216 results about "Concentric ring" patented technology

The invention provides a metasurface structure and method for realizing transverse polarization focusing light splitting, and the metasurface structure comprises a substrate and a surface structure which is disposed on the substrate. The surface structure is composed of a plurality of sub-wavelength structure units which are arranged in a concentric circular ring mode. The sub-wavelength structure unit performs polarization-independent focusing of an incident beam through transmission phase regulation and control, and performs polarization-dependent light splitting of the incident beam through geometric phase regulation and control. The point diffraction plate can realize light beam splitting and focusing functions related to polarization, has the advantages of being simple in structure and high in integration level, solves the technical problems that an existing point diffraction plate does not support synchronous phase-shifting interference measurement and the contrast ratio of interference fringes is low, and enables the contrast ratio of the interference fringes of point diffraction interference measurement to be higher, the resolving precision to be higher and the resolving speed to be higher.

The invention discloses a structure three-dimensional displacement monitoring method and device based on a monocular camera and a concentric annulus, and relates to the field of computer vision and structure health monitoring, a concentric annulus target is fixed at a to-be-monitored structure monitoring point, and the monocular camera carries out positioning and lens parameter adjustment; shooting a checkerboard image and calibrating the checkerboard image by adopting a camera calibration algorithm to obtain a distortion parameter and an internal reference matrix; collecting a video sequence containing a structure displacement process of the target; image distortion correction is carried out based on the distortion parameters and the internal reference matrix, a target is identified through a target detection algorithm, and target parameters are calculated through least square circle fitting; realizing multi-target tracking by a target point topology identification algorithm based on Y-X threshold sorting; calculating scale factors according to target parameters and actual physical sizes, and calculating in-plane orthogonal direction displacement and out-of-plane displacement to form three-dimensional displacement information of the structure; according to the invention, the monocular camera is adopted to realize the accurate measurement of the three-dimensional displacement of the structure and reduce the complexity and calibration difficulty of the system.

A portable centrifuge comprising a base, which includes a rotational mechanism contained within. A sequester wheel having a plurality of concentric rings, forming at least one channel and a central container. The at least one channel comprising a second volume and the central container comprising a first volume. A first cover is disposed over the sequester wheel to create a seal. A second cover is disposed over the first cover and is rotatable to engage with the rotational mechanism to initiate rotation at a predetermined RPM. The whole blood and / or other tissue is separated into its constituent components and deposited into the at least one channel and the central container. Specific volumes of the constituent components may be calculated to match or substantially match the first and second volumes for predetermined volume control and ease of access.

A rolling-element bearing includes first and second concentric ring assemblies and rolling elements supporting the ring assemblies for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring mounted axially to the first rolling ring and supporting a first seal element and a second seal element, and the second ring assembly includes a second rolling ring and a second sealing ring mounted axially to the second rolling ring. The first seal element includes a first lip in contact with the second sealing ring and the second seal element includes a second lip in contact with the second sealing ring, the first and second lips delimiting a first chamber between the first and second sealing rings, A first purging channel extends from an inlet at the first chamber to at least one outlet in at least one external surface of the second rolling ring.

A rolling-element bearing includes first and second concentric ring assemblies mounted for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring supporting first and second seal elements each having a lip. The second ring assembly includes a second rolling ring and a second sealing ring contacted by the lips of the first and second seal elements. The first sealing ring includes a first sealing member radially spaced from the first seal element and a first leakage test channel having an inlet between the first sealing member and the first seal element and an outlet at an external surface of the first sealing ring, and / or the second sealing ring includes second and third sealing members and a second leakage test channel having an inlet between the second and third sealing members and an outlet at an external surface of the second sealing ring.

An aerial vehicle configured for operation within indoor spaces has a meshed construction with a housing defined by upper and lower sections having meshes provided above and below propellers and motors of the aerial vehicle. The aerial vehicle also includes a suite of sensors such as LIDAR sensors, time-of-flight sensors, cameras, ultrasonic sensors, or others. Meshes of the upper and lower sections include central openings along with spokes and concentric rings provided about the central openings. Meshes of the lower section have substantially larger central openings than meshes of the upper section, but feature more dense spokes or concentric rings beneath tips of the rotating propellers, which may be hinged or foldable in nature. Data captured by sensors of the aerial vehicle may be utilized for any purpose, such as to generate environment maps of an indoor space, or to monitor the indoor space for adverse conditions or events.

