490 results about "Incident wave" patented technology

The invention provides a blade lightning protection channel online test method and system based on a pulse current method, and belongs to the technical field of blade lightning protection detection.The method comprises the steps that a pulse waveform is generated through a pulse current generator to simulate lightning impulse, and the lightning impulse is injected into the surface of a lightning arrester of a blade lightning protection system; measuring channel currents at different positions of the surface of the lightning arrester in the length direction by using a distributed sensor; a high-voltage differential probe is used for collecting and measuring the waveform of an incident wave and the waveform of a reflected wave of an injection point; detecting blade surface potential distribution by using a capacitive coupling sensor; comparing the waveform of the incident wave, the waveform of the reflected wave and the theoretical waveform, determining a time domain reflection coefficient and a frequency domain impedance spectrum, and determining a fault type; after the fault type is determined, the fault point is positioned based on the channel current and the blade surface potential distribution, the lightning impulse is simulated through the pulse waveform, the lightning protection channel is further tested, shutdown is not needed, the testing efficiency of the blade lightning protection channel is effectively improved, and the power generation efficiency is ensured.

The invention provides an RCS prediction method based on deep learning, computer equipment and a readable storage medium. The method comprises the following steps: firstly, constructing an electromagnetic simulation model of a target, and resolving to obtain noise-free RCS sample data corresponding to different incident wave angles; and then simulation errors are introduced to form noise sample data. Then, constructing a convolutional auto-encoder network as an RCS denoising model, and training the RCS denoising model by using noise-containing and noise-free sample data; and then a deep neural network model is built based on a grey wolf algorithm to serve as an RCS prediction model, the trained denoising model is used for preprocessing the training data set, then the prediction model is trained, and finally prediction of a target RCS value is achieved. According to the method, the GWO-DNN deep learning model is constructed for prediction, so that the dependence on a physical mechanism and the manual parameter adjustment cost are reduced. Meanwhile, noise reduction preprocessing is carried out on the actually measured RCS result through CDAE, the too high influence of measurement errors on the prediction result is overcome, and the RCS prediction precision is improved.

The invention discloses a wind driven generator blade lightning conductor broken line point positioning method based on a radio frequency transformer, and relates to the field of wind driven generator blade lightning conductor broken line point positioning. A to-be-detected line is connected in series with the radio frequency transformer before being injected into traveling waves, and the change of traveling wave current is converted into the change of transformer output voltage; therefore, the output voltage of the radio frequency transformer is detected to judge the arrival time difference of the incident wave and the reflected wave, and then the breakpoint position is judged by multiplying the wave velocity by the time difference and dividing by 2. According to the wind driven generator blade lightning conductor breaking point positioning method based on the radio frequency transformer, the position of the lightning conductor breaking point can be efficiently, accurately, conveniently and flexibly detected at low cost, positioning measurement of disconnection of a multi-core wire part can be achieved, the specific positions of the breaking point and an abnormal point of the lightning conductor can be effectively determined, and the working efficiency is improved. After the positions of the broken line point and the abnormal point are determined, specific positions are repaired in a targeted manner, so that the cost for replacing the lightning conductor is saved.

The invention provides a multivariate numerical analysis method and system based on a TEHB test system, and the method comprises a multidirectional synchronous impact test numerical simulation step: building a rock numerical model with a real mineral structure and breakable mineral crystals, and constructing a single-axis bidirectional synchronous impact test simulation frame, the multi-directional synchronous impact test simulation module is used for implementing multi-directional synchronous impact test numerical simulation on the rock numerical model; a dynamic response index calculation step: separating and recombining the incident wave signal and the reflected wave signal obtained by monitoring, and obtaining a dynamic response index of the rock numerical model in the impact process; and a multi-element parameter intelligent analysis step: during numerical simulation of the multidirectional synchronous impact test, displaying spatial distribution characteristics of different types of cracks in real time, and realizing intelligent microscopic analysis of crack evolution, rock damage and energy characteristics. According to the invention, the dynamic mechanical behavior of the rock under the impact load can be simulated, and the real-time fracture information in the rock can be displayed more visually.

