481 results about "Square cavity" patented technology

The invention discloses a wide band low profile flat plate slot array antenna which comprises wide band low profile flat plate slot antenna units and waveguide feed networks. Each wide band low profile flat plate slot antenna unit comprises a radiating square cavity, radiating slots, a stimulating waveguide cavity, a stimulating slot and a feed waveguide, wherein each waveguide feed network is composed of a plurality of equal-power-dividing and unequal-power-dividing waveguide H-T power dividers and connected with each power feeding waveguide, and the waveguide feed networks and the power feed waveguides are located in the same layer. Signals enter the feed waveguides through the waveguide feed networks and are transmitted to the stimulating waveguide cavities through the stimulating slots, the radiating slots enable the signals to be coupled out from the stimulating waveguide cavities, and then the signals are radiated to the free space through the radiating square cavities. The wide band low profile flat plate slot array antenna has the advantages of being wide in band, high in efficiency, low in profile and easy to machine, and is capable of being expanded to be a single pulse antenna after being combined with a comparator.

Improved functionality of phase change materials (PCM) through dispersion of nanoparticles is described. The resulting nanoparticle-enhanced phase change materials (NEPCM) exhibit enhanced thermal conductivity in comparison to the base material. Starting with steady state natural convection within a differentially-heated square cavity that contains a nanofluid (water plus copper nanoparticles), the nanofluid is allowed to undergo solidification. Partly due to increase of thermal conductivity and also lowering of the latent heat of fusion, higher heat release rate of the NEPCM in relation to the conventional PCM is observed. The predicted increase of the heat release rate of the NEPCM is a clear indicator of its great potential for diverse thermal energy storage applications.

The invention discloses a complementary power supply system of movable wind generation, solar generation and vehicle starting/generation, comprising a loading vehicle, a wind generating unit, a solar cell array, a storage system (super capacitor), a vehicle starting/generator and a power square cavity. The generating system is flexible to move and convenient to stretch, is particularly suitable for being applied to departments with long-term field mobile operation and can fully utilize renewable energy sources to reduce the dependence on fuel as much as possible, and provides electric power safeguard of the field operation.

The invention relates to a highly miniaturized substrate integrated waveguide resonator which comprises a first metal copper-coated layer, a first medium layer, a second metal copper-coated layer, a second medium layer and a third metal copper-coated layer which are successively overlaid from top to bottom, wherein a metalizing through hole is connected with the third metal copper-coated layer after successively penetrating through the above interlayer to form an upper group of overlaid square cavities and a lower group of overlaid square cavities; in the second metal copper-coated layer, one group of C-shaped slots penetrating through the second metal copper-coated layer is arranged close to the metalizing through hole corresponding to the position of the square cavities; two microstrip lines are respectively connected close to two ends of the C-shaped slots; two sides of the microstrip line, which are close to one ends of the C-shaped slots, are respectively provided with a coupling slot penetrating through the second metal copper-coated layer; the coupling slot is connected with the C-shaped slots; and the metalizing through hole is broken on the positions of the microstrip lines and the coupling slots. The high-density miniaturized substrate integrated waveguide resonator has the beneficial effect that the traditional substrate integrated waveguide resonator structure is folded so as to greatly reduce the circuit area of the existing resonator, and highly miniaturization is realized.

The present disclosure provides a vacuum apparatus for miniaturizing an atomic interferometer. The appratus includes an upper window, a lower window, a square cavity, a connecting member, an atomic source component, a three-dimensional magneto-optical trap component, an interference component, and a detecting component. Fasteners matched with the upper and lower windows are sealed with thick glasscoated with anti-reflection coating on both faces, and systematic errors caused by wavefront distortion effects can be greatly reduced. Optical windows beyond the upper and lower windows are reasonably designed and are directly embedded into a vacuum chamber in a welded manner, a reasonable atomic cooling interference solution is adopted, and the vacuum apparatus are greatly reduced in size and weight and is simple and reliable in structure. A vacuum structure is properly modified and is also suitable for applications such as cold atomic gyroscopes, gravity gradiometers and the like.

The present invention discloses a single-chamber microfiltration membrane self-mediator coupling type microbial fuel cell, comprises a single-chamber type cell body, an anode plate, a cathode plate and a top cover, wherein, the single-chamber type cell body is in a square cavity structure; the cathode plate consists of a micropore filter layer, a catalyst layer, a carbon paper base layer and a waterproof layer which are connected in order; the micropore filter layer is a hydrophilic microfiltration membrane with micropores; the catalyst layer is the mixture of platinum catalyst and carbon powder, which covers one side of the carbon paper base layer in contact with solution inside the cell body; the other side of the carbon paper base layer in contact with air is plastered with 2-3 polyfluortetraethylene thin coatings so as to form the waterproof layer. The device of the present invention can have a plurality of anode plates placed inside and flexibly adjust the relative distance between the anode plates and an anode. In the whole operation process, the system does not need to keep strict anaerobic environment. The cell is simple in structure, cheap in material, flexible to operate, fast to charge/discharge, stable in performance and capable of constantly and efficiently purifying sewage and producing electric energy which can be directly utilized.

