45results about How to "Avoid design" patented technology

The invention discloses a circularly polarized dielectric resonator two-dimensional beam scanning phased-array antenna based on liquid crystal, and belongs to the technical field of microwave antennas. The antenna comprises an elliptic cylindrical dielectric resonator radiation structure, a sequential rotation feed network and a liquid crystal phase shifter structure based on a glass plate, wherein the elliptic cylindrical dielectric resonator radiation structure and the sequential rotation feed network are arranged on a flexible printed circuit board (FPC); the radiation structure and the feed network which are arranged on the FPC comprise a radiation unit, an FPC layer and a feed network; the liquid crystal phase shifter comprises a glass dielectric substrate, a liquid crystal layer, an inverted spiral microstrip line and a bias network; the elliptic cylindrical dielectric resonator radiation structure realizes wide impedance bandwidth and wide axial ratio bandwidth; the antenna array also uses a sequential rotation method, the axial ratio characteristic of the phased-array antenna is further improved, and the coupling feed structure is simplified by using the design that the L-shaped microstrip line is connected with the inverted spiral microstrip line after sequential rotation.

The invention discloses a hydraulic arm safety control method and device based on parallel learning and a high-order CBF, and the method comprises the steps: building a kinetic equation of a hydraulic mechanical arm through a Lagrange method, integrating unmodeled dynamics, structural parameter change and external interference into an uncertain item, and describing the generalized uncertainty of the uncertain item in a linear parameterization form; for the problem of insufficient excitation in a complex environment task, a parallel learning mechanism is introduced, and historical data and real-time data are combined to realize parameter identification. For high relative order safety constraints (such as obstacle distance constraints and joint limiting constraints) in a task space, an obstacle function family is constructed. A dynamic error buffer function is introduced, and a high-order adaptive control barrier function condition is designed. The high-order self-adaptive control obstacle function constraint is embedded into a real-time quadratic programming solving problem, input obtained through optimization solving can keep the track precision, meanwhile, a joint instruction is automatically corrected to prevent constraint failure, and minimum intervention type safety control is achieved.

The invention discloses a reconfigurable metasurface reflective array based on MOS switch chip regulation and control and an implementation method of the reconfigurable metasurface reflective array. The metasurface reflective array comprises a feed source horn and a reconfigurable metasurface reflective array, the reconfigurable metasurface reflective array comprises a plurality of metasurface reflective array units which are periodically arranged; the metasurface reflective array unit sequentially comprises a top metal structure layer, a first dielectric substrate, a metal ground, a metal power supply layer, a second dielectric substrate and a bottom metal feed layer; and the top metal structure is loaded with an MOS switch chip. According to the invention, two states of 0 degree and 180 degrees of the phase of the metasurface reflective array unit are realized by controlling the on-off of the MOS switch chip, the state of each metasurface reflective array unit in the reflective array is controlled by the FPGA, beam scanning can be carried out at + / -45 degrees, and compared with a reflective array using a PIN tube as a tuning element, the design of a complex feed network is avoided, and the cost is reduced. The method has the advantages of high beam scanning speed and low power consumption.

The invention discloses a crankshaft point cloud semantic segmentation method. The method comprises the steps of performing voxelization downsampling on a crankshaft point cloud model and establishing a Kd-Tree topological structure; calculating normal lines under two different support radiuses, adjusting the direction of the normal lines, and calculating a normal line differential (DoN) characteristic according to a normal line difference; obtaining the number of point neighborhoods with a small support radius, and calculating point cloud curvature and FPFH features; defining an initial target area by taking a point with the minimum number of neighborhood points as an initial seed point; searching a k neighbor point set of the seed points, taking an FPFH feature threshold value and a curvature threshold value as region growth criteria, and performing semantic judgment on a segmented region by using a DoN feature threshold value; when the neighborhood point meeting the growth criterion cannot be found, completing the growth of the current region and continuing the growth of the next region until the whole point cloud is traversed; and completing crankshaft point cloud semantic segmentation according to the number of the marked region points. The method is low in complexity, can accurately complete crankshaft point cloud semantic segmentation, and improves the universality of a crankshaft point cloud segmentation algorithm.