The present disclosure relates to direction of arrival (DOA) estimation systems and super-resolution DOA estimation devices. An example system comprises a diffraction modulator configured to modulate phase distribution of electromagnetic fields of incident waves emitted by N signal sources to focus the incident waves on a detector, the DOAs corresponding to the signal sources within a preset angle range. The detector comprises a plurality of detection areas, the preset angle range comprising a plurality of angle intervals, each detection area corresponding to one angle interval. The detector is configured to measure intensity of an electromagnetic field in each detection area in response to the incident waves being focused on the detector to obtain an intensity measurement value of the electromagnetic field in each detection area, and determine the DOAs corresponding to the N signal sources based on angle intervals corresponding to N detection areas with greatest intensity measurement values.

The invention relates to a multi-spectral wavefront aberration restoration method and system based on double roof prisms, and the method comprises the following steps: taking a sub-pupil image as the input of a classification model, obtaining classification feature data, and carrying out the data expansion of the classification feature data, the sub pupil image is obtained by inputting incident wavefront aberration into a simulation light path of the double-ridge prism wavefront sensor, the double-ridge prism wavefront sensor comprises two groups of double-ridge prisms, each group of double-ridge prisms comprises two ridge prisms which are vertically and oppositely arranged, the characteristics of the ridge prisms are equal, and the characteristics of the double-ridge prisms are equal. The two groups of double-roof prisms are made of a material combination for eliminating chromatic aberration; splicing the sub pupil images and the classification feature data after data expansion to serve as input of a regression model, and obtaining a Zernike coefficient matrix corresponding to incident wavefront aberration; and according to the Zernike coefficient matrix corresponding to the incident wavefront aberration and the Zernike polynomial, obtaining a recovered wavefront aberration. Compared with the prior art, the method has the advantage that the wavefront aberration recovery accuracy is improved.

The invention provides a spatial light modulator, a self-checking device thereof and a light computing device, and relates to the technical field of optical modulation.The spatial light modulator comprises an incident waveguide structure, a covering plate, a liquid crystal layer, a substrate and an emergent waveguide structure; the incident waveguide structure is optically coupled with the cover plate and is used for guiding externally incident laser into the cover plate at a preset angle; the covering plate is used for enabling laser to be propagated in the covering plate in a total reflection form; the substrate bears the liquid crystal layer, integrates the driving circuit and is used for applying regulation and control voltage to the liquid crystal layer; the liquid crystal layer is arranged on the lower side of the covering plate and used for conducting phase modulation on the laser transmitted to the liquid crystal layer in a total reflection mode in response to the regulation voltage. And the emergent waveguide structure is optically coupled with the covering plate and is used for guiding the laser modulated by the liquid crystal layer out of the covering plate to a free space. According to the spatial light modulator, efficient spatial modulation and accurate control of the light field are realized, so that the integration and function accuracy of the spatial light modulator in self-inspection and light calculation are improved.

The invention relates to a tide level obtaining method and system based on an OWC wave energy conversion device. The method comprises the following steps: constructing an energy loss prediction model in the air chamber; acquiring field incident wave energy, reflected wave energy, water potential energy increment, kinetic energy increment and pneumatic output energy at the current time period; inputting incident wave energy and reflected wave energy into the model to obtain predicted energy loss; and the tide level variation is solved based on the energy conservation relational expression, and the current tide level is calculated. The system comprises an energy loss prediction module, a wave energy acquisition module, a water body energy acquisition module, a pneumatic output acquisition module, an energy loss calculation module, a tide energy solving module and a tide level calculation module, which cooperatively realize the method. According to the scheme, an external tide gauge station is not needed, the local sea area tide level can be inversed in situ, at high frequency and with high precision, the method is suitable for an OWC-breakwater fusion scene, and cooperative operation of a port and ocean energy is supported.