The invention discloses automatic reaction device and method for pretreating cells. The device comprises a reaction box body, a base, a box cover and a piston, wherein a middle cavity is formed in the center of the reaction box body; seven cavities are formed in the periphery of the hollow cavity; seven square cavities are correspondingly formed between the middle cavity and the seven cavities in the periphery; a control valve is put into each square cavity; communication between an inner chamber and an outer chamber is controlled through up and down movement; the lower part of the reaction box body is tightly connected with the base; the box cover is arranged at the upper part of the reaction box body; a piston rod which is matched with the middle cavity penetrates through the box cover; and the outer side of a second PCR reagent cavity is connected with a PCR chip for detecting nucleic acid. According to the reaction device and method, crushing and cracking of original samples, and purifying and extracting of the nucleic acid and PCR amplification are integrated in a reaction box; the operation process is simplified; the pretreatment efficiency is greatly improved; meanwhile, the reaction volume is reduced; the portability of an instrument is improved; and a foundation is laid for rapid, safe and accurate nucleic acid detection.

A wall building and painting device comprises columns, an operating platform, a building trough, bases, lifting mechanisms and power mechanisms, wherein the cross section of each column is in the shape of a hollow square cavity with arc edges at four corners, a slide way integrally connected with an inner cavity of each column is arranged on one face of the column from bottom to top, an actuating arm integrally connected with the operating platform and a support frame of the building trough is mounted in the inner cavity of each column, one actuating arm forms optional one of the lifting mechanisms with a chain, a screw or a hydraulic lifter, the support is fixed on portions of the actuating arms of the lifting mechanisms extending out of the columns through bolts. The wall building and painting device comprises two sets of lifting mechanisms using columns for support and the support frame, the operating platform is mounted on the lower portion of a frame of the support frame on the same side of the two columns, and the building trough perpendicular to the horizontal plane is fixed on the other side of the two columns. The wall building and painting is applicable to building a wall between an upper-floor room and a lower-floor room, work amount of line adjustment, leveling and erection of a scaffold during construction can be reduced, painting is performed during building, and work efficiency and building quality are improved.

The invention relates to a rotating mechanism for a spatial two-dimensional antenna. A first frame is in a cross orthogonal structure marked respectively as an axis X and an axis Y. Directions of support arms at both ends of the axis X and the axis Y are opposite. The section of a support is in a U-shaped structure and the support is placed in the support arms at both ends of the axis X of the first frame to form a square cavity. A rotating unit connecting interface of the support is connected with a transmission connecting interface of the axis X. The section of the second frame is a U-shaped structure. Both ends of the support arms of the second frame are placed outside the support arms of the axis Y of the first frame to form a square cavity. A transmission connecting interface of the second frame is connected with a rotating unit connecting interface of the axis Y of the first frame. The output shafts of the two rotating units are respectively connected with the rotating unit connecting interfaces in the two square cavities as the driving parts of the axis X and the axis Y. Two rotating shafts respectively penetrate through the rotating support interfaces in the two square cavities. One ends of the rotating shafts are fixed on the internal walls of the square cavities via flanges. The retainer rings are placed in the middle of the two bearings and then mounted on the rotating shafts outside the square cavities in sequence and clamped by end covers.

The invention discloses an assembling device of a piston ring. The assembling device of the piston ring comprises a supporting frame and a piston ring stretching assembly. A V-shaped supporting plate used for supporting a piston of the piston ring to be assembled is arranged above the supporting frame. The piston ring stretching assembly comprises an installation base, a stretching air cylinder and two positioning blocks, wherein the installation base is of a square cavity, the two sides of the bottom end of the square cavity are provided with telescopic piston rods respectively, the stretching air cylinder comprises an air cylinder barrel and two air cylinder sleeves, the air cylinder sleeves are arranged at the two ends of the air cylinder barrel in a sliding fit mode respectively, the air cylinder sleeves are movably installed in the square cavity, the side wall of each air cylinder sleeve is provided with an upper step portion and a lower step portion, the ends of the two piston rods are correspondingly connected to the lower step portions in an abutting mode respectively, the two piston rods can drive the two air cylinder sleeves to be close to each other, the two positioning blocks are detachably arranged on the corresponding upper step portions respectively, the upper surface of each positioning block is provided with at least one fixing groove, hooks are arranged outside the fixing grooves, and the hooks on the two positioning blocks can be clamped into an opening of the piston ring at the same time. The assembling device can assemble multiple kinds of piston rings.

