32results about How to "High lightweight" patented technology

A wafer holder is provided having high rigidity and an enhanced heat-insulating effect that allow positional accuracy and heating uniformity to be improved, a chip to be rapidly heated and cooled, and the manufacturing cost to be reduced, and a wafer prober apparatus on which the wafer holder is mounted. The wafer holder of the present invention includes a chuck top for mounting a wafer, a support member for supporting the chuck top, and a stand for supporting the support member. The chuck top has a thermal conductivity K1 and a Young's modulus Y1; the support member has a thermal conductivity K2 and a Young's modulus Y2; and the stand has a thermal conductivity K3 and a Young's modulus Y3. K1>K2 and K1>K3; and Y3>Y1 and Y3>Y2.

The invention relates to an active thermal control focusing device for a space camera. The device comprises a secondary mirror component and a focusing component, wherein the secondary mirror component comprises a secondary mirror chamber (1), a secondary mirror pressure ring (2) and a secondary lens (3); the focusing component comprises a heatproof mat (4), an invar steel column (5), an aluminum ring (6), a heating piece (7), a radiator (8) and a thermistor (9); the secondary lens (3) is tightly pressed in the secondary mirror chamber (1) through the secondary mirror pressure ring (2). The device has the advantages of consistency with a space using condition, stable performance, high accuracy and reliable structure.

A reversible camouflage material including a textile layer having a woodland camouflage print thereon, an infrared suppressing layer, and a textile layer having a desert camouflage print thereon is provided. The infrared suppressing layer may include a polyurethane layer sandwiched between a carbon-containing ePTFE layer and an ePTFE layer. The carbon may be provided in an oleophobic layer on the ePTFE or within the ePTFE film. In one embodiment, the desert camouflage textile is absent and a coating composition that includes a colorant and infrared suppressive additives is applied to the outer surface of the ePTFE layer. The inventive camouflage material demonstrates camouflage concealment in the near IR (nIR) and short wave infrared (SWIR) wavelengths of the electromagnetic spectrum. In addition, the camouflage material is highly breathable and lightweight. The material is particularly suitable for making reversible camouflage garments such as jackets and pants.

The invention provides a detachable flexible support device comprising a reflector the body of which is provided with a circumferential flange surface; and at least three flexible support members connected with the reflector and uniformly distributed on the circumferential flange surface. Each flexible support member is provided with a countersunk hole, a pin hole, a threaded hole and at least onepair of staggered orthogonal flexible slots. The detachable flexible support device can reduce flexible machining difficulty and can increase the lightening rate of the reflector.

A hydropnuematic riveter system is described, having features that allow for a reduction in size and weight over traditional rivet squeezers and rivet pullers. The riveter system also provides for greater versatility by permitting the operator to connect different rivet forming heads to the pressure intensifier portion, via a single flexible conduit with fluid-tight quick disconnect fittings.

The invention relates to a space remote sensor support frame made of carbon fiber composite, comprising a horizontal lifting ring, a remote sensor support frame body and a vertical lifting ring. The remote sensor support frame body is formed into a three-dimensional grid-like structure by a closed shell, internally peripherally radiating reinforcing ribs and axially parallel reinforcing ribs. Theshape of the inner side wall of the shell corresponds to the shape of a space remote sensor; the outer side wall of the shell comprises an circular-arc shaped plate, a left vertical plate, a right vertical plate, a front plate, a rear plate and a bottom plate; the left vertical plate is connected with the bottom plate through a left horizontal plate and a left inclined plate; the right vertical plate is connected with the bottom plate through a right horizontal plate and a right inclined plate; the space remote sensor is fixedly connected with a round flange of the remote sensor support framebody; and the horizontal lifting ring and the vertical lifting ring are connected with the remote sensor support frame body through pre-buried components. The space remote sensor support frame made of carbon fiber composite has a light weight, high structural strength and high lightweight rate and can be applied to the space remote sensing field and the rocket, aviation and machinery industries.

A structural member includes: a compression-side wall part disposed in a compressive stress field of a bend; a tension-side wall part disposed in a tensile stress field of the bend; and a coupling wall part that couples the compression-side wall part and the tension-side wall part. The neutral axis of the bend is disposed in the vicinity of the compression-side wall part. For example, the compression-side wall part is higher in material strength, and / or larger in sheet thickness, than the tension-side wall part.

