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632 results about "Surface reflection" patented technology

Machine vision-based intelligent detection method for galvanized steel surface defects

The invention discloses a machine vision-based intelligent detection method for steel galvanized surface defects, which comprises the following steps: S1, acquiring and preprocessing a steel galvanized surface image to obtain a standardized image; s2, constructing a specular reflection probability graph according to the brightness distribution and the gradient magnitude, and calculating a reflection intensity value; s3, calculating a structure tensor matrix, determining a main direction angle and an anisotropic consistency coefficient, and generating a direction feature matrix; s4, establishing a multi-scale direction adaptive phase kernel function, and performing phase modulation in a frequency domain by adopting an improved phase stretching transformation algorithm; s5, inverse Fourier transform is executed, and a phase response matrix is extracted; s6, performing weighted fusion to obtain a comprehensive phase response diagram; and S7, setting a threshold value according to the noise variance and the statistical characteristics, executing binarization and morphological processing, and outputting a defect region and boundary coordinates. According to the invention, high-precision identification and boundary positioning of steel galvanized surface defects are realized.
Owner:SHANDONG CHUANGMEITE NEW MATERIALS CO LTD

Electronic component defect detection method, system and device

The invention relates to the technical field of defect detection, and particularly discloses an electronic component defect detection method, system and device, and the method comprises the steps: collecting a multiband original image set based on multispectral imaging, inhibiting batch material difference and surface reflection through orthogonal complementary space projection, and obtaining a de-noised image set; performing feature extraction on the de-noised image set, and identifying and marking all fragmented defect areas; based on a graph neural network space attention mechanism, establishing an association relationship between fragmented defect areas to form a complete defect feature chain; gray frequency value sequences of the to-be-detected image and the standard sample image are constructed respectively, and a first fitting curve and a second fitting curve are obtained through fitting of a skewed distribution function; and finally, comprehensively judging whether the electronic component has defects or not by combining the defect characteristic chain and the difference characteristics of the two fitting curves. According to the method, interference can be effectively suppressed, fragmented defects can be accurately identified, and the detection accuracy and reliability are remarkably improved through multi-dimensional feature fusion.
Owner:FOSHAN HENGXIANG SAFETY TECHNOLOGY CO LTD

Appearance defect detection system and method based on CCD image recognition

The invention provides an apparent defect detection system and method based on CCD image recognition. A specular reflection interference area meeting a preset difference condition is recognized through a first surface reflection image and a second surface reflection image of a target patch element; extracting corresponding orthographic gray scale data from a third surface orthographic image obtained by adopting coaxial light source irradiation based on the specular reflection interference area; according to the brightness distribution gradient of the specular reflection interference area in the first surface reflection image and the second surface reflection image, constructing a texture restoration guide map, and using the texture restoration guide map to carry out texture restoration on the orthographic gray scale data to generate a texture restoration image of the specular reflection interference area; and generating a defect identification reference image for eliminating specular reflection interference based on the texture repair image, and outputting an appearance defect identification result of the target patch element by the defect identification reference image. According to the technical scheme provided by the invention, the defect detection of the patch element can be realized under the interference of mirror reflection.
Owner:SHENZHEN SANYILIANGUANG INTELLIGENT EQUIP CO LTD

Low-profile dual-circularly polarized wave beam scanning folding reflection array antenna