This invention relates to the field of semiconductor lasers, and more particularly to a multi-chip ring array vertical cavity surface-emitting laser (VCSEL), comprising: a gain chip array, a beam-splitting axial conical lens group, a beam-combining axial conical lens group, and an output coupling mirror arranged coaxially. The gain chip array includes N (N>1) VECSEL gain chips arranged in M ​​concentric rings (M>1). The beam-splitting axial conical lens group includes M beam-splitting axial conical lenses. The beam-combining axial conical lens group includes M beam-combining axial conical lenses. The N laser beams first pass through the beam-splitting axial conical lens group to generate M-order Bessel beams, and then pass through the beam-combining axial conical lens group to combine into a resonant beam. This resonant beam resonates within the coaxial resonant cavity formed by the output coupling mirror and the gain chip array, resulting in the output laser beam. This invention employs a modular cascaded structure of axial conical lenses, realizing the parallel superposition of multiple rings of chips, fully utilizing the radial spatial dimension, and improving chip integration density.

The invention discloses a spacecraft ground full-physical simulation system attitude measurement calibration method and device, and belongs to the technical field of spacecraft measurement. The objective of the invention is to solve the problem of real-time measurement of the attitude of a spacecraft ground full-physical simulation system. A cross laser generator, a concentric circular ring coding target, a monocular camera and a processing unit are fixedly installed on a three-axis air bearing table, the monocular camera is fixedly arranged on one side of the cross laser generator, and the monocular camera is connected with the processing unit. Laser emitted by the cross laser generator vertically irradiates the plane of the concentric circular ring coding target, the concentric circular ring coding target adopts a concentric circular ring coding array design, and each group of concentric circular ring coding units is composed of a plurality of hollow circular rings which are concentrically arranged. And generating a code ID of each group of concentric circular ring coding units through radius proportion combination of the adjacent hollow circular rings. The method is stable in long-term operation precision, greatly reduces the workload of element installation and calibration, does not need a complex field calibration process, and is flexible in installation and deployment.

The invention discloses a large-view-field compound eye telescopic system suitable for daytime observation, and belongs to the technical field of optical system design. The system comprises a primary mirror, a compound eye optical unit, a refraction correction mirror group unit and a photoelectric detector unit which are sequentially arranged along an optical axis. The compound eye optical unit adopts a light splitting reflection cube-corner prism structure, and divides a focal plane of a primary lens into X paths of sub-view fields; the refraction correction lens group unit comprises n correction lens groups with built-in field diaphragms; a concentric annular light barrier group is arranged on the inner wall of the primary mirror chamber. Large-view-field observation is realized through optical splicing of a compound eye structure, strong background stray light in the daytime is remarkably inhibited by utilizing a built-in view field diaphragm and combining multiple scattering absorption of a light barrier group, and the stray light coefficient of the system is lower than 1.11 * 10 <-7 >. The technical problem that an existing optical telescope cannot carry out high-contrast large-view-field observation in the daytime is solved, and all-weather monitoring of near-earth celestial bodies is achieved.

A collapsible camping stove is described that is lightweight and quick to assemble for cooking and putting away for storage. The collapsible camping stove includes telescoping rings with tabs of concentric rings inserted into slots of adjacent rings. The slots include horizontal and vertical portions so that the rings can be fastened in an expanded position by moving the tabs to the horizontal portions of the slots. A cooking grate is placed on top of an innermost telescoping ring. The outside cover covers the collapsible camping stove while fully collapsed. Methods of constructing the collapsible camping stove and methods of using the collapsible camping stove are also described.

The invention discloses a method for improving the light pillar depth of an operating shadowless lamp and a lamp panel structure. According to the method, by adjusting the included angle between the optical axis of each TIR lens unit and the central axis of a lamp panel, the circle center of a sub-light spot formed by each TIR lens unit at the preset working distance does not coincide with the central point of a target surgical field light spot, but is distributed on a virtual concentric circular ring with the central point as the circle center, and the target surgical field light spot is synthesized by splicing the multiple sub-light spots. The corresponding lamp panel structure comprises a lamp panel base body, a TIR lens unit array arranged along a plurality of concentric rings, a driving mechanism and a programmable controller. The limitation of a traditional concentric convergence mode is broken through, the light column depth of the operation shadowless lamp is remarkably improved, especially the light column depth of a minimum light spot mode, meanwhile, good illumination uniformity and a shadowless effect are kept, and the technical problems existing in the field for a long time are solved.