A miniaturized heat-resistant and high-dynamic pressure sensor comprises a sensor probe which is internally provided with a sensor chip, the sensor chip is fixed through a heat-resistant ceramic adhesive, the sensor probe is connected with a metal tungsten filament which passes through a seal plate, and the seal plate is connected with the sensor probe; the front end face of the sensor probe is provided with a pressure guidance hole which communicates with a pressure channel and a square sensor chip in the sensor probe, the rear end of the sensor chip installation groove is provided with a sensor vacuum chamber, and the side wall of the sensor probe is internally provided with a the metal tungsten filament taken as a lead terminal of the pressure sensor; the sensor chip is square-shaped, four sensitive resistors are arranged at the front surface of the sensor chip in the same direction, the back surface of the sensor chip is a square cavity corresponding to a square sensitive film, andthe pressure is applied to the square sensitive film through the pressure guidance hole. The miniaturized heat-resistant and high-dynamic pressure sensor is small in volume, resistant to heat and fast in response, and can be used for measurement of the total pressure and the static pressure.

The invention discloses a municipal road safety structure which comprises more than one square cavity arranged side by side on the road surface, the bottom surface of the rectangular cavity is mountedon a base, An elastic airbag cushion is embedded in the base, An elastic airbag cushion has an air storage chamber therein, At least one first outlet orifice is arranged on that lower end surface ofthe air storage chamber, An output end of the first outlet orifice communicates with an inlet cavity inside the base, the top of the elastic airbag cushion is movably arranged on a pedal plate, More than one pedal board is equally spaced and parallel to each other to form a pedestrian crosswalk line, and each pedal board is embedded with an alarm device on the side close to the vehicle advancing direction, and the alarm device rises after the pedal board is lowered, and a warning protective wall is formed in the vehicle advancing direction of the pedestrian crosswalk line. The invention adoptsthe pedal lifting structure, can raise a barrier on one side of the crosswalk, reminds the incoming vehicles to stop moving forward, better protects the pedestrians on the sidewalk, and does not affect the normal passage of the vehicles.

A thin film curtain wall structure comprises a thin film, a pull rope which is fixed around the thin film and a clip connecting piece which is fixed on a main body component of a building, the technical key points of the structure are that the clip connecting piece is composed of a metal section keel, a metal section gland which is assembled on the metal section keel and a metal section clamp of a clamping pull rope, wherein the metal section clamp is inserted in a square-cavity which is formed by the metal section gland and the metal section keel, a sponge rubber strip is arranged between the thin film and the metal section gland, a rubber strip is arranged between the thin film and the metal section keel, and a water-proofing membrane layer is arranged between the metal section gland and the metal section keel. The structure has rational structure design and can effectively solve the problems in an existing technique such as complex installing technique, material waste, bad external appearance effect, waterproof difficulty and the like and has the advantages of rapid installment, convenient regulation, safe and reliable use and good water proof function, the requirements of building functions are satisfied, simultaneously, the lighting effect of the building is prominently increased, and the material cost and the construction cost are lowered.

A three-degree-of-freedom integrated stick-slip linear positioning device relates to a positioning device and solves the problems that existing positioning devices are large in size, high in assembling error and low in positioning precision. The Three-degree-of-freedom integrated stick-slip linear positioning device comprises a bearing plate and a cap matched with a driving unit. The cap is fixedly connected to a surface of the bearing plate. The driving unit comprises a first press block, a second press block, an elastic driving base, a piezoelectric ceramic driver, a guide pillar, a contact, a shifting plate, a pretightened press plate and multiple balls, the upper end face of the piezoelectric ceramic driver is connected with the lower end face of the upper elastic plate of the elastic driving base, the lower end face of the piezoelectric ceramic driver is connected with the upper end face of the contact, the lower end face of the contact is connected with the upper end face of the shifting plate, the lower end face of the pretightened press plate is connected with the upper end face of a lower elastic plate of the elastic driving base, and two longitudinal ends of the shifting plate are disposed outside a square cavity of the elastic driving base and detachably connected with a base respectively. The three-degree-of-freedom integrated stick-slip linear positioning device is used for positioning articles.