The invention discloses a low-profile dual-circularly polarized wave beam scanning folding reflection array antenna. The low-profile dual-circularly polarized wave beam scanning folding reflective array antenna comprises a lower reflective array antenna and an upper circularly polarized selection metasurface. A circular polarization plane feed source is integrated in the middle of the reflective array antenna, and beam deflection is achieved. The circular polarization selection metasurface introduces opposite phase gradients to a left-hand circular polarization wave beam and a right-hand circular polarization wave beam through spin decoupling, and then introduces opposite wave beam deflection angles. Meanwhile, due to the polarization selection function of the circular polarization selection metasurface, the profile height of the antenna is half of the focal length of a traditional reflective array. By rotating the lower-layer reflective array antenna and the upper-layer circular polarization selection metasurface, the antenna can realize simultaneous + / -42-degree pitch angle scanning and 360-degree azimuth angle scanning of left-hand circular polarization and right-hand circular polarization dual beams, and the aperture efficiency, the axial ratio, the scanning loss and other performances are good. The low-profile dual-circularly-polarized wave beam scanning folding reflection array antenna provided by the invention can realize simultaneous scanning of two circularly-polarized wave beams, and is low in profile, compact in structure, low in cost and novel in function.
Owner:NANJING UNIV OF SCI & TECH

Surface inspection tool for transfer tools and methods of using the same

A surface scanning tool and methods of using a surface scanning tool to determine a surface shape of a tool. In embodiments, the surface scanning tool includes a laser, a detector, and a signal analysis module. The laser sends a beam of light that is reflected off a bottom surface of the tool. The detector receives the reflected beam of light and sends the reflected beam of light signals to a signal analysis module. The signal analysis module determines a surface shape of the bottom surface and triggers mitigation actions. In alternative embodiments, the surface scanning tool includes a camera and a signal analysis module. The camera takes a picture of the bottom surface of the tool and sends the image to the signal analysis module. The signal analysis module determines the surface shape of the bottom surface and triggers mitigation actions.
Owner:TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

Enhancing non-terrestrial network direct-to-everything service with metasurfaces

The technology described herein is directed towards a metasurface (reconfigurable intelligent surface) that can be used to redirect signals to and from non-terrestrial network satellites. The metasurface can be passive, and provide signal array gain with respect to indoor user equipment sending and receiving signals to and from the network satellites. The metasurface can be portable for use in various scenarios. Further, the metasurface can be configured to operate in a transmission mode, in which incoming signal is passed through the metasurface, or can be reconfigured to operate in a reflection mode, in which incoming signal is reflected by the metasurface. Different phase shifts of the metasurface's unit cells result in array gain through constructive interference, by refraction in the transmission mode, or reflection in the reflection mode. The presence or absence of a removable back plane determines the transmission or reflection operating mode of the metasurface.
Owner:DELL PROD LP

Industrial robot posture recognition method

The invention relates to the technical field of industrial automation, in particular to an industrial robot posture recognition method. Aiming at the problems of weak workpiece texture, strong surface reflection, serious stacking and shielding and the like in an industrial production line, a pixel-level dense feature fusion and self-attention mechanism is introduced, and semantic texture information of a color image and spatial geometric information of a depth image are integrated in a feature extraction stage; the problem that the posture of a rotationally symmetrical workpiece is fuzzy is solved through an asymmetric loss function, meanwhile, a comprehensive grabbing scoring model containing force sealing stability, environment collision risk probability, mechanical arm kinematics reachability and visual uncertainty is further established, and through the mode of combining off-line grabbing candidate construction and on-line real-time evaluation, the grabbing accuracy of the mechanical arm is improved. And the globally optimal grabbing pose is screened out. According to the method, the recognition precision and robustness of the industrial robot in the unstructured environment are remarkably improved, and the success rate and safety of grabbing operation are improved.
Owner:HUIDING EDUCATION TECH (SHANGHAI) CO LTD

Coaxial transceiving line scanning three-dimensional profile measurement system and method based on coherent interference