The application discloses a fan protective cover design method in the technical field of fan device manufacturing, and comprises the following steps: 1, obtaining the size of the fan protective cover outer frame and presetting the size of the center disc; 2, arranging the base rib between the center disc and the fan protective cover outer frame, and forming the concentric ring area among the center disc, the base rib and the fan protective cover outer frame; 3, arranging the radial rib in the ring area to be arranged, and arranging the first type of radial rib in the ring area close to the protective cover outer frame; the first type of radial rib satisfies that the shortest distance between any optional point on the radial rib and the adjacent radial rib in the same ring area changes by not more than 5%. The shortest distance between the radial ribs of the product manufactured according to the method changes little, the arrangement number and density of the radial rib can be reduced, and the ventilation area under the same condition can be improved.

The utility model relates to the technical field of bass loudspeakers, and discloses a concave-convex washer of a bass loudspeaker, which comprises a washer main body, a concentric boss is arranged at the center of the top of the washer main body, the boss is cylindrical, the height of the boss is 1 / 2 of the radius of the washer main body, the upper surface of the washer main body close to the boss is in a concentric annular recess to form a concave ring area, and the concave ring area is provided with a concave groove. The depth of the concave ring area is 1 / 2 of the height of the boss, four positioning holes surrounding the concave ring area at equal intervals are formed in the bottom of the concave ring area, three limiting grooves distributed annularly at equal intervals are formed in the outer wall of one end of the washer body, and a boss gasket is fixedly connected to the top of the boss. The sound transmission efficiency can be remarkably improved through the design of the boss and the concave ring area in cooperation with the coil, the washer body can be more stably and conveniently installed and used through the design of the equidistant surrounding positioning holes and the annular equidistant distributed limiting grooves, and the washer is more practical.

This invention discloses a method for intelligent temperature control in the hydrogel production process, specifically relating to the field of intelligent temperature control. It addresses the problems of uneven temperature distribution during heating, leading to asynchronous gelation and poor product consistency. The method involves periodically collecting and calculating changes in contact thermal resistance of the heating power of each temperature control unit in the heating plate array to identify the completion status of each region. Based on the spatial distribution of the heating support plane, concentric rings are constructed, and the differences in completion time within different rings are quantified to obtain a synchronization deviation index. Furthermore, for regions with significant deviations, lagging and leading units are identified, and their temperatures are compensated and reduced based on radial temperature gradients and boundary adjacency characteristics, respectively. This ensures that the gelation process in each region becomes more consistent, thereby achieving adaptive control of the temperature field and improving the stability and uniformity of the overall preparation process.

A photon source comprising:a quantum dot; and an optical cavity,the optical cavity comprising:a diffractive Bragg grating “DBG”; anda planar reflection layer,the DBG comprising a plurality of concentric reflective rings surrounding a central disk and at least one conductive track extending from the central disk across the plurality of concentric rings, the quantum dot being provided within the central disk and the planar reflection layer being provided on one side of the DBG to cause light to be preferentially emitted from the opposing side of the DBG.

This utility model relates to a tension sensor. The outer and inner rings of a force-bearing disc are connected by a deformation beam, with a deformation gap between them. A pressure strain gauge is mounted on the deformation beam and electrically connected to an external device. The inner ring of the inner ring is coaxially connected to a roller. The tension of the rolled material is transmitted to the inner ring via the roller. The inner ring shifts relative to the outer ring, causing the deformation beam to deform. The pressure strain gauge deforms synchronously, and the deformation signal is converted into an electrical signal and transmitted to the external device to characterize the tension of the rolled material. This tension sensor features a detachable bearing structure, improving its overall service life. The concentric ring design simplifies the mechanical structure of force transmission and reduces the space occupied by the tension sensor in the device. Furthermore, the structure connecting the outer and inner rings via the deformation beam allows the deformation beam to quickly provide deformation feedback when the inner ring is subjected to force, which is then fed back as a tension signal through the pressure strain gauge, resulting in high sensor sensitivity.

