2373 results about "Isosceles trapezoid" patented technology

The invention relates to an ultrafine particle deduster used for treating industrial fumes. Specifically, an electro-bag compound deduster of the second-grade filtration mode is improved, an onflow vortex mechanism is arranged between the outlet of a filter bag dedusting mechanism and the inlet of an induced draft fan, and the onflow vortex mechanism comprises an onflow vortex chamber, a fume inlet tube and a fume outlet tube; the onflow vortex chamber is in bucket shape of which the cross section is an inversed isosceles trapezoid, and the bottom of the onflow vortex chamber is connected withan ash bucket chamber. Secondary treatment fume which contains finer particulate matters enters the fume inlet tube; airflow downwards deflects after passing through an air deflector and enters the onflow vortex chamber, and finer particulate matters and the inner wall of the onflow vortex chamber diffuse and collide to accelerate ultrafine particles to precipitate, thus separating ultrafine particulate matters from fume. The filter efficiency of the ultrafine particle of the invention can reach above 99.99%; under the condition that the resistance of the deduster body is smaller than 1000Pa(other conditions are same), an anode or cathode fiber filter bag of which the mesh aperture is 5 mu m is used, and the outlet concentration of the deduster is smaller than 15mg/Nm<3>.

This invention provides a golf club head including a plurality of score lines on the face. The golf club head includes a plurality of striations formed on the face and extending from a toe side to a heel side. A depth Dp of each striation satisfies 10 μm≦Dp≦40 μm. A cross-sectional shape of each striation is an isosceles trapezoid having an upper base at the face side and a lower base at the back side of the golf club head. The upper base and lower base satisfy the upper base>the lower base. A width Pb of the bottom portion of each protrusion formed between the striations and a width Wb of the lower base satisfy Pb<Wb.

The invention provides a tunable nanometer antenna and a preparation method thereof. The tunable nanometer antenna comprises three layers which comprise an upper layer metal structure, a middle layer single-layer grapheme and bottom substrate materials; the upper layer metal structure is a bowknot structure; the bowknot structure is formed by two isosceles trapezoids and a square. The preparation method of the tunable nanometer antenna comprises the following steps of covering the layer of single-layer grapheme on a silicon dioxide substrate through a chemical vapor deposition method; coating resist coating in a rotary mode on the single-layer grapheme; achieving structural corrosion and developing through the electron beam lithography technology; achieving evaporation of a golden layer through the vacuum electron beam evaporation technology; obtaining a final nanometer optical antenna through a lift-off process. The tunable nanometer antenna has the advantages of being small in size due to the fact that the thickness of a metamaterial structure is in the dozens of nanometer level and beneficial to application in integration optics; being high in signal intensity due to the fact that magnetic field enhance through the nanometer optical antenna can achieve more than 20000 times under illumination of incident light under specific frequency; being obvious in modulation effect.

The invention discloses a skin for morphing wings, belonging to the technical field of design of morphing aircrafts. The skin for the morphing wings is made from fibre reinforced composites, and the cross section of the skin is in an isosceles trapezoid ripple structure. The invention also carries out analysis aiming at the chordwise and spanwise equivalent elastic modulus and flexural modulus ofthe skin structure with isosceles trapezoid ripples, provides a corresponding mathematical model and can further optimize the skin structure according to the mathematical model. The invention meets the requirements of the skin of the morphing wings of the morphing aircrafts for large deformation aerodynamic load bearing, can realize the design optimization of the skin structure under different load operating conditions according to the mathematical analysis model of the equivalent elastic modulus and the flexural modulus in two different directions of the skin structure, also has structure health monitoring and self-adapting deformation capability and can realize optimal aerodynamic characteristics by controlling the shape and the vibration of the skin.

The present invention discloses a color filter structure which is provided with a transparent baseplate; a plurality of pixels are formed on the baseplate, wherein, each pixel is provided with a first color zone, a second color zone and a third color zone, in particular each pixel is an isosceles trapezoid; each two pixels are spliced to a regular hexagon; three identical regular triangles are in rabbet joint inside each isosceles trapezoid; three regular triangles respectively correspond to the first color zone, the second color zone and the third color zone, and after each two pixels are spliced to the regular hexagon on the transparent baseplate, with an arbitrary regular hexagon as the center, six regular hexagons spliced by other pixels in two are faveolately in scarf joint around. The color filter with the structure has good color display effect and can weaken sawtooth in the margin of image when the image is displayed obliquely.

A pixel array and a manufacturing method thereof, and an organic light emitting diode array substrate are disclosed. The pixel array comprises a plurality of pixels. Each pixel comprises four sub-pixels. Sizes of the four sub-pixels are the same and shapes of the four sub-pixels are an isosceles trapezoid. The four sub-pixels are arranged in a shape of a half of a regular hexagon. A display screen possessing the above structure has high rotation symmetry. A high resolution ratio and a high homogeneous degree can be acquired from each direction of the display screen.

