157 results about "Energy leakage" patented technology

Methods for co-designing transformer-accelerator pairs are provided. The methods may include using a transformer embedding to generate a computational graph and a transformer model. The methods may include running the computational graph through a surrogate model and outputting accuracy data of the surrogate model. The methods may include using an accelerator embedding and the transformer model to simulate training and inference tasks and outputting hardware performance data of the transformer model. The methods may include sending the hardware performance data (such as latency, energy leakage, dynamic energy, and chip area, which may be optimizable performance parameters) and model accuracy data to a co-design optimizer. The methods may include generating an output transformer-accelerator or a transformer-edge-device pair from the co-design optimizer. The transformer model and accelerator embedding may be the output transformer-accelerator or a transformer-edge-device pair.

The invention relates to the technical field of annealing furnaces, in particular to a swirl injection type energy-saving annealing furnace. The device comprises outer shell plates and an air duct, the outer shell plates are spliced to form a hearth, the air duct is arranged in the outer shell plates to form an air path for convective circulation, the air duct is connected with a circulating fan, and air in the air duct and an inner cavity of the hearth is driven by the circulating fan to actively convectively circulate. The air direction of air convection circulation of the air channel faces the side face and the lower portion of the workpiece needing annealing, and a heat preservation layer is attached to the inner surface of the outer shell plate. The shell plate is used for supporting a main body structure of the furnace body, the air duct is used for achieving circulation convection of air flow, the annealing efficiency and the annealing quality of the metal coiled materials are improved through circulation convection of high-temperature air flow, the heat preservation layer is used for storing internal heat, reducing energy leakage and effectively reducing loss, and the circulation fan is used for providing power for circulation convection of the air flow.

Provided in the present invention are a surface acoustic wave resonator and a manufacturing method therefor. An interdigital transducer comprises a plurality of interdigital electrodes and two busbar groups connected to the interdigital electrodes. In each busbar group, a busbar close to an interdigital electrode is arranged at an angle relative to the normal direction of the interdigital electrode, thereby enabling the lateral mode to be inhibited. Furthermore, one end of the interdigital electrode is provided with a mass block, thereby enabling the sound velocity at the end of the interdigital electrode to be reduced. Furthermore, each busbar group comprises at least two busbars, and adjacent busbars are connected, so that energy can be limited in a resonant cavity, inhibiting energy leakage, ultimately resulting in a significant increase in the quality factor.

The invention discloses a wind power blade structure health monitoring method based on multi-field decoupling optical fiber sensing, particularly relates to the technical field of wind power equipment state monitoring, and is used for solving the problem of health state misdiagnosis caused by coherent interference of environmental noise and damage signals. The method comprises the following steps: collecting vibration, strain and temperature signals and generating a background noise vector; calculating a frequency domain coherence function of the vibration signal and the noise vector to identify an interference danger frequency band; analyzing the polarization angle distribution of the vibration signal in the frequency band, and inverting the physical path topology of the noise transmitted into the blade; when the path passes through a predefined weak area, improving a damage weight coefficient of a strain signal of a corresponding frequency band and carrying out Hilbert phase shift reconstruction to generate an anti-interference strain feature vector; calculating the energy dissipation rate of the vector in a dangerous frequency band, and judging an energy leakage event caused by damage by combining a viscoelastic constitutive threshold value of the composite material; the damage type and the spatial position are judged according to the time domain correlation between the energy leakage event and the temperature signal, and the hidden damage detection reliability is improved.