The invention discloses a design method of a large caliber optics telescope four way structure and the obtained four way structure, relates to the machinery industry photoelectric instrument field, and solves the problems that an existing design method of an existing four way structure is long in product design period and the existing four way structure is low in structure lightweight rate. The design method of the large caliber optics telescope four way structure includes steps: building a four way structure initialization geometric model of the large caliber optics telescope four way structure, using a finite element method to build a finite element simulation model of the large caliber optics telescope four way structure in dispersion mode, using four way material distribution as an optimization design variable and setting reduction of the weight of the existing four way structure as an optimization objective under an optimization constraint condition which meets displacement deformation, using a topological optimization method to perform weight reduction optimization on the finite element simulation model, performing distribution design on a shell plate, an inner rib plate and an inner circle plate and confirming the initial thicknesses of the shell plate, the inner rib plate and the inner circle plate, using the initial thicknesses of the shell plate, the inner rib plate and the inner circle plate as another optimization design variable to perform the weight reduction optimization twice, and performing rigidity performance analysis verification to obtain the lightweight four way structure which meets performance constraint. The maximum deformation value of the obtained four way structure is 0.0698mm, and less than the maximum design deformation value 0.08mm, and the weight of the obtained four way structure is reduced from 122.217t to 13.776t, and furthermore the lightweight rate of the obtained four way structure reaches 89%.

A light space camera main force-bearing device with a focusing function belongs to the technical field of space optical remote sensing. The problem that the requirements for the quality and assembly of parts are high and the envelope size and quality of effective loads are increased due to the fact that a focusing mechanism needs to be independently designed to achieve camera focusing in the priorart is solved. A main force-bearing back plate is coaxially and fixedly connected to the bottom end of a lower circular ring structure. A primary mirror of a camera is arranged on the main force-bearing back plate, and a secondary mirror of the camera is arranged on an upper circular ring structure. The linear expansion coefficient characteristic of the material of a main force-bearing truss andthe linear expansion coefficient characteristic of the material of the main force-bearing back plate are matched. Heat conducting films are respectively adhered to the outer wall of the lower circularring structure and each truss rod, and a thermistor and a plurality of heating sheets are adhered to each heat conducting film. Through cooperative use of the heating sheets, the thermistors and theheat conducting films and through the main force-bearing truss and the main force-bearing back plate with matched material linear expansion coefficients, camera focusing is realized.

The invention discloses a processing method of a 3D printing silicon carbide reflector. The processing method comprises the steps of grinding a 3D printing silicon carbide workpiece to obtain a flat workpiece surface, then carrying out grinding and rough polishing to obtain a reflector surface meeting the initial surface shape and surface quality requirements, and then carrying out magnetorheological modification and conformal smoothing on the reflector surface in an iteration mode until the index requirements are met. According to the method, the problem that multi-phase structures are not uniformly removed in the processing course of the 3D printing silicon carbide reflector can be solved, the defects of the surface shape and the surface quality of an existing silicon carbide reflector polishing technology are overcome, ultra-precision processing of the 3D printing silicon carbide reflector is realized, the processing surface shape precision is high, and the surface quality is good.

The invention provides a large-visual-field off-axis four-mirror lens device which comprises an integrated lens frame and also comprises a first mirror, a second mirror, a third mirror, a fourth mirror and a detector orderly installed on the lens frame along a light transmission direction. The first mirror is fixed to a first lens seat which is installed on the lens frame. The second mirror is fixed to a second lens seat which is installed on the lens frame. The third mirror is fixed to a third lens seat which is installed on the lens frame. The fourth mirror is fixed to a fourth lens seat which is installed on the lens frame. The large-visual-field off-axis four-mirror lens device provided by the invention has the advantages of good mechanical performance, a high lightweight ratio, small thermal deformation and good comprehensive space environment adaptability.

A Hedge Trimmer Extension Adaptor is disclosed. A device for adapting a standard hedge trimmer (electric, battery or gas powered) so that the operator can reach and trim hedges that are normally beyond the operator's reach either vertically, horizontally or both, without resorting to ascending a ladder or other unsafe efforts.The tool consists of four parts. The hedge trimmer is a commercially available electric hedge trimmer. The switch assembly, the support pole assembly, and the upper tray adaptor are the other three parts. The support pole assembly is screwed into the “Hedge Trimmer Extension Adaptor” system and is the handle the operator holds onto. The switch assembly snaps onto the support pole assembly and is used to control the hedge trimmer. This product is very novel because of the simplicity of the design and the snap together construction. The design incorporates a significant amount of adjustability and features and it is only composed of two major parts.