The invention discloses a coherent interference-based coaxial transceiving line scanning three-dimensional profile measurement system and method. The system comprises a low-coherence light source; the beam splitter is used for collimating light emitted by the low-coherence light source and then dividing the light into two paths; the measuring light is focused into a linear light beam through the cylindrical lens and is emitted to the surface of the to-be-measured sample, and the measuring light reflected by the surface of the to-be-measured sample returns to the beam splitter along the original path; the reference light is emitted to a reference mirror with a certain inclination angle and is reflected back to the beam splitter through the reference mirror; the measuring light reflected by the surface of the sample to be measured and the reference light reflected by the reference mirror are subjected to beam combination interference through a beam splitter and are imaged to enter a camera for interference pattern acquisition; the signal processing system is used for processing the interference patterns to obtain height distribution of the to-be-measured sample on a line field, and three-dimensional profile measurement of the to-be-measured sample is realized by transversely moving or transversely scanning the to-be-measured sample and overlapping the interference patterns measured at different positions. Therefore, high-efficiency measurement can be realized while the micro-nano precision is kept.
Owner:TSINGHUA UNIVERSITY

Refraction assisted radio frequency phased array reflector systems

Provided herein are various enhancements for radio frequency antennas and antenna arrangements. In one example, an apparatus comprises a reflector for radio frequency energy having a reflector surface, and a lens element. The lens element is configured to alter a distribution of at least a portion of the radio frequency energy reflected by the reflector surface over a detection area of a feed array positioned a selected distance from the lens element.
Owner:LOCKHEED MARTIN CORP

Drowning detection method and system combining polarization multiple modes

The invention discloses a drowning detection method and system combined with polarization multiple modes, belongs to the technical field of drowning detection, and aims to solve the problem of low accuracy caused by the influence of water surface reflection and complex water environment in the existing method. The method comprises the following steps: collecting a polarization degree map and an intensity map of a swimmer; inputting the two images into a pre-trained polarization fusion network, and obtaining a fused image through feature extraction, fusion and reconstruction; training a target detection network combined with polarization fusion features by using a simulated drowning scene video / image shot by a polarization camera; and inputting the fused image into the trained detection network, and judging whether drowning occurs or not. The method eliminates water surface reflection, improves image information integrity and detection accuracy, adapts to multiple scenes, and is suitable for intelligent drowning detection in places such as swimming pools and bathing beaches.
Owner:XI AN JIAOTONG UNIV

Automatic screening method and system for automobile fastener generation

The invention relates to the technical field of automatic sorting, in particular to an automatic screening method and system for automobile fastener generation, and the method comprises the following steps: judging an end face orientation through double-angle reflection, detecting outer diameter ellipse offset by using radial radius difference, judging thread flattening by combining a multi-angle valley bottom reflection attenuation sequence, and determining a scratch direction according to a surface multi-angle peak position offset track. According to the method, end face orientation classification is achieved through double-angle reflection difference, direction identification is established, elliptic offset characteristics are extracted through radial radius difference distribution, and a flattening section is positioned through a multi-incidence-angle valley bottom reflection attenuation sequence; a surface reflection peak position forms a continuous direction track in an angle sequence and outputs a scratch coordinate, defect judgment and motion time calculation are linked, sequential compensation is performed by combining a conveying speed and nozzle lag, and multi-stage pressure tracks are matched according to mass grouping, so that the posture adaptability and the fine defect detectability are enhanced, and the defect detection precision is improved. And the full-cycle detection consistency and the classification rejection stability are improved.
Owner:ZHEJIANG RUIQIANG AUTO PARTS CO LTD

High-precision measurement method for radial speed of shallow sea underwater acoustic target based on ray sound field reconstruction

The invention relates to the technical field of communication, in particular to a high-precision measurement method for radial velocity of a shallow sea underwater acoustic target based on ray sound field reconstruction, which comprises the following steps of: establishing a three-path propagation model comprising direct arrival, water surface reflection and seabed reflection, and constructing a joint representation equation comprising channel impulse response and target motion parameters by the path propagation model; according to the method, a space-time joint representation model of multipath sound rays is constructed, and the limitation of a traditional single-path model is broken through by quantifying the coupling relation between propagation time delay and Doppler frequency shift of different paths; the development provides a new technical means for underwater target tracking and positioning, underwater acoustic communication Doppler compensation and marine environment dynamic monitoring, and especially has an important application prospect in the fields of underwater unmanned cluster collaboration and the like.
Owner:HARBIN ENGINEERING UNIVERSITY SANYA NANHAI INNOVATION & DEVELOPMENT BASE