This utility model belongs to the field of milling technology for high-temperature alloys, specifically a simple milling device for rough machining of high-temperature alloy steel. It includes a base, a milling cutter assembly on the top of the base, and a track connecting the milling cutter assembly to the base. The milling cutter assembly can move back and forth along the track. A support is located in front of the base, and a platform is mounted on the support. A frame is located on the side of the platform, and a clamping assembly is mounted on the frame. The clamping assembly includes an indexing chuck, which can move left and right along the frame. This utility model, through the arrangement of multiple tracks, allows for adjustment of the workpiece position, avoiding the Y-axis design of traditional machine tools, reducing the cost and size of the equipment. Simultaneously, its simple operation reduces the labor costs for advanced operators.

The invention discloses a multi-orbit satellite-borne laser communication terminal system, comprising an optical machine body, a tracking and aiming circuit, a communication main control circuit and a laser communication terminal system. The tracking and aiming circuit comprises a motor drive circuit board, a piezoelectric ceramic circuit board, a first and second power conversion circuit board, and a tracking and aiming control circuit board. The communication main control circuit comprises a main control communication circuit board, a second and second power conversion circuit board, a first optical receiving and transmitting circuit board and a second optical receiving and transmitting circuit board. The system, as a satellite payload, completes the establishment of a communication link with a ground terminal, uses laser as an information carrier to exchange and transmit information, and performs satellite-to-ground, inter-satellite and ground terminal laser communications, achieving high code rate, miniaturization, light weight and low occupancy rate requirements, and finally uses a set of optical transceiver system and tracking and aiming system to achieve satellite-to-ground, inter-satellite and ground terminal laser communications.

The present invention relates to a docking device for bent pipe parts, specifically a docking device for bent pipe parts based on two degrees of freedom limiting four degrees of freedom adjustment, wherein the side shift plate and the feed plate are respectively slidably connected to the workbench in the main frame part, the fixed positioning plate is located above the side shift plate, one side of the fixed positioning plate is hinged to the side shift plate, and the other side is threadedly connected with a swing adjustment screw, and the lower end of the swing adjustment screw abuts against the side shift plate; the screw assembly is installed on the main frame part; a screw lift is installed on the feed plate, the output end of the screw lift is connected to the lifting plate, the dynamic positioning plate is fixed on the lifting plate, and another bent pipe to be docked is installed on the dynamic positioning plate. The present invention can effectively constrain the two degrees of freedom of pitch and rotation along the positioning axis of the docked large bent pipe parts, accurately adjust the four degrees of freedom such as the relative height and misalignment of the docking center line, the relative distance of the docking surfaces, etc., and the device has outstanding characteristics, convenient adjustment, and high positioning accuracy.

The invention provides a small-opening low-beam module system which comprises a low-beam lens body, a low-beam light source module, a low-beam main light type total reflection module, a low-beam auxiliary light type total reflection module and a low-beam light-in lens module are arranged at the light-in end of the low-beam lens body, and a low-beam light-out lens module is arranged at the light-out end of the low-beam lens body; a cut-off line area is formed between the low-beam main light type total reflection module and the low-beam auxiliary light type total reflection module; the low-beam main light type total reflection module and the low-beam auxiliary light type total reflection module are located on the upper side and the lower side of the cut-off line area respectively. A traditional low beam optical system is optimized and simplified into one part which is only provided with the light inlet face, the total reflection face and the light outlet face, and the design of a module with an extremely small opening can be achieved.

The present application discloses a cell heating assembly, a battery module and a vehicle. The cell heating assembly includes a substrate and an electric heating circuit. The substrate is provided with Q first supporting parts and P second supporting parts, and each first supporting part is used for supporting one cell; the electric heating circuit includes P electric heaters and a conducting circuit, and the conducting circuit is electrically connected with the P electric heaters; the P electric heaters and the conducting circuit are arranged on the substrate; each second supporting part is used for supporting one electric heater; and at least one electric heater and second supporting part are arranged around each first supporting part. Respective electric heaters can be separately mounted on each second supporting part and electrically connected with each other via the conducting circuit provided on the substrate. In this way, the overall design of the electric heater according to the construction of the substrate can be avoided, thus simplifying the structure of the electric heater, reducing the difficulty of processing the electric heater and improving the versatility of the electric heater.