The invention discloses a panoramic picture method based on a hemisphere annular panoramic camera which includes the following steps: firstly, dividing an original image into four small areas, transforming coordinates and forming an isosceles trapezoid image; secondly, stretching the isosceles trapezoid image into a rectangular image through a bilinear transformation method. When one area is processed, corresponding relationship of coordinates can be directly applied to the rest three areas. Finally the four areas are connected from head to tail in sequence. A strip-shaped 360 DEG panoramic picture is obtained and regarded as a rectangular image capable of being accepted by human being and processed by a computer. A certain breakthrough on rapidity of algorithm is achieved. The aim is to achieve effect of real-time monitoring. Image quality is good enough to satisfy general video monitoring requirement.

The invention discloses a folding type four-degree-of-freedom parallel connected stable platform. The folding type four-degree-of-freedom parallel connected stable platform comprises a flexible platform, a fixed platform and four branches; the four branches are used for connecting the flexible platform and the fixed platform; structures of the first branch and the third branch are identical, symmetrically arranged and are formed by spherical hinges, RRS upper connecting rods, first revolute pairs, lower connecting rods and second revolute pairs; structures of the second branch and the fourth branch are identical, symmetrically arranged and are formed by spherical hinges, RUS upper connecting rods, universal hinges, lower connecting rods and second revolute pairs; the four spherical hinges which are respectively connected with the flexible platform are arranged in a isosceles trapezoid shape; the four second revolute pairs which are respectively connected with the fixed platform are arranged in a square shape. The folding type four-degree-of-freedom parallel connected stable platform has the advantages of being simple in structure, small in occupying area, large in working space, rapid in dynamic response and easy to control.

The invention discloses a high-efficiency connection locking device of a building mechanical power line. The connection locking device comprises a device shell, wherein a cable insertion channel is arranged in the device shell, a socket is arranged on the bottom wall of the device shell and is arranged at the bottom of the cable insertion channel, a concave cavity and a prop-against cavity are arranged in the side wall of the device shell, a control press hole is formed in the bottom wall of the device shell, a driving channel is arranged between the concave cavity and the control press hole, a through groove is formed between the concave cavity and the cable insertion channel, a prop-against plate is arranged in the through hole, a V-shaped control sheet is arranged in the concave cavity, a press post is arranged in the press hole, a raising rod is arranged in the driving channel, an isosceles trapezoid press block is arranged in a buffer cavity, a reset pull hole is further formed, a rest pull rod is arranged in the reset pull hole, and a sliding prevention press block is arranged in the prop-against cavity. The connection locking device is simple in structure and is convenient to operate, cable connection locking can be effectively and rapidly achieved, a cable plug can be effectively from being loosening with the socket, and the application stability and the application reliability are greatly improved.

The invention discloses a tetragonal prismatic light wave band hidden device constructed by utilizing an anisotropic medium. The tetragonal prismatic light wave band hidden device is a housing with a cavity, which is surrounded by four transparent anisotropic medium units, the transparent anisotropic medium units are prism bodies with isosceles trapezoid-shaped cross sections, and the side surface in which each waist of the cross section of each anisotropic medium unit is located and the side surface in which the corresponding waist of the cross section of the adjacent anisotropic medium unitis located are jointed together; and the side surfaces in which the lower bottom edges of the cross sections of all the anisotropic medium units are located form an outer wall of the housing by surrounding, the side surfaces in which the upper bottom edges of the cross sections of all the anisotropic medium units are located form an inner wall of the housing by surrounding, and the cavity of the housing is used for placing an object to be hidden. When light passes through the device disclosed by the invention, the anisotropic medium is used for controlling the propagation direction of the light and enabling the light to bypass the middle cavity, and the emergent direction of the light is the same with the original incident direction of the light, so that the device has a hidden effect in four directions and is suitable for a whole visible light wave band.

The invention relates to a twisting box-shaped member and a manufacture process thereof and belongs to the technical field of steel structures. The twisting box-shaped member comprises a top plate, a base plate and a rectangular box, wherein the rectangular box is enclosed by webs, and the cross section of the rectangular box is an isosceles trapezoid. More than one cross partition plate is arranged on the rectangular box. The twisting box-shaped member is large in twisting range, reasonable in design and firm in structure.