Double-antenna BDS-R real-time water level monitoring method and integrated device

The invention relates to a double-antenna BDS-R real-time water level monitoring method and an integrated device, and belongs to the technical field of GNSS remote sensing. The method comprises the following steps: data acquisition; data processing: firstly decoding the received data, and extracting a double-frequency pseudo range and a carrier phase observation value; a second step of performing quality control on the decoded data, including constraint of an elevation angle and an azimuth angle, cycle slip detection and the like, and eliminating non-water-surface reflection signals and abnormal data; a third step of establishing a double-difference observation equation based on the pseudo-range and carrier phase observation value, introducing a horizontal baseline constraint into the observation equation, and enhancing the resolving stability through virtual observation quantity; fourthly, Kalman filtering is used for achieving per-epoch baseline estimation, and a least square ambiguity decorrelation adjustment (LAMBDA) method is used for solving a baseline fixed solution; and finally calculating the water level of the current epoch by using the baseline vector. And transmitting data. According to the invention, the problems of poor real-time performance, complex deployment and high cost in the existing water level monitoring technology are solved.
Owner:NAT TIME SERVICE CENT CHINESE ACAD OF SCI

Method for preventing micro-deformation of backlight FPC of LCM (Liquid Crystal Module)

The invention relates to the technical field of manufacturing of electronic components, and discloses an LCM (liquid crystal module) backlight FPC (flexible printed circuit) micro-deformation prevention method, which comprises the following specific steps: S1, implementing large-area copper laying design on an element surface of a flexible printed circuit board, and covering a main area of the element surface with uniformly distributed copper foils to form a continuous conductive layer with consistent thickness, while the conductive layer bears electrical connection of the LED light source, the surface reflection characteristic of the conductive layer is optimized, and the phenomenon of uneven light reflection caused by surface fluctuation is reduced. Through the large-area copper laying design of the element surface and the S-shaped isolation interval layout, thermal stress is effectively guided to be symmetrically distributed in multiple directions and offset each other, plane micro-deformation of the FPC under thermal circulation is remarkably restrained, the deformation quantity is controlled within 50 micrometers, the problems of stress concentration and deformation amplification caused by linear intervals in the prior art are solved, and the reliability of the FPC is improved. And long-term stability and optical performance of the backlight module are ensured.
Owner:SHENZHEN K&D TECHONOLOGY

Dynamic refraction visual correction method for ultra-shallow water blue-green laser sounding

The invention discloses an extremely shallow water blue-green laser sounding dynamic refraction vision correction method, which belongs to the technical field of marine surveying and mapping and underwater detection, is used for laser refraction correction, and comprises the following steps: synchronously acquiring binocular images and inertial measurement unit attitude data, and generating a three-dimensional point cloud; according to a light spot area in the laser emission angle index point cloud, fitting a micro-tangent plane to obtain a water surface original normal vector; calculating a confidence coefficient weight according to the image texture definition, and iteratively calculating an optimal estimation normal vector based on the original normal vector and the weight; calculating a real incident angle according to the optimal estimation normal vector and the laser emitting direction; calculating the direction vector of the underwater refracted light according to the Snell's law; and calculating the underwater three-dimensional coordinates of the target point by combining the propagation distance of the laser in the air and the water and the emission origin coordinates. According to the method, the visual confidence is introduced, so that the problem of data failure when the traditional visual sounding encounters water surface reflection, glare or broken waves is solved, and the robustness under the complex sea condition is remarkably improved.
Owner:SHANDONG UNIV OF SCI & TECH

Ultrathin printed circuit board defect detection method and system based on AI vision