The invention relates to the technical field of rocket launching platform design and application, in particular to a modular application method of a reconfigurable rocket launching platform, and solves the technical problem that existing launching work generally needs to carry out new launching platform design and demonstration according to rocket requirements. According to the method, a main control unit, a supporting unit, a filling unit and a testing unit framework of a launching platform are formed according to different rocket launching requirements; a plurality of units with different functions are stored in the launching site according to the number of stations, the requirements of rocket launching on a launching platform can be received, and the units with the functions are dispatched according to the actual requirements of a rocket under the dispatching of the main control unit; the unit for supporting the final assembly goes to a final assembly workshop to support rocket final assembly work; under the condition that part of the units do not need to participate in final assembly work, the parts of the units can directly go to a transmitting station for standby preparation; after the rocket is subjected to final assembly, the rocket is transported to a launching station through the units participating in final assembly work in a cooperative mode, and after launching is completed, all the units are withdrawn.

The embodiment of the invention provides a quantum dot information encryption access method and device, computing equipment and a storage medium, and belongs to the technical field of optical storage, and the method comprises the following steps: carrying out an exposure experiment on a quantum dot photoresist storage layer through a direct-writing photoetching system to obtain a relation curve of exposure parameters and excitation light intensity; multiplying and accumulating the original data matrix corresponding to the to-be-stored information and a group of random key matrixes to obtain encrypted data; according to the relation curve, recording the encrypted data on the quantum dot photoresist storage layer through a direct writing photoetching system; quantum dot excitation is carried out on the storage layer after data recording is completed, the excitation light intensity is detected, and an excitation light intensity vector is obtained; and performing second-order association reconstruction operation on the excitation light intensity vector and the random key matrix to recover original data. According to the scheme, efficient and high-precision encrypted storage and reading of data can be realized, and high-precision data positioning is realized.

This invention belongs to the field of vibration and noise reduction technology for new energy vehicles, specifically involving a low-noise design and evaluation method for electric drive systems based on acoustic metamaterials. The method involves determining the peak intensity and frequency of the vibration and noise response of the electric drive system, identifying the significant area of ​​working deformation of thin-walled components in the electric drive system, and determining the installation position of the acoustic metamaterial based on this area. It also involves determining the design boundary parameters of the acoustic metamaterial, designing a local resonant element, artificially constructing the local resonant element, prototyping the acoustic metamaterial based on the artificial construction scheme of the local resonant element in step five, installing the acoustic metamaterial in the determined installation area, and verifying its noise reduction performance. Finally, it determines whether the artificial construction scheme parameters are optimal; if optimal, the acoustic metamaterial scheme is determined. This invention systematically proposes a method for using acoustic metamaterials to mitigate single-frequency noise radiated by the thin-walled structure of the electric drive system, and clarifies the precise selection method for the installation position of the acoustic metamaterial on the thin-walled structure of the electric drive system.

The utility model relates to the technical field of quick-change structures, in particular to a loading vehicle accessory with a quick-change structure, which comprises an accessory, a hanging bracket and a driver, the accessory is used for loading goods, the hanging bracket is used for connecting a loader, and the driver is used for driving a pin shaft to stretch out and draw back; a hanging structure is arranged on the back of the accessory and comprises a hooking part and a hole part; the hanging bracket is provided with a shaft section connected with the hooking part and a pin shaft capable of retracting into or stretching out of the hole part. According to the loading vehicle accessory with the quick change structure, disclosed by the utility model, a loading machine can be quickly connected with the accessory.

The present invention relates to the technical field of lighting fixtures, specifically, a method for preparing a table lamp capable of adaptively driving and adjusting a diffuser angle and a light drive film thereof, comprising a lamp holder, a lamp shell mounted on the lamp holder, a lamp body mounted in the lamp shell, and a dimmer for adjusting the light intensity of the lamp body, wherein a diffuser cover arranged on the lamp body is installed in the lamp shell, and the diffuser cover comprises a light drive film wrapped around the outside of the lamp body, and the light drive film is made of a photosensitive, automatically opened and closed MXene / polyethylene / nano-Ag flexible light-concentrating material, and the nano-Ag is arranged close to one side of the lamp body. When the present application needs to provide a wide range of strong light irradiation, the light is brightened to cause asymmetric deformation of the light drive film, and the irradiation range can be expanded by opening it; when a small range of lighting is required, the light is dimmed to restore the light drive film, and the irradiation range can be reduced by closing it, so as to realize adaptive driving and adjusting the diffuser angle, automatically adjust the illumination range according to the usage scenario, and avoid the complex circuit design caused by multiple sensors, and has a simple structure, is easy to carry, and has a wide range of applications.