The embodiment of the invention discloses a vehicle parking path planning method and device. The method comprises steps of determining the information of a road where a current vehicle is located andthe current movement information of other vehicles except the current vehicle when roadside parking needs to be carried out; if the road information meets the parking condition, extracting a road edgein the road information, and determining a parking position according to the road edge; according to the parking position, the current motion information of the current vehicle and the current motioninformation of other vehicles, if a target parking path which is generated based on a path transformation model, meets vehicle position constraints and enables a target function to reach a preset convergence condition is obtained, the current vehicle is controlled to drive into the parking position according to the target parking path; wherein the path transformation model enables the parking position and the current motion information of the current vehicle and other vehicles to be associated with the target parking path when the current vehicle changes the path. By adopting the method, accuracy and efficiency of parking path planning are improved.

The invention discloses a rotating device for a remote sensing scanning mirror. In each scanning cycle of the scanning mirror, a rotating disk rotates an intermittent angle first, controls the main body of the rotating device to swing back and forth and rotates the rotating disk by an intermittent angle again, and such sequential cycle makes the rotating disk rotate 360 degrees to complete a scanning cycle, thereby ensuring the comprehensiveness, stability and order of the remote sensing scanning while ensuring the scanning range, and improving the remote sensing scanning performance. The rotating device provided by the invention can adjust the deflection of the adjusting block through a universal shaft and a universal joint, thereby adjusting the angle of the scanning mirror and wideningthe scanning range. By forming a lightweight metal surface glass in the invention, the lightweight metal surface vitrified mirror effectively laminates the lightweight metal with the large-area glassfor precision optical processing of the large-area glass and then plating of an infrared reflective film. Such mirror has high lightweight rate, and the high rigidity, high thermal conductivity and large-area glass has the excellent characteristic of being easy to precision optical processing.

The embodiment of the invention discloses a method and device for extracting road edges. The method comprises steps of original point cloud data, a first course angle of a target vehicle at the current moment and a second course angle of the target vehicle at the last moment being acquired; judging whether the difference between the first course angle and the second course angle is greater than apreset threshold value or not; if yes, the current turning angle theta of the target vehicle being calculated, the original point cloud data being converted twice based on theta, two sets of point cloud data meeting preset conditions being obtained, and the two sets of point cloud data serving as point cloud data to be processed; if not, converting the original point cloud data based on a preset angle to obtain target point cloud data meeting a preset condition, and taking the original point cloud data and the target point cloud data as to-be-processed point cloud data; and determining road edge points according to the to-be-processed point cloud data. The method is advantaged in that a road edge of the environment where the vehicle is located can be extracted when the vehicle passes through the crossed road section, and safety of the vehicle driving process is improved.

The invention provides a lightweight reflecting mirror structure based on an additive manufacturing technology, which belongs to the technical field of optical manufacturing and comprises a mirror surface, a lightweight supporting structure for supporting the mirror surface, an outer frame for mounting and fixing the mirror surface and a back plate, the lightweight supporting structure is positioned in a space surrounded by the mirror surface, the outer frame and the back plate, and consists of a plurality of truss groups which are uniformly arranged on the back plate; the lightweight supporting structure is prepared by adopting an additive manufacturing technology. According to the light-weight reflecting mirror structure based on the additive manufacturing technology, the mirror body is designed in a back plate closed mode, internal truss design is adopted for light weight, the machining means is additive manufacturing, and truss structures commonly used in additive manufacturing and constructional engineering are introduced into the light-weight reflecting mirror, so that the strength requirement of the mirror body is met, and the service life of the light-weight reflecting mirror structure is prolonged. And the lightweight rate is further improved, and the problem that machining cannot be conducted through a traditional material reduction machining means is solved.