The invention discloses a column-shaped electromagnetic wave stealth device with four-direction stealth effects. The column-shaped electromagnetic wave stealth device with the four-direction stealth effects comprises four first medium units and four second medium units, wherein the first medium units and the second medium units are isotropic and are transparent relative to incident electromagnetic waves, the refractive index of each first medium unit is larger than the refractive index of each second medium unit, the first medium units are column bodies, the cross sections of the column bodies are of isosceles triangle shapes, the second medium units are column bodies, and the cross sections of the column bodies are of isosceles triangle shapes or isosceles trapezoid shapes. Each second medium unit is arranged between every two adjacent first medium unit, adjacent second side walls are opposite to first side walls, and all third side walls face a stealth area. When the cross sections of the second medium units are of the isosceles triangle shapes, all fourth side walls face background media. When the cross sections of the second medium units are of the isosceles trapezoid shapes, all sixth side walls face the ground media and all seventh side walls face the stealth area. The column-shaped electromagnetic wave stealth device has the stealth effects of four directions, is insensitive to the polarization direction of the electromagnetic waves, and is suitable for a whole electromagnetic wave section.

The invention discloses a device for generating vector light beam through an annular combination half wave plate. According to the invention, a plurality of half wave plates with different fast axis directions and in isosceles trapezoid form an annular combination half wave plate in an approximate circular ring shape in a seamless splicing way, so as to avoid the problem of sharply increased diffraction loss of a central zone due to a great amount of adopted fanshaped half wave plates and then generate the vector light beam with high purity; and when high-order vector light beam needs to be generated, the quantity of the half wave plates can be increased to ensure high purity of the light beam. Compared with the prior art, the device provided by the invention adopts the annular combination half wave plate formed by a plurality of trapezoidal half wave plates, so that the problem of sharply increased diffraction loss of the central zone due to increased plate does does not exist, and accordingly the high-order vector light beam can be ensured to be generated; an annular light beam converter formed by a first axial cone mirror and a second axial cone mirror which are plated with high-reflection gold films is adopted, so as to improve the reflectivity and damage threshold of laser; therefore, the device provided by the invention can be applicable to production of high-power vector light beam.

The invention relates to an anti-slide pile of a jointed arch structure. The anti-slide pile of the jointed arch structure is formed by jointing a plurality of reinforced concrete single pile bodies and arch structures. The cross sections of the reinforced concrete single pile bodies are all isosceles trapezoids, and anti-slide teeth are arranged on the two side faces of each single pile body to form friction sections; one side of the longitudinal section of the short bottom side of the isosceles trapezoid serves as a pile rear end of the corresponding single pile body for bearing landslide thrust, one side of each pile rear end is a pressure bearing region, the longitudinal section of the long bottom side of each isosceles trapezoid serves as a pile front end, and one side of each pile front end is a tensile region; the arch structures are also reinforced concrete structures and are connected between every two single pile bodies, and the arch structures evenly transmit the landslide thrust among the single pile bodies to the two sides of the corresponding isosceles trapezoids. The friction sections of the anti-slide pile enhance the anti-slide effects of the side of the pile, and the anti-slide capacity of the anti-slide pile is improved. When the anti-slide pile of the jointed arch structure is used, an unequal distance distributing method is adopted, and jointed arch pile distance layout dense in the middle and thin on the two sides is formed. The anti-slide pile is large in overall rigidity, pile tip displacement is small, and pile distances can be enlarged properly to reduce the number of anti-slide piles and lower project construction cost.

The invention discloses a construction method of a deformable template of a variable cross-section high pier, which comprises the step of installation of each pouring section external mould assembly, wherein each pouring section external mould comprises a plurality of layers of templates which are fixedly superposed together in sequence from bottom to up; each layer of template is formed by the encircling of two transverse templates and two longitudinal templates; the transverse templates are rectangular and have the width equal to that of a pier; the longitudinal templates are isosceles trapezoid and have the altitude equal to that of the transverse templates; and the next step of operation can be conducted according to the existing method after the installation of each pouring section external mould assembly is completed. With the method, a tower crane and a large template are omitted, the cost is saved, the defect that a large device is difficult to transport in an access road in mountain area is overcome, the construction is convenient, the period is shortened, and the construction quality is improved.

The invention discloses an electrochemical machining method of a horn-shaped micro hole array. The electrochemical machining method comprises the following steps of: manufacturing an upper electric insulation template, an auxiliary anode and a lower electric insulation template, wherein the upper electric insulation template, the auxiliary anode and the lower electric insulation template have thesame number of holes, the same arrangement way and the structural characteristic of the through hole cluster, and the axial section of each hole of the through hole cluster of the upper electric insulation template and the through hole cluster of the lower electric insulation template is an isosceles trapezoid having a shorter upper bottom edge, a longer lower bottom edge and bottom angles of 30-70 degrees; laminating and stacking up the upper electric insulation template, a workpiece, the auxiliary anode and the lower electric insulation template closely in order; aligning the axes of all the corresponding through holes; connecting an upper tool cathode and a lower tool cathode with the negative pole of a power supply, and connecting the workpiece with the positive pole of the power supply; and introducing passive electrolyte into an electrolyte channel, and switching on the power supply to perform electrochemical machining. According to the invention, complex and multifarious processes of coating photoresist, exposing, removing the photoresist and the like in an electroforming process are got rid of, the processing efficiency is enhanced, the production cost is reduced, and the electrochemical machining method is more helpful for realizing one-step forming and batch production of the hole cluster with the horn-shaped hole sections.