The invention relates to the technical field of artificial intelligence and electronic manufacturing detection, and discloses an ultra-thin printed circuit board defect detection method and system based on AI vision. The objective of the invention is to solve the technical problems of poor imaging quality, high missed detection and false detection rate, weak generalization ability and difficulty in consideration of efficiency and precision caused by buckling deformation, surface reflection and tiny and diverse defects of an ultrathin printed circuit board in the existing detection technology. The method comprises the following steps: performing multi-angle image acquisition through a composite illumination module and a high-resolution linear array camera; geometric correction is carried out on the image by using an SIFT algorithm and affine transformation, and the image contrast is enhanced by using a CLAHE algorithm; generating a defect candidate region through the lightweight full convolutional network; and carrying out accurate classification and identification on the candidate region by using a deep residual network. According to the technical scheme, high-precision, high-efficiency and low-false-alarm detection of the tiny defects of the ultrathin printed circuit board can be achieved, and the automation level and adaptability of detection are remarkably improved.
Owner:JIANGSU BOMIN ELECTRONICS

Coated glass carrying control method and system

The invention relates to the technical field of transportation devices, and discloses a coated glass carrying control method and system, and the method comprises the steps: respectively collecting surface reflection spectrum data, dimension specification parameters and carrying force arm information; extracting film layer combination characteristics, and carrying out bearing capacity calculation by combining dimension specification parameters and carrying force arm information to obtain a theoretical stress extreme value; acquiring a pressure rise rate and a steady-state leakage rate, and performing airtight characteristic inversion on the coated glass based on the pressure rise rate and the steady-state leakage rate to obtain an interface adsorption efficiency value; carrying out constraint boundary fusion on the theoretical stress extreme value and the interface adsorption efficiency value to obtain a double constraint envelope; time sequence deduction is conducted on the mechanical arm based on double constraint envelope, and a space motion time sequence is obtained; a self-adaptive inertia carrying instruction is generated based on the space motion time sequence; the carrying stability of the coated glass can be improved.
Owner:TANGSHAN DAXIN WAREHOUSING & LOGISTICS CO LTD

Polarimetric brdf characterization apparatus and method

Polarization BRDF characteristic measuring device and method, belong to optical measurement technical field, the present application is to solve the existing BRDF or polarization BRDF measurement slow, low efficiency problem of measurement.The scheme of the present application: the laser light source at the second focal point emits laser light vertically through the circularly polarized light generating system and the polarizing system, the circularly polarized light generating system converts the laser light emitted by the laser light source into circularly polarized light, the polarizing system quantitatively changes the polarization state of the circularly polarized light to form the measuring incident light, the incident light is transmitted through the transmission light of the half mirror, and is reflected by the ellipsoidal mirror to the surface of the sample to be measured at the first focal point, the reflected light wave of the surface of the sample to be measured is reflected again by the inner surface of the ellipsoidal mirror, and is transmitted to the second focal point direction and is reflected by the half mirror, and the reflected light wave is converged to the third focal point of the measuring system through the polarizing system, the polarizing system is adjusted with the polarizing system, and the polarization BRDF characteristic of the sample to be measured is measured.
Owner:HARBIN INST OF TECH

Visual inspection sorting method and system for surface defects of intelligent electric meter shell injection molding parts

The invention discloses a visual inspection sorting method and system for surface defects of intelligent electric meter shell injection molded parts, and relates to the technical field of visual inspection, and the method comprises the following steps: selecting an intelligent electric meter shell as a reference part, dividing the surface of the shell into a plurality of functional partitions, collecting structured light form and brightness information, and obtaining a reference appearance map; and positioning a to-be-detected electric meter shell to a position consistent with the reference part, obtaining the online three-dimensional form and brightness response of each functional zone, mapping the online three-dimensional form and brightness response to the reference appearance map, marking a stable mirror surface with high brightness, and interpolating along an observation track to generate an online appearance map. According to the invention, through functional partition sampling layout of a window sealing area, a wiring terminal area, a stud and reinforcing rib area, a nameplate and two-dimensional code area and a general decoration side wall area, and in cooperation with double-light-source collection of diffused light and oblique incident light combined with structured light, a reference appearance map containing a highlight tolerance mask is constructed; stable characterization of mirror reflection and a transparent window is realized, and false detection caused by high brightness of the mirror surface is remarkably reduced.
Owner:ZHUHAI AIPU TECH CO LTD