The invention relates to a high-strength lightweight stab-resistant material and a preparation method thereof. The stab-resistant material is prepared by compounding a mixed solution composed of epoxy resin, an epoxy flexibilizer, an epoxy curing agent, a silane coupling agent and the like with aramid fibers through a prepreg hot-pressing process. The mixed solution comprises 30-50 parts of epoxy resin, 1-10 parts of an epoxy toughening agent, 1-10 parts of an epoxy curing agent and 0-5 parts of a silane coupling agent; the epoxy toughening agent is a self-made toughening agent and is obtained by grafting and modifying epoxy resin by adopting an acrylate monomer, so that the effect of toughening the epoxy resin can be achieved, and the compatibility between the toughening agent and the epoxy resin can also be improved. Uniformly mixing the mixed solution, adjusting the mixed solution to proper viscosity by using a solvent, carrying out dipping treatment on the mixed solution and aramid fiber woven fabric to obtain prepreg, and pressing the prepreg by using a hot press. The stab-resistant fiber material obtained by the material and the method has the characteristics of high strength, light weight and good softness.

The invention discloses a reflector and a preparation method thereof, and belongs to the optical field. The preparation method comprises the following steps: material preparation: selecting quartz glass, of which the expansion coefficient is 5*10<-7> / DEG C or the expansion coefficient is equal to or smaller than 1*10<-7> / DEG C, as a blank material; preparation of a first glass plate, a second glass plate and a lightweight interlayer: carrying out cold processing on the blank material to obtain the first glass plate and the second glass plate in preset shapes; preparation of the lightweight interlayer: carrying out cold processing on the blank material to obtain a glass plate having lightening holes in preset shape; preparation of a reflector blank: stacking up the first glass plate, the lightweight interlayer and the second glass plate in sequence and carrying out sintering, then, carrying out heat preservation annealing treatment, and finally, reducing the temperature to the room temperature and obtaining the reflector blank; and carrying out shaping, frosting and polishing processing on the reflector blank to obtain a reflector. The reflector prepared by the preparation method above is high in lightweight rate and long in service life.

A comprehensive main support backplane for a light-weight space camera relates to the field of space optical remote sensing technology, and solves the problem that a light-weight space camera cannot meet the strict quality requirements, thermal stability requirements and mechanical performance requirements of the whole machine. The comprehensive main support backboard of the present invention mainly includes panels, reinforcing ribs, embedded parts and various installation interfaces. The panel is a circular rotationally symmetrical structure, which reduces the local deformation of the structure under the action of gravity and temperature; the reinforcement ribs are evenly distributed on the inner and outer ring circumferences; the distribution of the reinforcement ribs forms a triangular reinforcement hole, which improves the stability of the structure The embedded parts are distributed in the installation interface to improve the stability of the threaded connection; the present invention combines the functions of the main bearing plate of the camera and the supporting back plate of the main mirror, and greatly improves the mechanical and thermal performance of the camera. Improve the utilization rate and light weight of camera components.

The invention discloses a reflecting mirror and a preparation method thereof. The reflecting mirror comprises the following steps: preparing a light-weight structural layer: carrying out cold machining on a blank so as to obtain a first glass plate with a support frame, wherein a groove with a preset shape is formed by the surrounding of the support frame and the first glass plate, and the preset shape is triangle, quadrangle, pentagon, hexagon, sector or round; preparing a second glass plate; preparing a reflection mirror blank: coating a weld surface of the second glass plate with a welding object, wherein the welding object is an aluminum-containing silicon type sheet-shaped or powdery material, and the expansion coefficient is less than or equal to 5*10<7> / DEG C; welding a welding surface of the second glass plate with a welding surface of the support frame, so as to obtain the reflection mirror blank; and carrying out shaping, frosting and polishing on the reflection mirror blank, so as to obtain the reflecting mirror. The reflecting mirror prepared by virtue of the preparation method has the advantages of high light-weight rate and firm structure.

Disclosed is a thermoelectric device, including a flexible substrate having a zigzag configuration in which a vertical cross-section in a longitudinal direction of one surface thereof includes peaks and valleys and a thermoelectric material line positioned on the flexible substrate and configured to include a p-type thermoelectric material and any one of an n-type thermoelectric material and an electrode material, which are alternately continuously disposed, wherein any one of the n-type thermoelectric material and the electrode material is in contact with the p-type thermoelectric material at the peaks and the valleys. The thermoelectric device, having a zigzag configuration, is highly flexible and lightweight, and a thermoelectric material in film form can be utilized to realize a vertical temperature difference, and thus the thickness of the device can be freely adjusted regardless of the film thickness, thereby easily maintaining a large temperature difference even without a heat sink.