The invention discloses a multi-loop natural circulation coupling heat removal experiment system, which relates to the technical field of nuclear reactor safety, and is characterized by comprising an integrated pressure vessel, an energy conversion and residual heat removal integrated design loop, a condenser cooling water loop, a thermal insulation material and a measuring instrument, the heat insulation material coats the heat extraction experiment system and is used for reducing energy leakage; and the measuring instrument is arranged on the heat extraction experiment system and is used for measuring and monitoring the flow, the temperature, the pressure and the liquid level. Research is carried out on an integrated pressure container designed in a marine nuclear power source and an energy conversion and waste heat removal integrated system, and three natural circulations are formed in a secondary loop and a condenser seawater section in the integrated pressure container respectively; all natural circulations are coupled into a whole through a steam generator heat transfer pipe and a condenser heat transfer pipe, and waste heat of a reactor core is discharged through coupling of multiple natural circulations, so that shutdown safety of a nuclear reactor is guaranteed.

The invention belongs to the technical field of microelectronic devices, and particularly relates to a high-performance surface acoustic wave device and a preparation process thereof. Comprising the following steps: preparing a polycrystalline diamond film layer on a low-resistance silicon substrate; preparing a temperature compensation layer on the polycrystalline diamond film layer; helium ions are injected into the bulk piezoelectric precursor to form a piezoelectric film layer to be transferred; the bulk piezoelectric precursor is bonded to the temperature compensation layer through a bonding technology, the piezoelectric film layer is reserved in a heat treatment mode, and a piezoelectric layer is obtained; preparing an interdigital electrode on the surface of the piezoelectric layer; and preparing a protection layer on the surface of the interdigital electrode and the non-designated area of the low-resistance silicon substrate, and etching the low-resistance silicon substrate on the designated area. According to the method, the polycrystalline diamond film layer is prepared on the low-resistance silicon substrate, the polycrystalline diamond film layer has high sound velocity and can restrain energy from leaking to the substrate, and the low-resistance silicon in the designated area is etched to reduce the radio frequency loss of the device, improve the quality factor of the surface acoustic wave device and improve the performance of the surface acoustic wave device.

The utility model relates to an energy discharge circuit of an inspection robot. The energy discharge circuit is applied to a main circuit sequentially connected with a battery pack and a motor. A switching circuit and an energy release circuit are connected in the main circuit, the switching circuit is sequentially connected with a first voltage control switch and a current control switch, the energy release circuit is sequentially connected with a second voltage control switch and an energy release resistor, and the current control switch is connected with the second voltage control switch. When the motor accelerates downhill and loses braking capacity to cause increase of reverse electromotive force, the motor charges the battery pack within a safe voltage range; when the voltage exceeds a safety range to turn on the first voltage control switch, the switching circuit is electrified to turn on the current control switch, and the current control switch controls the second voltage control switch in the energy release circuit to turn on, so that most of energy in the reverse electromotive force is released by the energy release resistor in the energy release circuit, and the energy release effect is improved. The battery pack is prevented from being damaged.

An electric leakage protection system includes: a first Y capacitor and a second Y capacitor connected in series; a power battery, wherein a positive electrode of the power battery is connected to a first end of the first Y capacitor and the second Y capacitor which are connected in series, and a second end of the first Y capacitor and the second Y capacitor which are connected in series is separately connected to a negative electrode of the power battery and a negative electrode of a DC charging port; and a controller configured to: when acquired electric leakage-related parameters meet preset electric leakage protection conditions, control an energy leakage loop to avoid an electric shock.

Embodiments of this application provide a surface acoustic wave filter, an apparatus, and an electronic device. The surface acoustic wave filter includes a support substrate, a first acoustic velocity layer is disposed above the support substrate, a material of the first acoustic velocity layer is silicon dioxide, a piezoelectric layer is disposed above the first acoustic velocity layer, Euler angles of a cut of the piezoelectric layer are (-5° to 5°, 81° to 83°, 85° to 95°), and an interdigital electrode is disposed above the piezoelectric layer. A second acoustic velocity layer may be further included between the first acoustic velocity layer and the support substrate; and a material of the second acoustic velocity layer is aluminum nitride or silicon nitride, where a longitudinal wave acoustic velocity in the first acoustic velocity layer is lower than a longitudinal wave acoustic velocity in the piezoelectric layer, and a longitudinal wave acoustic velocity in the second acoustic velocity layer is higher than the longitudinal wave acoustic velocity in the piezoelectric layer. According to the surface acoustic wave filter provided in embodiments of this application, leakage of energy of a surface acoustic wave can be suppressed, and spurious modes can be reduced.