There is a chassis with retractable wheels, wherein the chassis includes a housing. The chassis may also include a chassis sled slidably disposed within the housing. In addition, the chassis may include a pair of lever arms, each said lever arm being disposed in the lower portion of the housing. Furthermore, the chassis includes a pair of mounting wheels, a fender configured to cover the wheels openings in a retracted position, and a web joining the fender to the wheel lever, and having a second end. The chassis with retractable wheels includes a chassis sled, wherein the chassis sled includes an isosceles trapezoid configuration. The chassis sled also includes a pair of receiving members pivotly attached to the first end of the pair of lever arms. The chassis further includes a separation panel attached to the housing configured to conceal the mechanical components of the chassis with retractable wheels.

The invention relates to a thread implant which is characterized in that the thread implant comprises a cylindrical implant; the edge of the top of the implant is provided with smooth chamfers; the upper part of the implant is provided with a fine external thread with the thread tooth profile of isosceles trapezoid; the lower part of the implant is provided with an external thread with the thread tooth profile of trapezoid; the thread depth of the trapezoid external thread is gradually shoaled from bottom to top; the bottom of the implant is a spherical surface; the lower part of the trapezoid external thread of the implant is uniformly provided with three vertical cutting trough; the center of the top of the implant is provided with a truncated cone hole below which a regular octagonal hole is arranged; an internal thread blind hole is arranged below the regular octagonal hole. The thread implant is provided with excellent initial stability effect, is beneficial for the long-term stability of the implant, has high implant structure safety coefficient, is beneficial for the combination of gum and implant, can effectively restrict the adsorption of bacilli, and can be widely applied to various restoration process of denture implant due to tooth loss.

The invention relates to a cylindrical permanent magnet linear motor with high thrust density, belonging to the technical field of motors and solving the problems of low thrust density and poor overload capability of traditional cylindrical motors. The primary of the cylindrical permanent magnet linear motor with high thrust density comprises an armature iron core and an armature winding, wherein the armature iron core is radially provided with a first channel, the central line of the first channel is parallel to the axial direction of the motor, the armature winding is assembled on the inner wall of the armature iron core and comprises a plurality of cake-shaped windings which are arranged in a cylinder shape according to a phase sequence, the wiring terminals of the cake-shaped windings respectively penetrate through the first channel and are connected, and an air gap is formed between the inner circumferential surface and the secondary outer surface of the armature winding. A plurality of secondary iron cores and a plurality of permanent magnets are mutually separated and sleeved in match on the outer circumferential surface of a non-magnetic beam barrel, two secondary iron cores are respectively sleeved at two end parts on the outer circumferential surface of the non-magnetic beam barrel, the axial cross section of each permanent magnet is an isosceles trapezoid, each permanent magnet is in an axial magnetism-charging structure, and the adjacent permanent magnets have opposite magnetism-charging directions. The invention is used as a linear motor.

The invention discloses a tool capable of quickly measuring circular arc radius, in particular a diameter gauge, which is characterized by comprising a gauge body and two gauge feet, wherein the outlines of the gauge body and the gauge feet are of straight line segments, and the two gauge feet are symmetrical relative to a gauge body axis so as to form three edges of an isosceles trapezoid which takes the gauge body as an upper bottom and the two gauge feet as waists; and the inclined angle of the extended lines of the two gauge feet is 60 degrees, and the middle section of the gauge body is provided with a telescopic sliding scale the central line of which is coincided with the perpendicular bisector of the gauge body. Any rounded object, the angle of circumstance of which is not less than 120 degrees, can use the tool with the structure to solve the problem in practical work that the radius is difficult to measure, and the tool has the advantages of simple structure, low cost and convenient use.

The invention relates to a pixel structure which is suitably applied for electrical connection with a scan line and a data line. The pixel structure comprises an active component and a pixel electrode. The active component is electrically connected with the scan line and the data line. The pixel electrode is electrically connected with the active component. The pixel electrode comprises a plurality of strip-shaped slit groups. Each strip-shaped slit group comprises a plurality of strip-shaped slits the extending directions of which are parallel to one another. At least parts of the strip-shaped slits are of a non-isosceles trapezoid shape. A display panel using the pixel structure in the invention is not prone to dark line defects. Therefore, the display characteristic of the display panel is optimized.