The invention relates to a super-large L-shaped high-sea-condition high-precision absorption type wave maker system and a wave simulation method.The wave maker system comprises a central control layer, an equipment control layer and an execution mechanism layer which are sequentially connected, and the central control layer is characterized in that a main control computer operates wave making control software; a target wave time calendar curve is generated, theoretical motion instructions needing to be executed by the wave making plates are synchronously deduced, the main PLC conducts format conversion and time sequence synchronization processing on the theoretical motion instructions, and wave making plate displacement curve instructions are generated and issued; the equipment control layer is used for calculating active absorption compensation from the PLC and generating a motor motion instruction; the executing mechanism layer comprises a super-large L-shaped wave making unit, a fan-shaped driving arm, a plurality of motors and other assemblies to execute wave making motion and feed back wave height information, and the motors drive the fan-shaped driving arm to drive a wave making plate to swing around a hinge assembly and drive the wave making plate to execute compensation action opposite to the phase of incident waves; high-sea-condition wave simulation and high-precision wave active absorption are realized, and a full-wave-direction test with navigational speed is supported.

An antenna includes a supporting layer and a reflection element disposed on the supporting layer configured to reflect an incident wave with a respective reflection phase, the reflection element extending perpendicularly from the supporting layer at a height configured to achieve the respective reflection phase, and both the supporting layer and the reflection element being formed with an all-dielectric material. The antenna is not susceptible to metallic corrosion and has flexible design freedom. It is in a simple and compact structure for providing complete reflection and phase adjustment simultaneously. The simple structure of the antenna enables it to be manufactured in an efficient and cost-effective manner.

The invention belongs to the technical field of electromagnetic wave functional materials, and particularly relates to a nested split ring wave-absorbing metamaterial and a preparation method thereof. The wave-absorbing metamaterial sequentially comprises an FSS metal structure layer, a dielectric layer and a metal matrix layer from top to bottom in the thickness direction, the FSS metal structure layer is formed by distributing structure units in a periodic array mode, each structure unit is composed of a double-opening outer ring shaped like a Chinese character'hui 'and a double-opening inner ring, the double-opening outer ring is a split square, and the double-opening inner ring is a hollow square. The structural units are symmetrically arranged about the diagonal line of the dielectric layer. The FSS metal structure layer designed by the invention has anisotropy, so that the polarization direction of an incident wave can be rotated by 90 degrees in a reflection mode. By means of the design, the two functions of electromagnetic wave absorption and polarization conversion are achieved at the same time, and meanwhile the effect of multiband wave absorption is achieved. Within the frequency band of 4 GHz to 18 GHz, the maximum wave-absorbing strength of the nested wave-absorbing metamaterial is as high as-30 dB, and the effective wave-absorbing bandwidth can reach 7.5 GHz.

The invention relates to an incident wave loading method for simulating ground electromagnetic scattering based on FDTD. The incident wave loading method comprises the steps of solving an attenuation factor at a certain depth of a PML, arranging the side face and the bottom face of a connection boundary CB on the PML, establishing a ground electromagnetic scattering model, connecting the boundary to load an incident wave, and solving an electric field value and a magnetic field value of the loaded incident wave. According to the method, the four side faces and the bottom face of the connecting boundary CB are completely arranged on the PML, incident waves penetrate through the CB to enter the PML in a non-reflection mode, the edge effect generated by truncation of the periphery of the ground is effectively reduced, and the precision of ground electromagnetic scattering calculation is improved. The truncated ground is limited in a CB boundary area, and calculation of a reflection field and a transmission field is avoided. The method does not depend on ground parameters, and electromagnetic scattering calculation of rough ground and layered ground can be achieved.

The invention belongs to the technical field of antennas, and particularly relates to an ultrathin full-space metasurface unit with dual-band amplitude-phase regulation and control and a multi-beam generator. In order to solve the problems that component design cost is high, unit amplitude is low, and incident wave energy cannot be efficiently regulated and controlled, the full-space metasurface unit comprises a first metal layer and a second metal layer, the first metal layer is located above the second metal layer, a dielectric plate is arranged between the first metal layer and the second metal layer, and the dielectric plate is located between the first metal layer and the second metal layer. A first C-shaped groove and a double split ring resonator are etched on the first metal layer from outside to inside in a hollowed-out manner, a second C-shaped groove and an elliptical groove are etched on the second metal layer from outside to inside in a hollowed-out manner, and the opening directions of the first C-shaped groove and the second C-shaped groove are perpendicular to each other. And the multi-beam generator is designed based on the total space metasurface unit.