The absorber is formed by periodically arranging a plurality of absorption structure units, each absorption structure unit comprises a SiO2 substrate, a Ti metal layer and two Si3N4 regular hexagonal prisms which are coaxially arranged from bottom to top, and the embedded body which is coaxially arranged in the Si3N4 regular hexagonal prism at the bottom layer; the embedded body comprises an MgF2 regular hexagonal prism on the outer layer, a Cr metal circular ring on the middle layer and a TiO2 regular hexagonal prism on the inner layer. When the MgF2 regular hexagonal prism is internally tangent to the Si3N4 regular hexagonal prism at the bottom layer, the Cr metal circular ring is internally tangent to the MgF2 regular hexagonal prism, the TiO2 regular hexagonal prism is internally tangent to the Cr metal circular ring, and the top point of the bottom surface of the Si3N4 regular hexagonal prism at the top layer coincides with the midpoint of the edge of the top surface of the Si3N4 regular hexagonal prism at the bottom layer, it is ensured that an electromagnetic field / sound field is uniformly coupled between structural units, energy leakage or too high local field intensity is avoided, and the electromagnetic field / sound field is effectively improved. The coverage range of absorbed waves is 800-2800nm, and is not influenced by incident energy polarization, so that the application range is wide; structural unit layout facilitates accurate alignment, manufacturing difficulty and cost are reduced, and mass production, popularization and application are easy.

The invention provides a formal security verification method for a password energy side channel before silicon. The method comprises the following steps: establishing an information flow security model library for circuit design by adopting a gate-level information flow tracking technology; converting the password core design into a gate-level netlist, mapping each basic logic unit in the gate-level netlist into an information flow security model library for matching, and obtaining an energy side channel security model; summarizing target function attributes by analyzing structural characteristics of a cryptographic algorithm and characteristics of an energy side channel; performing simulation verification on the energy side channel security model by taking the target function attribute as a constraint so as to determine a target register; based on the energy consumption model, in combination with the energy side channel security model, performing security attribute mining of the energy side channel; and according to the security attribute and the energy side channel security model, analyzing whether the target register has energy leakage or not by adopting a formalized verification method. According to the method, accurate analysis of the password core design energy side channel security can be well realized.

The invention relates to the technical field of semiconductors, in particular to an acoustic resonator, an acoustic filter and an acoustic filter module. The acoustic resonator at least comprises a piezoelectric film and an interdigital electrode; a preset crystal axis in the piezoelectric film serves as a first reference axis, the normal direction of the interdigital electrode pair serves as a second reference axis, and a preset included angle is formed between the first reference axis and the second reference axis; the average tangential direction of the first gap track and the average tangential direction of the second gap track in the interdigital electrode meet a preset condition. The electromechanical coupling coefficient of the acoustic resonator is adjusted by changing the acoustic wave propagation direction in the acoustic wave surface. Moreover, by designing a first gap track tangential angle and a second gap track tangential angle, the electromechanical coupling coefficient of the acoustic resonator is changed, and energy leakage caused by an overlarge energy flow incident angle is avoided. Therefore, acoustic wave resonators with different electromechanical coupling coefficients can be realized on the same piezoelectric film, and then acoustic wave filters with different relative bandwidths are realized.

The application discloses a kind of plasma high-pressure ignition device, it is related to electronic detonator initiation technology adjacent area, to solve the technical problem of low ignition power, energy leakage is serious, low airtightness of traditional ignition device, provide a kind of energy concentration, airtightness strong plasma high-pressure directional ignition device.The core structure includes high-pressure ignition module, semiconductor bridge, fuse, test hole, sealing wrapping layer and integrated metal tube shell.The igniter adopts integrated structure design, and high-pressure ignition module, semiconductor bridge and explosion-proof protection module are integrated;By using high-temperature resistant sealant to fill the gap between the metal tube shell, a pressure environment above 0.5MPa is achieved to prevent leakage;The device can be widely used in gas turbine, aerospace thruster, oil drilling equipment and other high-pressure scene ignition system, with reliable sealing, stable structure, easy assembly.

