the first path, it triggers the execution of the first BPF program, and collects second defect data of the first operational anomaly event through the first BPF program.

This invention relates to the field of locomotive welding technology, specifically disclosing a positioning device and method for welding locomotive roofs. The positioning device for locomotive roof welding includes: a traveling trolley, a main lifting mechanism, a linkage clamping mechanism, and an arc-shaped rod clamping mechanism; the main lifting mechanism includes a main lifting drive and a lifting seat, with the output end of the main lifting drive connected to the lifting seat; the linkage clamping mechanism includes a horizontal drive and two linkage clamping members spaced apart along a first horizontal direction, the linkage clamping members being used to clamp roof connecting rods; the arc-shaped rod clamping mechanism includes an arc-shaped rod lifting drive and an arc-shaped rod clamping member, the arc-shaped rod clamping member being used to clamp the arc-shaped rod of the roof. The positioning method for locomotive roof welding is accomplished using the above-mentioned positioning device. The positioning device and method for locomotive roof welding can solve the problems of poor flexibility, poor positioning accuracy, and simple clamping fixture structure existing in the positioning mode of existing locomotive roof welding.

The embodiment of the utility model provides a top cover assembly of a vehicle and the vehicle, and belongs to the technical field of vehicle parts, the top cover assembly comprises a top cover cross beam and a top cover outer plate arranged on the top cover cross beam, one end of a side wall connecting plate is used for being connected with a side wall assembly of the vehicle, the other end of the side wall connecting plate is connected with the top cover cross beam, and the top cover cross beam is connected with the top cover outer plate. And the reinforcing piece is connected with the top cover outer plate and the side wall connecting plate so as to support the top cover outer plate together with the top cover cross beam. According to the top cover assembly of the vehicle, the reinforcing piece is used for connecting the top cover outer plate and the side wall connecting plate, the reinforcing piece and the top cover cross beam jointly support the top cover outer plate, and therefore the structural strength of the top cover assembly is locally enhanced, redundant materials are reduced, and the weight of the whole vehicle is reduced on the premise that the bending resistance of the top cover assembly is guaranteed.

The application relates to the technical field of beam structures, in particular to a beam structure which comprises a beam main body and connecting bases, the number of the connecting bases is two, the two connecting bases are symmetrically arranged at two ends of the beam main body, and a butt joint mechanism is arranged between the connecting bases and the beam, the beam main body comprises an outer shell, longitudinal ribs, plate ribs and inclined ribs, the surface of the beam main body is provided with a track structure, the two ends of the inclined ribs are respectively connected with one side of the inner top wall of the outer shell and the inner bottom of one side, the surface of the outer shell is provided with a track and other protruding structures, therefore, the inclined ribs in the beam can realize internal diagonal line connection of the outer shell with the shortest length, the weight of the beam structure is reduced while the strength of the outer shell is improved, and the beam structure can realize minimum weight on the premise of guaranteeing overall strength through the arrangement of the longitudinal ribs, the plate ribs and the reinforcing ribs, so that light weight and high rigidity are considered.

The utility model discloses a pole cooling plate for a cylindrical battery, and belongs to the technical field of battery cooling. The cooling plate comprises two long-strip-shaped aluminum alloy plates which are the first cooling plate and the second cooling plate respectively, trapezoidal cooling flow channels which are arranged in parallel are formed in plate bodies, a contact interface used for being attached to a battery pole column is formed on one side of the cooling plate, and a protruding face is arranged on the other side of the cooling plate. Two ends of the cooling plate are respectively provided with an inlet and an outlet and connected with an external cooling system; the circular groove matched with the pole in shape is formed in the binding face, the contact gap is filled with heat conduction silica gel or a phase change material, and meanwhile, the space between the cooling plate and the battery is filled with insulating powder or provided with an insulating layer, so that the heat conduction efficiency is improved, and the electrical safety is guaranteed. The structure can realize synchronous cooling of a plurality of pole regions, improves heat dissipation efficiency, temperature control precision and module safety, and is suitable for heat management requirements of a new energy automobile battery pack and an energy storage system.