The invention belongs to the technical field of filters, and discloses a dual-mode SIW filter capable of realizing frequency and bandwidth and zero-point adjustability. The dual-mode SIW filter is composed of an upper metal surface, an intermediate medium substrate and a lower metal bottom surface, and is composed of a square substrate integrated waveguide dual-mode resonant cavity; and frequencyadjustability, bandwidth reconfigurability and zero point controllability of the filter are realized by utilizing the simple-parallel mode of the square cavity; the overlarge size caused by direct coupling cascade connection of multiple cavities can be avoided; the problem that the insertion loss is relatively high is solved, and the size of the whole filter is relatively compacted; two transmission zero points are introduced to the two sides of the filter passband, so that the selectivity and out-of-band rejection of the filter are improved; the frequency adjustability is realized in a wide frequency band, and the bandwidth reconfigurability and zero point controllability are realized, so that the functions can be realized only in a single cavity by changing the different capacitance values of five variable capacitance diodes.

The invention relates to a substrate integrated multi-mode filter which is based on a square high-order mode cavity, the upper surface and the lower surface of a medium substrate (1) are respectively coated with an upper surface metal (7) and a lower surface metal (8), a metalizing through hole array (2) penetrates the medium substrate (1), the upper surface metal (7) and the lower surface metal (8); a first inductive column (3) and a second inductive column (4) which can play the roles of regulating the eigenfrequency of different modes and coupling between the modes are positioned in a square cavity which is surrounded by the metalizing through hole array (2); a first metal column inductive window (7) and a second metal column inductive window (8) are respectively arranged on the adjacent two sides of the square cavity, the cavity can realize the coupling of the input and the output of energy by metal column inductive windows; a first metalizing through hole array (5) and a second metalizing through hole array (6) are respectively positioned at the first metal column inductive window (7) and the second metal column inductive window (8) to be corresponding to the input and the output of the cavity of the filter, which are connected with an external circuit.

The invention relates to an improved optical fiber splice sealing box and a sealing method. The optical fiber splice sealing box is composed of an optical fiber fusion splice tray used for containing and fixing a main optical cable and a plurality of optical fibers, a sealing member used for matching the optical fiber fusion splice tray to fix the main optical cable and the optical fibers, a pressing plate used for fixing the sealing member on the optical fiber fusion splice tray, a square cavity box used for containing the optical fiber fusion splice tray and connected with the pressing plate and the sealing member to form a closed cavity. The optical fiber splice sealing method is as follows: the sealing member fixed with the main optical cable and the optical cables is arranged in a semi-closed cavity on one end of the optical fiber fusion splice tray and is fixedly connected with the optical fiber fusion splice tray through the pressing plate. The optical fiber splice sealing box uses an improved mechanical sealing form and has the advantages of reliable sealing method, simple and convenient operation, repeated use and convenient repair and market expansion.

The invention relates to a cross-shaped slot antenna, and belongs to the technical field of antennas. The antenna is composed of a dielectric radome, a radiating square cavity, cross-shaped slots, a multi-mode waveguide square cavity and a feed square waveguide. All the parts are arranged from top to bottom in sequence in a laminating mode. The topmost layer is a first layer which is a medium flat plate, namely, the medium dielectric radome; the second layer is formed by four metal square frames, namely, the radiating square cavity; the third layer is formed by four cross-shaped slot bodies, namely, the cross-shaped slots; the fourth layer is a metal square cavity, namely, the multi-mode waveguide square cavity; the fifth layer is a waveguide with the square cross section, namely, the feed square waveguide. The cross-shaped slot antenna is of a layered structure and can be machined in a layered mode, screws are used for connecting all the layers, and the welding technology of a traditional antenna is eliminated. The cross-shaped slot antenna is simple in structure and easier to machine.

The invention discloses a thermoelectricity cooling device of an ultrasonic motor. The thermoelectricity cooling device comprises the ultrasonic motor, a thermoelectric cooler, three cooling layers and an outside drive motor, wherein the thermoelectric cooler is in a square shape and is externally tangent to the circumference of a casing of the ultrasonic motor; a circular roller is arranged on the lower surface of the thermoelectric cooler; the three cooling layers are in the same structure and symmetrically connected through keyways at 120 degrees pairwise; the cooling layers are in a square cavity structure, and circular grooves are arranged on the upper surfaces of the cooling layers; the cavities are filled with inorganic salt phase change materials; and a spindle head of the outside drive motor is connected with the middle keyway of the three cooling layers. According to the thermoelectricity cooling device of the ultrasonic motor, the structure is compact, the size is small; the thermoelectric cooler is adopted to replace the existing motor metal bases, so that heat generated in a stator of the motor can be transferred quickly; and inorganic salt phase change is adopted for the cooling layers to absorb heat, a cooling circuit is not needed to be externally connected, and the thermoelectricity cooling device is suitable for situations with low mobility in sealed environments and can be recycled.