The utility model provides a heat pump type constant temperature and humidity machine which comprises a machine body and a sealing door, the sealing door is rotatably connected with the machine body through multiple sets of hinges to form a containing cavity, two sets of sliding rails are arranged in the containing cavity, multiple sets of electric sliding blocks are arranged on the sliding rails, a containing frame is arranged in the containing cavity, and the containing frame is connected with the multiple sets of electric sliding blocks. An isolation assembly is arranged in the containing cavity, a first storage cavity and a second storage cavity are formed in the containing cavity through the isolation assembly, and the sliding rail is arranged in the first storage cavity and the second storage cavity in a penetrating mode. According to the constant-temperature and constant-humidity machine, the containing cavity is divided into the first storage cavity and the second storage cavity through the isolation assembly, the two sets of sliding rails are arranged in the containing cavity, and the containing frame can move along the sliding rails through the electric sliding blocks and can move back and forth in the first storage cavity and the second storage cavity, so that when electronic products are taken and placed, the electronic products can be taken and placed conveniently. The storage cavity which is not operated can keep good leakproofness, energy leakage is reduced, and therefore energy waste is reduced.

The present invention discloses a surface acoustic wave resonator and filter. The resonator comprises an interdigital structure comprising a first interdigital region and a second interdigital region; the first interdigital region comprises a plurality of first fingers, and the second interdigital region comprises a plurality of second fingers; a reflective grating disposed on either side of the interdigital structure in a first direction, the reflective grating being coplanar with the plurality of first fingers and the plurality of second fingers; the reflective grating and the plurality of first fingers intersecting perpendicularly with each other, and the reflective grating and the plurality of second fingers intersecting perpendicularly with each other; in the first direction, each first finger is arranged opposite each second finger, with a gap formed between the first and second fingers; in the second direction, the plurality of first fingers are arranged in parallel, and the plurality of second fingers are arranged in parallel; the first direction is perpendicular to the second direction. The present invention can reduce lateral energy leakage in the first direction and suppress high-order spurious modes of the surface acoustic wave resonator in the first and second directions.

This document describes techniques and systems for planar surface features for waveguides and antennas. Two structures are arranged with opposing planar surfaces fixed adjacent to a separation plane dividing a channel (e.g., a waveguide, a feed network) to provide an energy path for propagating electromagnetic energy. Part of the channel is formed between side walls of a recessed groove within one opposing surface; another channel part is formed by an arrangement of surface features spaced and shaped on the other opposing surface. At least two surface features are adjacent protrusions contoured to compliment the sidewalls of the recessed groove. An area on each opposing surface between the recessed groove and the adjacent protrusions is configured to form the energy path through the channel including to prevent energy leakage from the separation plane dividing the channel.

The invention discloses a surface acoustic wave resonator and electronic equipment, and belongs to the technical field of surface acoustic wave devices. The surface acoustic wave resonator includes: a piezoelectric layer; the interdigital transducer is arranged on one side of the piezoelectric layer, the interdigital transducer comprises two interdigital electrodes which are oppositely arranged in the first direction, each interdigital electrode comprises a bus bar, a first interdigital and a second interdigital, and the first interdigital and the second interdigital are connected with the bus bar and extend in the first direction; the first interdigitals and the second interdigitals on the same interdigital electrode are alternately arranged along a second direction intersected with the first direction, and the first interdigitals and the second interdigitals on the two interdigital electrodes are oppositely arranged and have gaps; the length of the first interdigitals is greater than that of the second interdigitals, the first interdigitals at least extend along the second direction in a virtual gap region to form an additional phase shift element, and the virtual gap region is a region corresponding to the gap and extending along the second direction. Transverse energy leakage of the surface acoustic wave can be reduced, and the performance of the surface acoustic wave resonator can be improved.