The application relates to the field of noise reduction technology and discloses a spiral acoustic black hole noise reduction module and a design method thereof, which comprises a shell layer, an acoustic black hole cavity and a neck pipe; the shell layer is used for wrapping the acoustic black hole cavity to form a closed space; the acoustic black hole cavity comprises an acoustic black hole cavity plate curved according to an Archimedes spiral line and a rib plate array; the neck pipe is arranged at the rotation center position of the spiral line track of the acoustic black hole cavity plate, and the neck pipe is a sound wave incidence pipe; the rib plate array comprises a plurality of rib plates arranged in an increasing or decreasing length; one end of each rib plate is fixed to the inner side of the acoustic black hole cavity plate, and the other end is a free end; the rib plates are arranged at equal arc lengths / distances, and the lengths are arranged in a monotonically decreasing or increasing rule to form an acoustic black hole structure. The application realizes the sound absorption effect of ultralow frequency with a small size, reaches a sound absorption peak under specific frequency, and enhances the sound absorption effect of the sound absorption device in a specific frequency band.

A deep learning-based method for reconstructing the two-dimensional vector vibration direction of a multi-core optical fiber includes: constructing simulated noise-free data; selecting the same multi-core fiber grating sensor as the simulation, providing the same two-dimensional vibration excitation parameters as the simulation, and collecting measured sensor data; preprocessing the measured sensor dataset to achieve standardized alignment between the measured data and the simulation data; constructing a deep learning model for two-dimensional vibration direction reconstruction; optimizing the deep learning model through a phased training and transfer learning strategy; and reconstructing the two-dimensional vector vibration direction based on the trained deep learning model. This invention automatically extracts complex temporal features from wavelength drift signals by constructing a deep learning model, learns the temporal variation patterns and inter-channel coupling relationships in the signal, effectively mining vibration direction-related information, and overcomes the limitations of traditional geometric models that rely on the assumption of an ideal optical fiber structure, significantly improving the accuracy and precision of vibration direction reconstruction.

The application relates to the powder metallurgy technical field and discloses a manufacturing process of a titanium-based spherical alloy, which comprises the following steps: mixing lanthanum oxide particles and fine titanium powder to prepare composite carrier particles through cold pressing and solidification, and then mixing the composite carrier particles with Ti-Al-V-Nb main powder; pre-drying the powder particles in an argon atmosphere sealed bin, and then performing hard stearic acid film packaging on the surfaces of the powder particles in the same sealed bin; pressing the packaged powder into a spherical green body with an internally threaded hole, and pre-sintering the spherical green body to obtain a porous titanium-based alloy spherical framework; performing copper-aluminum alloy liquid phase infiltration on the porous framework, and performing post-processing after cooling and solidification to obtain a finished product; the hard stearic acid film packaging prevents the pre-drying effect from being damaged by inter-process transfer, and eliminates sintering pores; the pre-solidification of the composite carrier particles eliminates rare earth oxide aggregation segregation; the copper-aluminum alloy liquid phase infiltration improves the compactness and the heat conduction performance; and the obtained spherical alloy sealing element has the comprehensive performance advantages of light weight, high strength and high heat conduction.

This invention provides an autonomous driving simulation testing system, method, device, and storage medium. The method includes: a virtual module component comprising multiple virtual modules, each corresponding to a functional module of the autonomous driving system under test; a virtual control module for combining a specified virtual module from the virtual module component with the functional module under test of the autonomous driving system, simulating the control flow of the autonomous driving system under test, and acquiring vehicle control commands output by the specified virtual module and / or the functional module under test; and a simulation core module for receiving externally input simulation data and vehicle control commands, updating the simulation model, and publishing state information observed from the simulation model. This invention proposes a lightweight and flexible autonomous driving simulation testing system, allowing for flexible adjustment of the testing method according to testing requirements.