The utility model provides a kind of wafer temperature uniform control and automatic transfer integrated device in hot plate air extraction process, including disc-shaped cavity main body and automatic wafer transfer assembly, cavity main body top is plane structure, hot plate upper surface is perpendicular to the central axis of cavity main body, the sealing disc is coaxially arranged with cavity main body;It further includes air inlet and air outlet, air inlet is circularly opened in the sidewall top of the cavity main body;Air outlet is opened in the top surface center of the cavity main body.The utility model determines suitable cavity wall surface material by optimizing cavity structure, reasonably selecting air inlet and air outlet position, solves the problem of wafer temperature uneven in prior art, and realizes wafer automatic taking through intelligent automatic wafer transfer assembly structure under the form of not changing cavity structure, improves the quality and efficiency of semiconductor wafer manufacturing.

The utility model discloses an RTO (Regenerative Thermal Oxidation) type combustion device based on efficient removal of VOCs (Volatile Organic Compounds) and NOx, which belongs to the field of environmental protection and comprises an amino reducing agent nozzle, a fuel gas nozzle and an RTO type reaction device body, and the RTO type reaction device body is sequentially divided into a purging chamber, a flow guide chamber, a heat exchange chamber and a combustion chamber from bottom to top; the amino reducing agent nozzle and the fuel gas nozzle are sequentially installed on the side wall or the top of the same side of the combustion chamber from top to bottom. And the heat exchange chamber is filled with a heat accumulator. According to the utility model, VOCs thermal oxidation and NOx reduction reaction are integrated in the same RTO device, and synchronous treatment of two pollutants is realized by spraying ammonia in a combustion area, so that the problems of complex system design and high energy consumption of the traditional tandem process are avoided, and meanwhile, the equipment investment and the occupied area of the equipment are reduced.

The utility model discloses a continuous photo-catalytic reactor which comprises a reactor shell and a heat exchange pipeline, the upper end and the lower end of the reactor shell are respectively provided with a connecting port, two ends of the heat exchange pipeline are respectively communicated with the two connecting ports of the reactor shell, one side of the reactor shell is provided with an opening, and the opening is communicated with the heat exchange pipeline. An overturning arc plate is rotationally connected to the opening through a hinge, a reactor lamp tube is arranged in the reactor shell, and a power line electrically connected with the reactor lamp tube is arranged at the bottom of the reactor shell; by means of the temperature control assembly, the circulating temperature in the pipe can be regulated and controlled in the using process, a similar annular circulating system is formed, the design of a complex heat exchange air duct is avoided, the machining cost of equipment is reduced, and meanwhile the heat exchange efficiency is greatly improved.

The present application discloses a data transmission method and device, and a computer storage medium. The method includes: a first terminal sends a physical side control channel PSCCH and / or a physical side shared channel PSSCH to a second terminal, and the PSCCH or PSSCH includes feedback information and / or measurement information.

The invention belongs to the field of equipment ID distribution, and discloses an ID distribution method and system, node equipment and a computer readable storage medium, and the method comprises the steps: transmitting a first starting message through a first interface; detecting whether the second interface receives a second starting message within a preset time; if not, confirming the initial ID as the device ID of the current node device, and generating a first ID allocation message; sending a first ID allocation message through the first interface; and if yes, receiving a second ID allocation message, and determining the ID to be allocated obtained from the second ID allocation message as the device ID of the current node device. According to the invention, the node equipment can intelligently judge whether the node equipment is the starting node in the network or not by sending and receiving the starting message through the first interface and the second interface of the equipment within the preset time, so as to autonomously decide whether to initiate ID allocation or receive the ID allocated by the superior node, thereby simplifying the wiring demand of the network, reducing the possibility of communication conflict, and improving the communication efficiency. And high efficiency and stability of communication between devices are ensured.