The invention discloses a conformal leaky-wave antenna, and belongs to the technical field of microwave device communication. According to the invention, the problems of insufficient conformal adaptive capability, poor stability, poor beam scanning capability and the like of the conformal leaky-wave antenna are solved. The upper surface of the upper PI substrate is etched by flexible copper foil and is provided with a Vivaldi unit and metal branch knot combined structure periodically distributed on the outer side of an SSPP transmission line in a staggered mode, the lower surface of the lower ABS substrate is completely covered with a metal grounding layer, and a closed guided wave channel is formed. When a radio frequency signal is input from a feed port, electromagnetic waves are spread along the wave guide structure in the PI substrate, directional radiation is realized through energy leakage of periodic metal branch gaps, and meanwhile, the antenna can realize stress-free conformal on a curved surface carrier by utilizing the excellent flexibility characteristic of a PI material; and the periodic design of the radiation structure and the effect of Vivaldi coupling enable the wave beam to realize continuous frequency sweeping from-71 degrees to 42 degrees.

The present invention relates to a multi-port hybrid DC circuit breaker for realizing busbar and line fault isolation. The topological structure of the multi-port hybrid DC circuit breaker includes: n load transfer switches; n fast disconnecting switches; n residual current switches; n current limiting reactors; 1 main disconnecting switch; n energy discharge branches; n thyristor branches; the n load transfer switches and the fast disconnecting switches constitute the current-carrying branches of n lines; the energy discharge branches are anti-parallel thyristors and energy discharge resistors R c The present invention is scientifically and reasonably designed, integrating n dual-port hybrid DC circuit breakers on n lines into a multi-port hybrid DC circuit breaker, greatly reducing the number of power electronic devices and having good economic performance; in addition, the existence of the energy discharge branch in the multi-port hybrid DC circuit breaker shortens the fault isolation time and reduces the energy discharge demand of the MOV.

This invention discloses a design method and structure for a half-mode dielectric ridge parallel plate waveguide dual-beam wide-angle scanning leaky antenna based on PCB technology. Manufactured using a fully printed circuit board process, it includes a core structure of a half-mode dielectric ridge parallel plate waveguide transmission line formed by laminating three dielectric substrates, a metallized via array disposed at the edge of the waveguide's non-radiating open aperture to suppress energy leakage, and a periodic dipole array symmetrically arranged on the radiating open aperture side of the waveguide. This invention solves the technical problems of high manufacturing cost, narrow scanning range, and difficulty in implementing dual beams in traditional leaky antennas, providing a low-cost, high-performance, and easily integrated antenna solution.

The invention provides a bulk acoustic wave resonator, a filter and a duplexer for improving a Q value and a preparation method thereof, and relates to the technical field of bulk acoustic wave resonators. Comprising a substrate, a bottom electrode, a piezoelectric layer and a top electrode which are sequentially stacked in the longitudinal direction, a cavity is formed between the substrate and the bottom electrode, single-protrusion frame structures are arranged between the edges of the two sides of the piezoelectric layer in the transverse direction and the top electrode, and the portions, close to the edges, of the frame structures are arranged in an overhead mode and form an air bridge structure communicated with the outside with the piezoelectric layer. The bulk acoustic wave resonator for improving the Q value aims at solving the problem that an existing single-protrusion and double-protrusion frame structure is poor in Lamb wave leakage suppression effect or large in machining process difficulty, it is guaranteed that the process is simple, Lamb wave transverse energy leakage is effectively suppressed, and therefore the Q value is improved.