The utility model provides a general surgery tool disinfection device belongs to medical instrument disinfection technical field. Including disinfection box, upper cover and placing frame, the upper surface of upper cover has the handle, the upper surface of disinfection box is open setting, the open place is closed to upper cover, and the bottom end surface of upper cover is provided with two groups of vertical rods, two groups of vertical rods are equipped with multilayer placing frame between, and multilayer placing frame is detachably connected with vertical rod, and the surface of vertical rod towards placing frame has installation slot, and the sidewall of placing frame is provided with sliding block, and sliding block and installation slot are matched and inlayed. The utility model discloses through setting placing frame, vertical rod, can carry out quick collection to surgical tool, and disinfect, and the surgical tool is soaked and disinfected, after disinfection, pulls the handle, and placing frame rises, and placing frame can be fixed in midair, and the bottom of placing frame is equipped with screen cloth, can the surgical tool is dewatered, and it is more convenient to use in emergency rescue, field medical aid or remote medical service.

This utility model discloses a loading and unloading system for a van and a van, relating to the field of van technology. The loading and unloading system includes a van floor, a conveying structure, and a cover plate. The van floor has an installation opening extending along the length of the van. The conveying structure is located at the installation opening and is used for transporting goods. The cover plate is detachably installed over the installation opening. The technical solution provided by this utility model improves the protection of the van by the loading and unloading system, preventing damage and extending the service life of the van.

The application discloses a kind of based on porous super-hydrophobic material ventilation air film layer drag reduction device, method and ship, belong to air film drag reduction technical field;Device includes drag reduction component, gas supply module, data acquisition module and control module, drag reduction component includes porous super-hydrophobic plate and the non-porous material super-hydrophobic plate located downstream thereof;The porous super-hydrophobic plate is built-in with several air injection hole air passage, the air inlet of air passage is communicated with gas supply module, gas is ejected from air injection hole by air passage, then it is output to its outer wall surface by the small air hole of porous super-hydrophobic plate, and stable air film layer is formed by flowing through downstream non-porous material super-hydrophobic plate;Data acquisition module transmits collected data to control module, and control module judges whether air film meets requirements according to each data, and if not satisfied, corresponding gas supply amount is adjusted.The application solves the problem that uniform ventilation of the whole ship body is difficult to realize due to external water pressure in the prior art;Meanwhile, the injection rate is regulated.

This invention discloses a method and apparatus for detoxifying large language models based on Euclidean flow matching, belonging to the field of artificial intelligence. To better balance detoxification effect and generation quality, this invention extracts features from the LLM output using a sparse autoencoder, performs detoxification transformation based on Euclidean flow matching, and finally replaces the original input activation, guiding the LLM to generate non-toxic content. This invention, applied to the field of large language models, can efficiently detoxify LLMs without significantly sacrificing fluency.

The invention discloses a repairing method for a damaged stringer of a composite T-shaped stringer stiffened wallboard, and relates to the technical field of aviation composite repairing. The repairing method for the damaged stringer of the composite T-shaped stringer stiffened wall plate comprises the following steps that a skin and the damaged area of the stringer are removed to form an opening, and the edge of the opening is polished to form a repairing window. And a skin repairing patch is bonded to the repairing window. Bonding a bottom edge repairing patch on the skin repairing patch; a T-shaped stringer insert is bonded to the bottom edge repairing patch, and the cut stringer is filled with the T-shaped stringer insert; and L-shaped stringer repairing patches are symmetrically laid on the two sides of the T-shaped stringer insert. According to the repairing method for the damaged stringer of the composite T-shaped stringer stiffened wallboard, uniform load transmission, smooth rigidity transition and excellent fatigue performance are achieved, meanwhile, the composite T-shaped stringer stiffened wallboard is light in weight, the smooth pneumatic shape is kept, seamless sealing is provided to prevent corrosion media from invading, and secondary damage caused by drilling in an original structure is avoided.

The invention discloses a scrubber. The scrubber comprises a cleaning head and an integrated water tank; the cleaning head comprises a shell, a motor installed on one side of the shell, a roller assembly connected to the motor in a sleeving mode and a brush assembly connected to the two sides of the shell in a bridging mode. The motor drives the roller assembly to rotate so as to drive the brush assembly to rotate synchronously. The integrated water tank comprises a clear water cavity and a sewage cavity, is horizontally installed on the rear half part of the shell in a single-side in-out mode, and provides clear water for cleaning for the cleaning head and collects sewage after cleaning. The scrubber provided by the invention is simple in structure, the weight of the handle is reduced, a user can feel lighter when pushing or pulling the scrubber, the standby time of the scrubber can be prolonged on the premise that the size of the scrubber is not increased, and meanwhile, the noise of the scrubber in a working state can be reduced.