The invention relates to the technical field of breakwaters, and discloses a novel floating breakwater provided with tuned liquid mass dampers, which comprises a floating box, a fixing frame is mounted on the outer side of the floating box, a buoyancy plate is arranged at the lower end of the fixing frame, and assembling components are arranged on the left side and the right side of the fixing frame. Mooring assemblies are arranged on the front side and the rear side of the fixing frame, a sealing cover is connected to the upper end of the floating box in a screwed mode, two sets of partition plates are installed in an inner cavity of the floating box, damping chambers are formed between the partition plates and the floating box and between the two partition plates, and damping mechanisms are installed in inner cavities of the damping chambers. The floating breakwater is simple in structure and low in cost, the movement response amplitude of the floating breakwater under the action of waves can be remarkably reduced, the reflection effect on incident waves is improved, meanwhile, radiation waves generated by movement of the floating breakwater are reduced, and therefore the sea area behind the breakwater is better shielded.

The invention discloses an improved method for calculating grazing incidence sea surface back scattering through a small slope approximation method, and belongs to the technical field of sea surface electromagnetic scattering calculation, and the method comprises the following steps: S1, determining the wind speed of each stage of sea condition, and calculating the seawater dielectric constant; s2, generating sea surface geometry by using a linear filtering method based on a sea wave spectrum according to the determined wind speed; s3, introducing a conical incident wave; s4, introducing an edge geometric attenuation function; and S5, calculating sea surface back scattering by using an approximate integral formula of a small slope approximation method. According to the improved method for calculating grazing incidence sea surface back scattering through the small-slope approximation method, the edge geometric height is attenuated to 0 by applying the edge geometric attenuation function, so that the situation that the height fluctuation of the sea surface edge is close to an incident wave energy central axis is avoided, the problem that the calculation result is large under grazing incidence is solved, and the calculation efficiency is improved. And meanwhile, the calculation result is more accurate.

The invention belongs to the field of wave energy power generation, and discloses a pilot-frequency floater wave energy device array structure optimization method, which comprises the following steps of: giving an input wave energy spectrum frequency band reconstruction division strategy by combining the technical attributes of a wave energy device; based on an energy obtaining spectrum theory, deducing full-band equivalent energy capture of the device, and clarifying energy obtaining contribution of the device in the array in each band; the input sea wave spectrum is used as the target spectrum, array configuration design is carried out, the matching condition of floaters in the array is determined, the accurate matching of the output level of the array and resources is realized, and the development and utilization efficiency of the array is improved. According to the method, factors such as the mass, the resonance bandwidth, the inherent frequency and applied PTO damping of the floater are comprehensively considered, the relation of influence factors is established, pilot frequency floater wave energy devices meeting the requirements under specific sea area conditions are efficiently found in a simple and rapid means, an array composed of the pilot frequency floater wave energy devices can absorb incident wave energy in a full-band mode, and the wave energy efficiency is improved. And the utilization rate of the wave energy is greatly improved.

The invention relates to the technical field of electromagnetic scattering, in particular to an electromagnetic scattering characteristic prediction method and device, equipment and a storage medium. The invention discloses an electromagnetic scattering characteristic prediction method, and the method comprises the steps: carrying out the joint construction of a target structure parameter, a material electromagnetic parameter, and an incident wave parameter according to a preset mapping function, so as to obtain a joint output vector; performing simulation processing on the joint output vector according to a simulation method; training a preset incremental network model according to the simulation result and the simulation data set to obtain an updated main network model; acquiring real-time structure scene parameters, and predicting the real-time structure scene parameters according to the updated main network model to obtain electromagnetic scattering characteristics; comprehensive parameters are obtained, multi-source data are fused, a training data set is generated through simulation, an incremental network model is dynamically optimized, conventional recognition and new parameter adaptation are considered, the main network is updated, the electromagnetic scattering characteristics are predicted in real time, efficient support is provided for engineering such as radar detection, and the research and development quality and efficiency are improved.