The present application relates to the field of marine equipment, and aims to provide a full-ocean-depth macrobenthos living sampling and temperature-keeping pressure-transferring device.The device comprises a capture main body structure, an active temperature-keeping structure, a pressure compensator and an electronic cabin; the temperature-keeping box of the active temperature-keeping system is sealingly sleeved outside the main sampling cylinder, and the cavity between the two is filled with heat exchange fluid medium; the thermoelectric refrigeration module is located on one side of the temperature-keeping box, and the upper and lower surfaces thereof are respectively provided with radiating fins; the inner cavity of the radiating fins is filled with heat exchange fluid medium, and is communicated with the skin capsule through a pipeline.The temperature-keeping material-water layer-sample cabin structure form of the active temperature-keeping system not only forms a water jacket type double-layer passive temperature-keeping structure, and the heat releasing bottom surfaces of the cold and hot ends of the refrigeration element of the thermoelectric refrigeration module and the sealing ring on the temperature-keeping cylinder form a seal.The space between the cold and hot end heat releasing units is filled with insulating oil, and is connected to the pressure compensator through a hose to realize internal and external pressure balance, and the design of the pressure-resistant structure is avoided.

The application discloses a method and device used in a node for wireless communication. A first node receives first signaling and transmits a first signal. The first signaling indicates scheduling information of the first signal; the first signal includes a first sub-signal and a second sub-signal; a first field and a second field in the first signaling are respectively used to determine antenna ports for transmitting the first sub-signal and the second sub-signal, or are respectively used to determine precoders of the first sub-signal and the second sub-signal; a load of bits included in the second field in the first signaling is related to K1 candidate integers, and a relationship between the load of bits included in the second field in the first signaling and the K1 candidate integers is related to whether time domain resources occupied by the first sub-signal and time domain resources occupied by the second sub-signal overlap. The above method meets different requirements for the number of bits of the first field and the second field under different multiplexing modes.

The utility model discloses a prefabricated substation. The prefabricated substation comprises a packaging body, a switch cabinet and an arc discharge channel. The packaging body comprises a base, and the top side of the base is provided with an arc discharge area. The switch cabinet is arranged on the base, the switch cabinet is provided with a pressure relief opening, and the pressure relief opening is used for arcing pressure relief of the switch cabinet; a channel inlet of the arc discharge channel is communicated with the pressure discharge opening, and a channel outlet of the arc discharge channel is communicated with the arc discharge area. In the prefabricated substation, an arc discharge channel is used for guiding the trend of electric arcs and pressure, so that the electric arcs and the pressure are guided to an arc discharge area through the arc discharge channel when the switch cabinet carries out arcing pressure relief. The arc discharge area is arranged in the open area of the top side of the base, and the arc and the pressure are safely guided to the arc discharge area through the arc discharge channel, so that arc discharge towards the top side of the base is realized, design of an arc discharge space on the foundation due to downward arc discharge is avoided, the arc discharge cost is reduced, and the space at the bottom of the prefabricated substation is also saved.

The application discloses a railway flat car body and a longitudinal beam of the railway flat car. The longitudinal beam comprises an upper beam body and a lower beam body. The lower beam body is arranged below the upper beam body and is installed on the middle region of the upper beam body in the longitudinal direction through a connecting piece. The lower beam body comprises two end beam modules and a middle beam module. The two end beam modules are installed on the longitudinal two sides of the middle beam module through connecting pieces. The middle beam module is an equal-height beam body. At least a part of the end beam module in the longitudinal direction is a variable-height beam body. In the longitudinal direction, the height of the variable-height beam body gradually increases in the direction close to the middle beam module. The longitudinal beam has less welding, higher green production level and is beneficial to the reasonable distribution of the strength of different regions of the longitudinal beam, thereby reducing the weight.