The invention relates to the technical field of stress relieving devices, and discloses a device and method for relieving welding residual stress of a super-thick non-ferrous metal part, the device comprises an explosion tank and a hardening container, and explosion impact is generated in the explosion tank to conduct residual stress relieving on a metal workpiece in the hardening container; a guide channel is formed in the hardening container, a self-adaptive channel is formed in the guide channel, the self-adaptive channel can be adjusted in a user-defined mode so as to correspond to the welding seam shape of the metal workpiece, a conduction channel for explosive impact to pass through is formed in a gap between the two sets of flexible clamping plates, and the explosive impact is conducted to the welding seam of the metal workpiece through the conduction channel. A directional conduction channel is formed through the gaps of the flexible clamping plates, shock wave energy is efficiently focused on a welding seam, stress is accurately eliminated, energy scattering is avoided, the anti-explosion stability is achieved, the flexible clamping plates made of metal woven materials have the impact resistance and the flexible deformation capacity, the sealing performance of the channel is maintained under high-pressure explosion, and energy leakage is prevented.

The invention discloses an array antenna which comprises a radiation layer, and a plurality of radiation slots are formed in the radiation layer. The cavity layer is arranged below the radiation layer, and the cavity layer comprises at least one coupling slot; and the feed layer is arranged below the cavity layer, a feed network is arranged on the feed layer, and the feed network comprises at least one ridge gap waveguide. According to the array antenna, the gap waveguide transmission line which is low in loss and does not need electric contact is used as the feed network of the antenna, the high-order mode resonant cavity can provide higher flexibility, a more compact structure and lower loss, the top layer is the loaded radiation gap of the rectangular groove, and the antenna is more compact in structure. The design of the groove can reduce the loss of energy at the gap and the leakage of non-radiation energy, and realizes the performance improvement of high gain, low loss and wide band of the miniaturized plane millimeter wave array antenna.

The invention discloses a high-Q-factor MEMS (Micro Electro Mechanical System) beam resonator with a periodic ripple boundary, and belongs to the field of micro electro mechanical system resonator design. According to the structure, periodic corrugation modulation is introduced into the side wall of a traditional straight beam, a plurality of periodic corrugation units are symmetrically arranged on the boundary of the side wall of a beam body, a corrugation boundary contour curve is defined by a parameterization function, the modulation amplitude and period are adjustable, the beam width is continuously and periodically changed in the length direction, and therefore thermoelastic damping and anchor point loss are reduced at the same time. The corrugated boundaries are integrally and symmetrically arranged and can be directly processed and formed by an SOI (Silicon On Insulator) process, the structure manufacturability is high, and additional assembly is not needed. Under the driving of electrostatic force, the resonator forms more uniform strain distribution and a limited heat flow channel in fundamental mode vibration, so that the energy leakage is obviously weakened, and the resonance quality factor is further improved. The structure is suitable for high-Q-factor demand scenes such as high-sensitivity MEMS sensors, low-noise oscillators and microfilters.

The invention belongs to the technical field of radio and microwaves, and discloses a microwave amplitude limiting device capable of removing peak leakage. According to the invention, through skillfully combining the coupling and resonance principles, quick response can be realized at the moment when a strong signal arrives, and the time window of energy leakage is obviously reduced. Compared with a traditional microwave amplitude limiter, the microwave amplitude limiter has the advantages that the response speed is higher, the response to strong signals can be made in an extremely short time, and therefore the risk of sharp point leakage is greatly reduced; the device provided by the invention is high in design flexibility, and can be optimized and adjusted according to different working frequency bands and signal characteristics so as to adapt to diversified application scenes; the device is compact in structure and can be easily integrated into an existing receiving link, large-scale transformation of the system is not needed, and the overall reliability and stability of the receiving link are further guaranteed.