This invention discloses a method for forming a large aspect ratio sand core mold, comprising the following steps: (1) Tooling design: designing the diameter and length of the solid mandrel according to the product opening size and the self-weight of the core mold; (2) Machining: machining a set of metal parts according to the design drawings; (3) Sand cake making: preparing polyvinyl alcohol water-soluble sand cake using water-soluble quartz sand / hollow glass microspheres as filler; (4) Core mold assembly: installing the flat-end sand cake in a vertical manner; (5) Core mold machining: machining the outer core surface of the core mold according to the inner shape of the product. The large aspect ratio sand core mold produced by this invention has the characteristics of high strength, lightweight, and simple manufacturing process, avoiding the risk of core mold surface breakage caused by mandrel deflection deformation, and is suitable for the production of large aspect ratio shells.

The application relates to a modified samarium oxide reinforced high-temperature-resistant neutron shielding material and a preparation method thereof, and belongs to the technical field of neutron shielding materials for nuclear radiation protection. The modified samarium oxide reinforced high-temperature-resistant neutron shielding material is composed of polyamide-imide (PAI) resin and modified samarium oxide (M-Sm2O3); the mass ratio of the PAI resin and the M-Sm2O3 is 9:1 to 7:3; wherein the M-Sm2O3 is samarium oxide (Sm2O3) modified by a silane coupling agent gamma-aminopropyl triethoxysilane (APTES). The M-Sm2O3, which is obtained by modifying the surface of a Sm2O3 neutron absorber by APTES, is introduced into a high-temperature-resistant PAI resin matrix, the interface compatibility of the filler in the matrix is effectively improved, and thus the M-Sm2O3 / PAI composite material which has high-temperature resistance and high-efficiency neutron shielding is prepared.

The utility model discloses a novel prefabricated high-strength combined guardrail structure for a bridge. A prefabricated concrete base unit is used for being connected with a bridge panel and fixing a steel structure guardrail unit; a wet joint notch is formed in the bottom face of one side of a head-on collision face of each prefabricated concrete base unit, annular steel bars are arranged in the wet joint notches, U-shaped steel bars are arranged on a bridge face plate, and the adjacent annular steel bars are connected through longitudinal steel bars in a binding mode. The annular reinforcing steel bars and the U-shaped reinforcing steel bars are oppositely staggered, U-shaped openings of the U-shaped reinforcing steel bars are provided with hooks, transverse sealing reinforcing steel bars are arranged between the hooks of the U-shaped reinforcing steel bars, and the transverse sealing reinforcing steel bars and the longitudinal reinforcing steel bars are arranged in an intersecting mode. According to the scheme, on one hand, the prefabricated concrete base unit is connected with the bridge panel through the cement mortar cushion layer, on the other hand, the open-type wet joint notches are formed, connection between the prefabricated concrete base unit and the bridge panel is enhanced through the UHPC grouted in the notches and the steel bars arranged in the staggered mode, the construction quality is effectively guaranteed, and the construction difficulty is reduced; and the quality of the prefabricated guardrail is effectively improved.

This utility model relates to the field of drainage pipe technology, specifically to a hydraulic drainage pipe with a buffer function. It includes a drainage pipe comprising a first pipe and a second pipe horizontally fixedly connected at their ends; and a buffer assembly, which includes an annular plate disposed on the outer side of the second pipe, the diameter of which is larger than the diameter of the second pipe. Multiple mounting plates are disposed on the inner side of the annular plate, and buffer springs are fixedly connected to each of the mounting plates and the annular plate. The variable diameter design, the buffer assembly, and the synergistic effect of the foam layer effectively reduce the impact and wear of water flow on the pipe. The buffer assembly reduces the direct damage to the pipe from the impact force, and the foam layer reduces the wear of the pipe's inner wall caused by water flow scouring. These multiple protective measures together extend the overall service life of the pipe, ensuring stable and efficient operation, effectively mitigating water flow impact, reducing noise, and extending the pipe's service life.