The application discloses a chaotic reinforced pressurization reaction device, and belongs to the technical field of pressurized hydrometallurgy. The device comprises a first conveying part, a second conveying part, a residence tank and a heat exchanger which are sequentially and closely connected in series. A first speed regulating part is arranged on the first conveying part, a second speed regulating part is arranged on the second conveying part, a third speed regulating part is arranged on the top of the residence tank, and a plurality of stirring parts are arranged in the residence tank. The first conveying part and the second conveying part convey mixed materials into the residence tank and stir the mixed materials through the stirring parts, so that the mixed materials are stirred, reacted and conveyed. The plurality of stirring parts in the residence tank are symmetrically distributed and the shafts of the stirring parts can rotate in the same or opposite directions. The third speed regulating part drives the stirring parts to stir at variable speeds, so that the chaotic reinforcement is realized. The technology and the complete equipment have the advantages of compact layout, low investment, small occupation area and high automation degree. Under the chaotic reinforcement, the complete equipment has the advantages of uniform mass and heat transfer, less scaling, high efficiency, shortened reaction time and reduced reaction temperature.

The utility model provides an auxiliary butt joint device of multiple connectors, comprising a butt joint assembly, a second surface of which is provided with a plurality of first connectors; the first surface of the base assembly is provided with a second connector matched with the first connector; the auxiliary butt joint assembly comprises two sets of transmission matching structures and horizontal driving mechanisms which are symmetrically arranged, the transmission matching structures are arranged on the second surface of the butt joint assembly and located on the two sides of the first connector, and the horizontal driving mechanisms are arranged on the first surface of the base assembly, located on the two sides of the second connector and correspond to the transmission matching structures; the horizontal driving mechanism acts on the transmission matching structure through horizontal movement, converts horizontal driving force into acting force in the vertical direction, and drives the butt joint assembly to vertically move relative to the base assembly, so that butt joint or separation of the first connector and the second connector is achieved. By ingeniously applying a mechanical transmission principle, a larger acting force of the connector is converted into a smaller push-pull force which is convenient for manual operation.

This invention discloses a dual-frequency splicable passive reflector array and its design method, mainly addressing the problems of large size of passive transponders and difficulty in achieving simultaneous aperture beam adjustment in existing blind zone coverage technologies. The designed dual-frequency splicable passive reflector array consists of an array of multiple reflector array elements, including two types of subarrays: "0" and "1". Based on the principle of average phase gradient, M... s A subarray of "0"s and N s The "1" subarrays are arranged in an orderly manner to form the smallest periodic row vector V in the reflection array. min By changing V min M s and N s The number of subarrays and their arrangement order determine beam reconfigurability, using the minimum periodic row vector V. min By extending the array in both the elevation and azimuth planes, different apertures of the splicable reflective arrays can be obtained, achieving aperture reconfigurability and enabling its use in millimeter-wave blind spot filling in wireless communication.

This utility model relates to the field of mechanical manufacturing technology, specifically disclosing an adjustable impact force nail driver. It includes a housing, a first cylinder, a cover, a working piston, and a piston rod connected to the working piston. The housing, the first cylinder, and the cover form a first air chamber above the working piston to store high-pressure gas. It also includes an air replenishment device disposed on the cover, which maintains the air pressure in the first air chamber at the working pressure through the movement of the working piston. The key feature is that the cover also has a pressure regulating device, which includes a valve body, a valve rod, a pressure regulating core, and a pressure regulating spring. The valve body is connected to the cover and has an opening / closing port. The valve rod is axially movable and mounted in the valve body, cooperating with the opening / closing port. This solves the problems of gas leakage leading to reduced air pressure and the inability to adjust the impact force in existing technologies, improving operational efficiency and ease of use.

The invention relates to a low-temperature multi-directional forging process and device for an alloy material. The low-temperature multi-directional forging process comprises the steps that S1, the device is assembled; s2, preparing a low-temperature medium solution; s3, placing and compressing the forging blank; s4, liquid nitrogen cooling and temperature control; and S5, multi-pass compression forging is conducted. The alcohol-water mixed solution is used as a cooling medium, the temperature stability of the alloy material in the multidirectional forging process is guaranteed by means of the freezing point temperature, and the continuity of the low-temperature state in the forging process is guaranteed; refining of material grains can be effectively promoted through low-temperature multidirectional forging, the mechanical property of the alloy is improved, and the tensile strength and the yield strength are improved.