The invention relates to the technical field of casting atomization spraying, and discloses a coating atomization device for centrifugal casting of a corrosion-resistant cast iron cylinder liner, the coating atomization device comprises an atomization cylinder and further comprises a sealing assembly, and a liquid outlet pipe is fixedly mounted on the left side of the atomization cylinder; the sealing assembly comprises a concentric ring, a sealing plate, a limiting frame, a limiting spring, a rotating rod, a limiting ring and a limiting groove, the concentric ring is fixedly installed on the inner wall of the liquid outlet pipe, the limiting frame is slidably installed on the inner wall of the liquid outlet pipe, the sealing plate is fixedly installed on the left side of the limiting frame, and the limiting groove is aligned with the limiting frame when the limiting ring rotates; after the limiting frame is aligned with the limiting groove, the limiting ring releases the limiting of the limiting frame, and the limiting of the limiting frame can be released after stirring for casting spraying operation, so that the situation that atomized paint is thick and thin due to uneven components can be avoided, and the defect that spraying on the inner wall of a casting mold is uneven is overcome; therefore, the components of the corrosion-resistant layer on the surface of the cylinder sleeve casting are uniform.

This application provides a composite electric spindle, belonging to the field of electric spindle technology, which solves the problem that the axial movement accuracy of the inner and outer spindles in existing technologies is easily affected by heat accumulation during operation. The composite electric spindle of this application includes an inner spindle, an outer spindle, a load-bearing assembly, and a guide member. The dual-axis assembly includes an outer spindle and an inner spindle, with the inner spindle slidably connected within the outer spindle. The load-bearing assembly includes an inner carrier and an outer carrier. A guide cavity is formed between the inner carrier, the outer carrier, and the outer spindle. The guide member is located within the guide cavity and contacts / approaches the load-bearing assembly. The guide member acts on at least one of the second and first concentric rings to guide the sliding of the first concentric ring. This application solves the technical problem that the inner spindle cannot move smoothly after prolonged use, achieving the technical effects of stable guidance and immunity to heat accumulation.

The invention discloses a concentric ring roll sample table for a wide-angle X-ray diffractometer and a use method, and belongs to the technical field of X-ray diffraction analysis equipment.The concentric ring roll sample table comprises a base and a concentric ring sample table body arranged on the base, and the concentric ring sample table body comprises an external supporting seat and an internal rotating circular ring sleeve; the rotary circular ring sleeve is rotatably connected to the supporting seat through an angle adjusting mechanism, and the rotation axis of the rotary circular ring sleeve is configured to coincide with the direction of an incident X-ray beam, so that a sample fixed on the rotary circular ring sleeve can roll and rotate around an incident light path. Through the unique concentric ring design, it is ensured that the rotation axis of a sample coincides with an X-ray light path, the position of a measured point of the sample is constant in the rotation process, the side inclination range of 60 degrees is achieved through cooperation with the fine adjustment bolt, the measurement blank between vertical transmission and grazing incidence is filled, and the measurement precision is improved. And a key tool is provided for all-dimensional structure characterization of anisotropic materials.

The invention relates to an embroidery pattern for producing a mesh pocket to support an implant, specifically a breast implant, and / or tissue, specifically breast tissue, comprising a two-dimensional ring structure (1) with several spaced-apart concentric rings (1.1 - 1.13), each adjacent concentric ring (1.1 - 1.13) having several connections (2.1 - 2.12), wherein the connection length of the connections (2.1 - 2.12) formed between adjacent concentric rings, extending from one of the inner concentric rings (1.1 - 1.12) to the outer concentric ring (1.13), increases, at least in certain areas, relative to the distance between the respective adjacent concentric rings (1.1 - 1.13). The invention further relates to a method for producing the mesh pocket, wherein the embroidery pattern is stitched onto a substrate and the substrate is subsequently removed.The net pocket is finally formed by concentric twisting of the concentric rings (1.1 - 1.13).