Metal cavity part additive and subtractive alternate mixed manufacturing deformation measuring and planning method

The invention discloses a method for measuring and planning deformation in additive and subtractive alternate mixed manufacturing of metal cavity parts. According to the additive and subtractive mixed manufacturing technology, by combining the design freedom degree of additive manufacturing and the high precision advantage of subtractive manufacturing, complex cavity parts can be effectively machined, but accumulative stepped deformation can be caused by the repeated thermodynamic effect and alternate procedures; according to a traditional optical measurement method, measurement data are difficult to completely capture due to the problems of internal shielding and surface reflection of a cavity, and point cloud registration errors exist. According to the method, multi-axis on-machine measurement is embedded into an additive and subtractive alternate process sequence, a measurement point directly comes from a cutter contact of a cutting path, the multi-axis on-machine measurement precision and the measurement accessibility of a deep cavity structure are ensured, and a measurement path is optimized by combining probe attitude planning and a customized traveling salesman algorithm; the probe and the cutter share the same coordinate system, so that the point cloud registration link required by optical measurement is eliminated, and the data precision is remarkably improved.
Owner:SOUTHEAST UNIV

Light guide and light guide assembly

A light guide includes: a light entrance section which has a light entrance surface to which light is input, reflective surfaces and a light transmitting section, the reflective surfaces reflecting a part of the light input, and the light transmitting section transmitting another part of the light input and reflected light reflected by the reflective surfaces; a light guiding section which has a light exit surface, and guides the reflected light so that it is output from the light exit surface; and a continuous section and a non-continuous section. A large part of the light collected by the light entrance section can be output from the light exit surface, by a part of the light input being reflected by the reflective surfaces and the reflected light entering the light guiding section from the light transmitting section via the continuous section to be guided within the light guiding section.
Owner:HONDA MOTOR CO LTD

Segmented display with photon recycling cavity

ActiveUS12576779B2Static indicating devicesOptical signallingGraphicsPhoton recycling
A display includes a first housing portion having graphic openings and a second housing portion spaced apart from the first housing portion. A first circuit board has LEDs and is disposed between the first and second housing portions. A first side wall and a second side wall define photon recycling cavities in a sequence wherein adjacent photon recycling cavities have a shared end wall an LED. The first side wall has a first angular surface and the second side wall has a second angular surface. The first angular surface and the second angular surface redirecting light from an associated LED of the plurality of LEDs so that light from the plurality of light emitting diode is indirectly communicated through the graphic openings after reflecting from the first angular surface and the second angular surface.
Owner:ELUMIGEN LLC

Large-flux in-situ detection method for flatness of spliced detector

The invention provides a spliced detector flatness large-flux in-situ detection method which comprises the following steps: a light source emits a light beam which is compressed by a cylindrical lens, then is dispersed by a dispersion prism and respectively enters the edges of two adjacent detectors, and the two light beams are reflected by the surfaces of the detectors and then converge to generate dispersion stripes; a fixed difference calibration mode is adopted to calibrate stripe slope singularity caused by edge stripe variation in the dispersion stripe forming process; a band elimination filter is used for generating band elimination of a specific wave band in the dispersion fringes, and the channel spectrum is tested by analyzing the characteristics of the band elimination; the edge position of each detector is finely adjusted by using a dispersion prism, and the edge position of each detector is adjusted through deviation of a pupil position in combination with multi-point light emitted from one side of a wide-angle optical system by using an optical fiber interconnection system. According to the invention, the confocal and co-phase adjustment speed and precision of the spliced detector are greatly improved, and the regulation and control requirements of extremely high information flux and rapid convergence of a large-aperture system are met.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Lidar performance test system