The utility model provides hydrogen filling equipment for hydrogen energy production, and belongs to the technical field of hydrogen energy production and manufacturing. The hydrogen filling equipment for hydrogen energy production comprises a hydrogen filling equipment body and an operation protection mechanism, a pressure gauge is installed on the top of the front side of the hydrogen filling equipment body, a control switch is installed on the front side of the top of the hydrogen filling equipment body, and a protection frame is movably connected to the front side of the top of the hydrogen filling equipment body; the bottoms of the two sides of the protection frame are fixedly connected with connecting columns, the connecting plate is movably connected to the bottoms of the connecting columns, the operation protection mechanism is arranged so that the control switch can be covered and protected when not in use, the situation that the control switch is accidentally touched and influenced by external objects or workers when not in use, misoperation occurs is avoided, and the service life of the control switch is prolonged. Therefore, the stability and the safety of the hydrogen filling equipment body in operation and use are improved.

The present invention belongs to the field of surface acoustic wave technology. The present invention provides an acoustic wave resonator and a filter. The acoustic wave resonator includes a piezoelectric substrate, a functional layer and a temperature compensation layer stacked in sequence; the functional layer includes an interdigital transducer and a reflector; the acoustic wave resonator also includes an elliptical metal ring, which is arranged above the interdigital transducer and has a first interval with the plane where the surface of the interdigital transducer is located. The present invention creates different sound speed zones in the gap area of ​​the interdigital transducer by arranging an elliptical metal ring with adjustable geometric and dimensional features above the interdigital transducer of TC‑SAW, thereby effectively suppressing stray modes, preventing lateral energy leakage, and improving the waveguide capability and the quality factor of the resonator.

The present invention belongs to the technical field of surface acoustic waves. The present invention provides a TC-SAW resonator and a filter containing the same. The TC-SAW resonator includes a piezoelectric substrate, a functional layer including an interdigital transducer, and a temperature compensation layer which are stacked in sequence; it also includes two pairs of bimetallic strips arranged above the interdigital transducer, and each pair of the bimetallic strips includes a busbar edge metal strip and an active area metal strip. In the orthographic projection to the functional layer, one side edge of the busbar edge metal strip fits with one side edge of the corresponding busbar, and is arranged in the gap area of ​​the interdigital transducer; the active area metal strip has a portion overlapping with the active area of ​​the interdigital transducer. By providing a new structure of bimetallic strips, the sound velocity of the gap area can be adjusted, so that the waveguide capacity is improved, and the stray mode is effectively suppressed to prevent lateral energy leakage, thereby improving the quality factor of the resonator.

The invention provides a holographic metasurface antenna which adopts a three-layer parallel plate waveguide structure and comprises a dielectric substrate, an upper metal plate and a lower metal plate. A cross slot unit array in matrix arrangement is etched on the upper metal plate, and each unit comprises orthogonal transverse slots and vertical slots to realize circular polarization. The metal through hole array is composed of a plurality of hollow cylindrical through holes and surrounds the gap array layer, and energy leakage is effectively reduced. According to the design, the gain of the antenna is increased by 1.23 dB, the antenna has the characteristics of low profile and small size, and beam forming can be realized without a complex feed network.

The utility model belongs to the technical field of hydrogen energy, and particularly relates to a hydrogen energy storage device which comprises a hydrogen storage cylinder, fixing rings and an elastic plate, the fixing rings are symmetrically and fixedly connected with the outer wall of the hydrogen storage cylinder, and sliding blocks are slidably connected to the outer walls of the fixing rings in an array mode. Partition plates are symmetrically and fixedly connected to the outer wall of the fixing ring and located between the two sliding blocks, first spring columns are symmetrically and fixedly connected to the two sides of each sliding block, and the sliding blocks are elastically connected with the partition plates through the first spring columns. The hydrogen storage cylinders with different filling port positions can be erected, so that the occupied space in the transportation and carrying process is saved, rolling of the hydrogen storage cylinders caused by transverse arrangement of the hydrogen storage cylinders can be prevented, impact force borne by the hydrogen storage cylinders when the hydrogen storage cylinders are collided is eliminated and buffered, energy leakage caused by breakage of the cylinders is further prevented, and the hydrogen storage cylinders are prevented from being damaged. And pressurization caused by great shaking of energy in the bottle is avoided.