The invention relates to the technical field of robot environment perception, in particular to a real-time ground segmentation method and system. The method comprises the following steps: receiving and preprocessing laser radar point cloud data, and dividing the data into a plurality of concentric annular areas; carrying out adaptive ground fitting on each area and processing the multilayer structure through vertical plane fitting to obtain an initial ground point set; correcting an under-segmentation region of the current frame by using a time sequence backspacing mechanism and updating parameters; constructing an elevation map based on the initial point set, and obtaining a fine ground point set through adaptive resolution CSF simulation; and carrying out confidence evaluation on the two types of point sets, and generating a final result through multi-criterion fusion. Accurate segmentation of the complex terrain is realized, and robustness and real-time performance of a dynamic environment are improved.

This invention belongs to the field of laser processing, specifically relating to a method for preparing concentric ring micropores using a femtosecond Bessel beam for polymer thin films. The method includes: guiding a Bessel beam, consisting of a central core and multiple concentric rings surrounding it, onto the surface of a polymer thin film deposited on a transparent substrate; adjusting the single-pulse energy to selectively activate the central core of the Bessel beam, or a combination including the central core and one or more peripheral concentric rings, such that the energy density of the activated region exceeds the ablation threshold of the polymer thin film, thereby forming a micropore in the polymer thin film under the action of a single pulse; wherein the pore size of the micropore is determined by the activated central core or the combination thereof, and the micropore is a low aspect ratio hole with a depth substantially equal to the thickness of the polymer thin film, without damaging the transparent substrate. By controlling the activation of the concentric rings of the Bessel beam, the pore size and shape characteristics can be regulated.

The utility model provides horizontal double-sided electroplating equipment for a panel and a semiconductor circuit, which comprises a machine table with a circular ring rotating structure, and an electroplating mechanism is arranged in the middle of the circular ring rotating structure. The lower cavity structure is fixed to the machine table, the middle cavity structure surrounds the periphery of the lower cavity structure, the upper cavity structure is arranged above the middle cavity structure in a lifting fit mode, the middle cavity structure is arranged on the circular ring rotating structure in a rotating fit mode, and the upper cavity structure is arranged above the middle cavity structure in a lifting fit mode. The lower end of the upper cavity structure and the upper end of the lower cavity structure are respectively divided into a plurality of concentric annular independent anode areas; and the middle cavity structure comprises a plurality of cathode connecting sheets arranged on the circular ring rotating structure, a cathode ring arranged at the upper ends of the plurality of cathode connecting sheets, and a cathode conduction clamp module arranged on the cathode ring. The utility model relates to the field of TVG electroplating technology.

This invention relates to a planar superlens for spaceborne terahertz detectors. The planar superlens comprises an independent aluminum foil, on which an array of resonant units arranged in concentric rings is disposed. The resonant unit array includes various C-shaped resonant units with different structural parameters, each C-shaped resonant unit being a C-shaped hole structure etched into the aluminum foil. C-shaped resonant units with the same structural parameters are arranged at equal intervals on a ring band with the same arrangement radius, forming, from the inside out, a paraxial fine control module, a mid-ring band phase compensation module, a mid-to-far ring band phase modulation module, and an edge region phase coverage module. Compared with existing technologies, the superlens proposed in this invention has outstanding features such as large depth of focal length, tight focusing, lightweight, low cost, and resistance to space environments. It is particularly suitable for integration into terahertz detection payloads of meteorological satellites, which are extremely sensitive to weight and volume, and can be used for remote sensing missions such as ice cloud detection and atmospheric composition spectral line observation.

A drinking glass coaster has a circular substrate with a flat topside and a concave underside having a perimeter lip configured to make contact with a table top and at least one concentric ring attached to the concave underside and the flat topside and comprising a reusable sticky substance for adhering to a bottom of a drinking glass.

The application belongs to the technical field of ophthalmic medical instruments, and provides a corneal topography measurement method, an instrument, an electronic device and a program product, the corneal topography measurement method obtains the corneal diameter and the corneal vertex of the eye cornea of a detected object; determines the distance between the corneal vertex and the vertex of a Placido disc, determines the eccentricity of the Placido disc; determines the shape of the Placido disc according to the eccentricity of the Placido disc, and determines the ring number of the Placido disc according to the corneal diameter; collects the corneal topography imaging after the concentric ring on the Placido disc is reflected on the corneal surface of the detected object; based on the shape and the ring number of the Placido disc, analyzes a plurality of concentric rings contained in the corneal topography imaging, and obtains the corneal topography data of the detected object. The accuracy of measuring the corneal topography is improved, so that the micro-landscape features of the corneal surface can be more accurately obtained.