A LiDAR performance test system according to the present invention comprises a target that can rotate vertically or horizontally and a LiDAR device disposed to be spaced a predetermined distance apart from the target. The LiDAR device comprises: a transmitter for emitting light toward the surface of the target; and a receiver for receiving the light reflected from the surface of the target, wherein the target is disposed such that the path of light emitted from the transmitter toward the surface of the target and the path of reflected light received from the surface of the target by the receiver do not match or overlap. According to the present invention, the system for testing the performance of LiDAR by considering the surface reflection characteristics of the target is provided, and thus can contribute to improving the accuracy and reliability of LiDAR performance.
Owner:LG INNOTEK CO LTD

Large-size PBX curing process non-contact polarization image measuring device and method

PendingCN121521763APolarisation-affecting propertiesLight energyPolarimetry
The invention discloses a non-contact polarization image measuring device and method for a large-size PBX curing process. The non-contact polarization image measuring device comprises a three-dimensional sample table, a diaphragm, a zoom lens, a micro-polarization array and a detector which are arranged along a light path direction, a sample to be tested is placed on the three-dimensional sample table, and the center of the sample to be tested coincides with the center of the three-dimensional sample table; the diaphragm realizes normalization processing of emergent light energy by regulating and controlling the intensity of reflected light on the surface of the sample; the zoom lens collects normalized emergent light to the surface of the micro-polarization array, and is adjusted and matched with the z-axis of the three-dimensional sample table to realize scanning imaging of a to-be-detected sample in the depth direction; the detector acquires a linear polarization image. According to the method, the PBX is measured through non-contact polarization, high-precision characterization analysis of the PBX curing process is completed by calculating key parameter (polarization angle and polarization degree) changes caused by curing, and the problems of pollution, large error and high danger of a sample in traditional contact measurement are solved.
Owner:XIAN MODERN CHEM RES INST

Acoustic detection system and analysis method for wall thickness uniformity of soda-lime glass tube

The invention relates to the technical field of glass tube detection, in particular to an acoustic detection system and an analysis method for the wall thickness uniformity of a soda-lime glass tube. The acoustic analysis method comprises the following steps: transmitting a pulse electromagnetic wave, receiving a reflection signal reflected from the surface of the soda-lime glass tube, and converting the reflection signal into an electric signal; performing variational mode decomposition on the electric signal, calculating variance contribution rate of each function to screen an objective function, reconstructing the signal based on the objective function and extracting an envelope curve; identifying adjacent peak points of the envelope curve, recording a time difference, and calculating the wall thickness; selecting a plurality of measuring points on the same section of the soda-lime glass tube to obtain the wall thickness of each point, and calculating the maximum value, the minimum value and the average value to evaluate the uniformity; the acoustic detection system comprises a signal acquisition module, a signal processing module, a wall thickness calculation module and a uniformity analysis module. In this way, the effect of improving the acoustic detection efficiency and precision of the wall thickness uniformity of the soda-lime glass tube is achieved.
Owner:CHONGQING ZHENGQING PHARM PACKAGING CO LTD

Low-profile metasurface reflectors

The integrated optical structure includes a frequency-selective reflecting structure disposed between a decorative cover layer and an underlying metal layer. The underlying metal layer is configured to reflect and / or absorb radio frequency electromagnetic waves transmitted by the decorative cover layer and the frequency-selective reflecting structures. Each of the frequency-selective reflecting structures includes a frequency-selective surface layer having metal elements arranged on a multilayer stack and repeated across the frequency-selective surface layer to form an array. The integrated optical structure reflects collimated incident RF electromagnetic waves having a wavelength in the range of 1.0 mm to 10 cm and incident at an incident angle at a reflection angle different from the incident angle as collimated reflected waves. For normally incident light having a first visible wavelength, the frequency-selective reflecting structure has an optical transmittance greater than 50%.
Owner:3M INNOVATIVE PROPERTIES CO