The invention discloses a spectacle lens with a hexagonal cylindrical microstructure on the surface, and relates to the technical field of optical lenses, and the spectacle lens comprises a lens main body which is divided into a central optical area, a hexagonal cylindrical microstructure distribution area and a peripheral optical area from inside to outside in sequence by taking the geometric center of the lens main body as a circle point, the hexagonal cylindrical surface microstructure is arranged on the surface of the lens main body and comprises a plurality of regular girdle cylindrical surface microstructures and inverse girdle cylindrical surface microstructures which are concentrically arranged, the regular girdle cylindrical surface microstructures and the inverse girdle cylindrical surface microstructures are alternately arranged in the radial direction, and irregular astigmatism generates high-order disturbance on incident wave surfaces of human eyes. The method is mainly suitable for teenagers with fast myopia development, and low-order and high-order aberrations and myopia defocus can be alternately introduced into the peripheral retina view field, so that the effect of preventing and controlling the myopia of the teenagers is improved.

This invention provides a split Hopkinson bar device for achieving single-pulse loading, comprising an incident bar, a transmission bar, an incident wave-catching unit, and a stress wave generating unit. The incident wave-catching unit includes an incident wave-catching sleeve and an absorbing bar. One end of the absorbing bar is spaced apart from the incident bar flange, and the other end is connected to the absorbing bar flange. The incident wave-catching sleeve is fitted around the absorbing bar, with its two ends respectively fitting against the absorbing bar flange and the incident bar flange. The compressive stress wave generated by the stress wave generating unit is reflected by the incident bar flange to form a tensile stress wave. After loading the sample, a portion of the stress wave is reflected back as a compressive wave and absorbed by the incident wave-catching unit. This solves the problem of multiple reflections and interference in traditional Hopkinson bars, achieving pure single-pulse tensile loading. The device is compact, has high energy utilization, and is suitable for testing the dynamic mechanical properties of materials.

The invention relates to a line-to-circular polarization Huygens transmission array, which comprises a plurality of transmission array units arranged according to a square matrix form, each transmission array unit sequentially comprises a first metal layer, a dielectric substrate layer and a second metal layer from top to bottom, the first metal layer is located on the upper surface of the dielectric substrate layer, and the second metal layer is located on the lower surface of the dielectric substrate layer. The second metal layer is located on the lower surface of the dielectric substrate layer; the first metal layer comprises a C-like rectangular ring group arranged along the x direction and a C-like rectangular ring group arranged along the y direction; the second metal layer comprises a C-like rectangular ring group arranged along the x direction and a C-like rectangular ring group arranged along the y direction; the structures and sizes of the C-like rectangular ring groups placed in the x direction are the same, and the structures and sizes of the C-like rectangular ring groups placed in the y direction are the same. Compared with the prior art, the problem that an existing line-to-circular polarization transmission array antenna is low in aperture efficiency is solved, and the antenna has the function of focusing and converting a linear polarization spherical incident wave into a circular polarization plane transmission wave based on phase compensation.

The invention belongs to the technical field of wave attenuation prediction, and particularly relates to a method, a program and equipment for predicting the influence of uniformly distributed pile groups on random waves, and a storage medium. The method comprises the following steps: arranging a pile group in a target sea area, wherein the pile group is formed by uniformly arranging same vertical piles into a rectangular array, and acquiring random wave data propagated in the target sea area; establishing a coordinate system by taking a first vertical pile encountered during wave propagation as an original point, taking a wave propagation direction as an axis, taking a direction perpendicular to the wave propagation direction in a horizontal plane as an axis and taking a vertical direction as an axis; the peak period and the incident wave height of the wave when the wave is not influenced by the pile group are obtained, a pile group area is evenly divided into n sections in the axial direction from the original point, the end point of each section serves as a calculation node, the water depth of each calculation node is obtained, and the root-mean-square wave height of each calculation node is calculated; and summarizing the root-mean-square wave height calculation data of each calculation node, and drawing a root-mean-square wave height change diagram in the axial direction in the target sea area to obtain prediction of the influence of the uniformly distributed pile groups on the waves.