The invention belongs to the field of pretightening force detection, and discloses a bolt pretightening force wireless intelligent monitoring system based on an ink-jet printing strain sensor. The strain sensor is directly printed and packaged on the surface of the bolt head by adopting an electrojet ink-jet printing technology; the overall thickness of the strain sensor is lt; 30 [mu] m; the strain sensor is of a full-bridge structure formed by concentric rings and peripheral radial fences, and can collect radial strain in multiple directions at the same time and achieve temperature self-compensation. The structure of the multi-layer shell and the chuck bulge can realize protection, assembly and disassembly in a limited installation space, and is in interference fit with a bolt head, so that the module and the bolt are integrated, and lead-out wires are reduced; the flexible circuit board can be better attached to the shell, the thickness is reduced, stress concentration on the device due to tiny deformation generated by bolt loading can be relieved, and the reliability is improved; an intelligent power management module is designed, duty ratios of a working mode and a sleep mode of the system can be adaptively adjusted, power consumption is reduced, and the service life of a power supply is prolonged.

This utility model discloses a concentric ring composite structure heated cigarette, belonging to the field of heated cigarette technology. It includes a smoke-generating carrier, which is configured as a hollow tobacco segment. One end of the hollow tobacco segment has a concentric ring structure, and the other end has a guide member. An insertion cavity is axially provided in the center of the guide member. A concentric ring structure has a concentric rod axially provided in the center of the concentric ring structure. A first covering layer is provided on the outside of the concentric ring rod, and a filter material is annularly covered on the outside of the first covering layer. A second covering layer is then provided on the outside of the filter material. This utility model increases the central suction resistance of the cigarette by adding a concentric ring structure to the cigarette structure, improving the interception of large aerosol particles in the smoke. Simultaneously, it allows for thorough mixing of the smoke, resulting in a finer and smoother smoke. The filter end can be fully utilized, and during inhalation, it accelerates the heat transfer rate between the heat source and the smoke-generating carrier.

The utility model discloses a concentric ring venting plug for a low-pressure casting die, which is formed by sleeving an inner core and a plurality of outer rings with gradually increased diameters, a venting gap is arranged between the adjacent outer rings, and the outer rings comprise a first outer ring, a second outer ring, a third outer ring and a fourth outer ring from inside to outside in sequence; two outer exhaust grooves are symmetrically formed in the upper ends of the first outer ring, the second outer ring, the third outer ring and the fourth outer ring in the axial direction, exhaust ports are selectively formed in the bottoms of the outer exhaust grooves, and a circle of joint face exhaust grooves are formed in the lower ends of the first outer ring, the second outer ring, the third outer ring and the fourth outer ring in the circumferential direction. The exhaust plug can solve the problems that an existing exhaust plug is low in exhaust efficiency, complex in structure, prone to blockage and poor in product percent of pass due to uneven exhaust.

The utility model relates to the technical field of semiconductor manufacturing equipment, in particular to a silicon carbide epitaxial furnace wafer tray which comprises a base body made of silicon carbide materials, and a wafer fixing structure comprises at least two circles of protruding supporting points which are arranged on the surface of the base body in a concentric and annular mode. The airflow channel comprises a plurality of protruding supporting points formed in the center area of the base body and concentrically and annularly arranged through holes, so that the contact area is reduced, large-area attachment of the wafer and the surface of the tray is avoided, thermal stress accumulation is reduced, meanwhile, wafer sliding is prevented, the through holes form a gas vertical flowing channel, reaction gas is promoted to be evenly diffused to the surface of the wafer, and the yield of the wafer is improved. The edge spiral flow guide grooves guide gas to flow along a spiral path, the temperature field uniformity of the edge and the center area of the wafer is improved, the bottom reinforcing ribs are of a radial and circular ring crossed structure, and the overall rigidity of the tray is improved by dispersing a thermal stress concentration area and restraining buckling deformation of the base body at the high temperature.