Mobile phone appearance multi-angle automatic detection system and method based on multi-surface reflection structure

The invention relates to the technical field of physical property testing, and discloses a mobile phone appearance multi-angle automatic detection system and method based on a multi-face reflection structure, and the system comprises a panorama collection unit which obtains an original panorama image formed by a to-be-detected mobile phone through a multi-face panorama reflection mechanism; the reference data storage unit is used for storing standardized three-dimensional model data of the mobile phone to be tested; the central processing unit is used for establishing the three-dimensional model data as a space measurement reference, constructing an optical path mapping matrix according to the distribution parameters, mapping a surface grid of the three-dimensional model data to a camera coordinate system to determine geometric distortion sampling coordinates, extracting pixels to complete space topology reconstruction, and generating a standardized surface expansion view; according to the invention, nonlinear perspective distortion in reflection imaging is eliminated, tight alignment of pixel sites and physical topology is realized, and physical balance with objective scales is provided for quantitative analysis of flaws.
Owner:XIAN TENGWEI COMPUTER SYST CO LTD

All-solid-state battery thin-layer electrode device for multi-mode in-situ interface research and application of all-solid-state battery thin-layer electrode device

The invention relates to an all-solid-state battery thin-layer electrode device for multi-mode in-situ interface research. The all-solid-state battery thin-layer electrode device comprises the following components: a solid electrolyte substrate; the functional thin layer is arranged on the surface of the solid electrolyte substrate; the functional thin layer has conductivity; the functionalized thin layer allows a detection signal of an in-situ characterization technology to effectively penetrate or be reflected from the surface of the functionalized thin layer; the in-situ characterization techniques include atomic force microscopes, optical microscopes, and Raman spectroscopy, X-ray photoelectron spectroscopy, infrared spectroscopy, or X-ray diffraction. The invention provides a universal thin-layer electrode design and system and a thin-layer electrode in-situ imaging and spectroscopic characterization method for all-solid-state battery interface reaction. The objective of the invention is to expose a solid electrolyte-electrode interface reaction process which is difficult to observe in an effective detection range of various characterization technologies so as to realize real-time and in-situ visualization and accurate analysis of a dynamic evolution process of an internal interface of an all-solid-state battery.
Owner:INST OF CHEM CHINESE ACAD OF SCI

FY-4 seaborne cloud bottom height correction method considering buoy ceilometer

The invention provides a FY-4 offshore cloud bottom height correction method considering a buoy ceilometer, and belongs to the technical field of offshore cloud bottom height correction.According to the method, the cloud bottom height data of a buoy ceilometer and a FY-4 satellite are collected, sea surface reflection pollution correction is carried out on the satellite data, and a cloud layer structure is identified by using K-means clustering; extracting multi-scale fractal dimension features of buoy and satellite data and calculating a difference parameter, organizing correction data into a four-dimensional correction tensor, decomposing and extracting a low-rank structure by adopting CANDECOMP, and inputting a decomposition result and the fractal dimension difference parameter into a cloud base height bidirectional optimization model; dynamic balance between precision improvement and space-time stability maintenance is realized through a game mechanism of a precision optimization sub-model and a stability optimization sub-model in the model, and the technical problem that the marine cloud bottom height precision and the space-time stability of satellite inversion are difficult to consider at the same time is solved.
Owner:BEIHAI FORECASTING CENT OF STATE OCEANIC ADMINISTRATION ((QINGDAO MARINE FORECASTING STATION OF STATE OCEANIC ADMINISTRATION) (QINGDAO MARINE ENVIRONMENT MONITORING CENT OF STATE OCEANIC ADMINISTRATION))