The invention discloses an ultra-wideband high-efficiency absorber in the technical fields of optics, material science and energy, which takes silicon dioxide (SiO2) as a substrate, and a titanium (Ti) nano rectangular body array is arranged above the substrate; a silicon nitride (Si3N4) regular hexagonal prism array is constructed on the top of the titanium layer, six cylindrical holes are etched in the midpoint of each vertex of a regular hexagon on the bottom surface of the titanium layer, and magnesium fluoride (MgF2) is filled in the cylindrical holes to form magnesium fluoride nano cylinders; a chromium (Cr) ring and a silicon nitride ring are sequentially superposed at the top end of the hexagonal prism and are tangentially matched with the hexagon on the top surface of the hexagonal prism. According to the UWB-HEA, the incident wavelength ranges from 400 nm to 4000 nm, the designed efficient absorption range (namely absorption band) of the UWB-HEA covers from near-infrared 855 nm to mid-infrared 3540 nm, about 2685 nm, the average absorption rate of 96.67% is achieved under TM waves, and the highest absorption rate is 99.66%; the average absorption rate of 96.44% is achieved under TE waves, the highest absorption rate is 99.72%, and the absorption rate is almost unrelated to polarization. In order to reduce radiation energy loss of an object, an ideal solar heat absorber needs to realize efficient light absorption in a wide wave band range.

The invention provides a three-dimensional frequency selector based on slow-wave loading slot lines, which comprises a plurality of slow-wave loading slot line units arranged periodically, and is characterized in that the slow-wave loading slot line units adjacent to each other along an x axis are separated by air layers to form periodic gaps in the x-axis direction; the adjacent slow wave loading slot line units along the y axis are directly connected; and the slow wave loading slot line unit comprises a slot line along the z-axis direction and a T-shaped metal patch loaded in a slot line gap. According to the invention, through x-y plane two-dimensional periodic arrangement and z-direction slot line gap extension, a three-dimensional structure is formed, and incident wave frequency selection is realized; after the T-shaped metal patch is loaded on the slot line, the equivalent electrical length is increased, and the phase velocity is reduced, so that the structure realizes the target space filtering characteristic under the condition of compact size.

The invention provides a composite material damage imaging method and system, and belongs to the technical field of material detection.The composite material damage imaging method comprises the steps that original signals are processed through a frequency domain analysis method, and environmental noise in the signal acquisition process is filtered out; establishing a full wave field data energy curve based on the original signal after the environmental noise in the signal acquisition process is filtered out, and analyzing the attenuation characteristic and the global distribution condition of wave field energy; compensating the original signal based on the attenuation characteristic, obtaining a compensation wave field based on the compensated original signal, and selecting a time window of damage imaging based on the global distribution condition of the energy of the compensation wave field; constructing a damage index based on a wave field gradient, and calculating a wave field damage matrix; and calculating a spatial distribution matrix of damage indexes by adopting an MS effective value based on a time window and a wave field damage matrix of damage imaging, and performing image fusion based on the spatial distribution matrix to create a final damage image. According to the method, the influence of strong incident wave components on damage identifiability is inhibited, and accurate identification of multiple damages is realized.

The invention discloses an optical chip structure, a manufacturing method and a wavelength division multiplexing system, and relates to the technical field of optical communication. The optical chip structure comprises an incident waveguide, a reflecting waveguide, a dielectric layer and a filtering layer; the incident waveguide and the reflecting waveguide are respectively connected with a first end of the dielectric layer, one ends, connected with the dielectric layer, of the incident waveguide and the reflecting waveguide are arranged at intervals, the width of the dielectric layer is larger than that of the incident waveguide and that of the reflecting waveguide, a second end, opposite to the first end, of the dielectric layer is plated with a filtering layer, and transition transmission of optical signals is realized through the dielectric layer. An optical signal does not need to be directly reflected to the reflecting waveguide at an outlet of the incident waveguide, the optical signal can be reflected at the filtering layer after being emitted from the incident waveguide and passing through the dielectric layer, and then is emitted to the reflecting waveguide through the dielectric layer, and the incident waveguide and the reflecting waveguide are arranged at an interval, so that the optical signal can be directly reflected to the reflecting waveguide. Therefore, signal crosstalk of an incident waveguide outlet and a reflecting waveguide inlet can be reduced.