This invention provides a vehicle body structure and a vehicle, the vehicle body structure including magnesium alloy structural components, aluminum structural components, and steel structural components; the steel structural components and magnesium alloy structural components are respectively connected to opposite sides of the aluminum structural component; the magnesium alloy structural component has at least one connecting area for connecting the aluminum structural component, the connecting area having multiple clearance gaps, and the aluminum structural component has multiple first connecting points for connecting the steel structural component, each first connecting point being opposite to a clearance gap. This invention improves the corrosion resistance of the vehicle body structure, ensures the safety of the vehicle body structure, and achieves a lightweighting and weight reduction effect.

The invention provides anti-interference AR glasses based on high-integration chip packaging, and relates to the technical field of augmented reality equipment, and the anti-interference AR glasses comprise a glasses frame, AR lenses embedded in the glasses frame, glasses legs movably connected with the glasses frame, and a control terminal; connecting pieces are arranged at the two ends of the spectacle frame and are hinged with the spectacle legs; a packaging structure is arranged in the glasses leg, and the packaging structure is used for fixing the control terminal; according to the packaging structure, the integrated packaging design is adopted, the core processing chip, the communication chip, the storage chip and the passive element are integrated in the same packaging body, and the overall size is effectively reduced; more space flexibility is provided for the internal layout of the glasses legs, so that the overall design of the glasses is smaller and lighter, the glasses accord with human engineering, and the comfort of a wearer is improved.

The application discloses a fiber composite chassis beam with pre-tensioned fiber bundle, and relates to the technical field of automobile chassis structure and composite material automobile body part. The chassis beam comprises a beam body, a pre-tensioned fiber bundle, a metal pressure-bearing component and a battery accommodating bin. The beam body is a fiber-reinforced composite material beam body. The pre-tensioned fiber bundle is embedded in the beam body along the length direction of the beam body, and the two ends of the pre-tensioned fiber bundle are anchored in the end area of the beam body, and the pre-tensioned fiber bundle maintains the pre-tension stress along the length direction in the beam body. The metal pressure-bearing component is arranged at the motor suspension point or the suspension connecting point of the beam body, and is used for dispersing the local compression load and the shear load at the connecting point. The battery accommodating bin is arranged in the middle area of the beam body, and forms an integrated load-bearing structure with the beam body. The application is beneficial to reducing the crushing and delamination risks of the connecting area of the composite material beam body, and reducing the use of the independent externally-hung battery support.

The utility model discloses a wide-area piezoelectric energy coupling and collecting device based on blade full-coverage type arrangement, which comprises an energy concentration system and a piezoelectric transduction system, and is characterized in that the energy concentration system comprises a front energy concentration pipe part, a necking part and a rear flow velocity raising pipe part which are connected in sequence; the piezoelectric transduction system comprises piezoelectric blades which are fixedly installed in the front energy concentration pipe part and covered with PVDF films, and the piezoelectric blades are connected with an external energy transmission system. The fluid energy collecting device only comprises two main parts, namely an energy concentrating system and a piezoelectric transduction system, has the characteristics of miniaturization, light weight and simple structure, is high in universality, can be widely applied to multi-scene fluid energy collection, and has the outstanding advantages of high energy collecting power density and high complex flow field adaptability; and deep utilization of multi-energy coupled fluid energy is facilitated.

The application relates to a kind of unmanned aerial vehicle access control methods based on blockchain, belong to the field of blockchain technology.The method comprises the following steps: S1: 5G cellular base station configures gNB blockchain network, and deploys smart contract;S2: UxNB sends network assistance C2 link to 5G cellular base station and sends network access request message to carry out identity registration;S3: the UxNB of successful registration is associated with gNB and constructs UxNB blockchain network;S4: based on correlation algorithm determines the association strategy of UAV device and UxNB;S5: UAV device sends network access request message to associated UxNB and carries out identity registration;S6: UxNB and 5G cellular base station interact;S7: inquires the access control strategy of UAV device in UxNB blockchain network;S8: UxNB forwards access request to 5G cellular base station through network assistance C2 link, and inquires the access control strategy of UAV device in gNB blockchain network.