The invention discloses a metal component internal stress ultrasonic detection method fusing a mechanism model, and relates to the technical field of ultrasonic stress detection, and the method comprises the following steps: S1, building a theoretical relationship between sound time difference and metal internal stress; s2, a wave propagation model; s3, ultrasonic signal acquisition: acquiring ultrasonic signals of incident waves and LCR waves, and circularly sampling the ultrasonic signals to obtain multiple groups of data; s4, analyzing a loading force signal: acquiring a loading force signal, and calculating a theoretical stress value at the measurement point by using the loading force signal; s5, signal screening and system stability analysis; s6, stress calculation; and S7, error analysis. According to the method, LCR waves which are good in stability, high in accuracy and sensitive to internal stress changes are obtained by establishing a mechanism model, a detection system is established on the basis of the LCR waves according to the acoustic elasticity principle, and metal internal stress detection based on the acoustic time difference is achieved.

The invention belongs to the technical field of electromagnetic wave regulation and control and anti-interference, and particularly provides a dual-polarization broadband angle selection surface structure for same-frequency anti-interference, which is used for solving the key technical problems of insufficient angle selectivity, limited working bandwidth, poor polarization adaptability and the like of the existing angle selection structure in engineering application. According to the invention, a structural design of multilayer metal and polystyrene foam based on Jerusalem cross gaps is proposed, and a TE and TM dual-polarization working mode is realized through an innovative unit design and an interlayer coupling mechanism; the multi-layer metal arrangement realizes excellent angle selectivity and more than 6% of working bandwidth while maintaining a low profile, can maintain low-loss transmission of incident waves under small-angle incidence, and can maintain stable angle selectivity and interference suppression performance under large-angle incidence; moreover, the antenna has the remarkable advantages of good angle selectivity, wide working bandwidth, high polarization adaptability, high structural stability and the like.

The invention discloses a urine detection method based on lensless microscopic lamination imaging, which comprises the following steps of: acquiring a low-resolution image of a urine sample by using a lensless microscopic lamination imaging device, calculating an incident wave vector to obtain a light field, and performing Fourier transform on the light field; smooth processing is carried out through Gaussian filtering, and image enhancement is carried out through Laplacian sharpening; using the low-resolution image to obtain a final large-view-field high-resolution image through iterative updating; adaptive threshold segmentation is carried out on the image, and then cells and a background are separated to obtain a segmented image; performing edge detection on the image by using a Canny operator to output the image; carrying out edge detection on each pixel point by using a non-maximum suppression method, and segmenting by using double thresholds; and performing cell counting on the image after edge detection, calculating the cell density, and finally outputting the identified and calculated information. The improvement of the method is expected to promote wide application of lensless microscopic lamination imaging in urine detection.

The invention discloses a method for measuring the thickness of glass by using a spectral confocal principle, which comprises the following steps of: constructing a spectral confocal thickness measurement model, and acquiring reflection wavelength data values corresponding to focal positions respectively formed on the upper surface and the lower surface of the glass; according to the one-to-one correspondence linear relation between the incident wavelength or the reflection wavelength and the focus positions, the reflection wavelength data values corresponding to the focus positions of the upper surface and the lower surface of the glass are converted into focus values respectively, the difference value between the two focus values is calculated, and the thickness value of the measured glass is determined; and transmitting the determined thickness value of the glass to a data output feedback system. According to the invention, the interference of manual measurement can be reduced, so that the precision of measuring the thickness of the glass can be improved, and the method has wide application prospect and value in the glass manufacturing and processing process.

The application provides a kind of ice constant temperature dynamic mechanical property testing device, belongs to ice detection technical field, including launch subassembly, impact lever, incident support, incident lever, sample support, transmission support, transmission lever, data acquisition module and data processing module, the end face of impact lever towards incident lever is equipped with several spaced convex structures, the end face of incident lever towards impact lever is equipped with shaping piece, shaping piece is used to extend the rising time of incident stress wave that incident lever transmits to ice sample, the end face of incident lever towards ice sample is equipped with wave modulation module, wave modulation module is used to realize the wave impedance continuous gradient matching of incident stress wave from incident lever to ice sample, data processing module corrects the data collected by data acquisition module to obtain final incident wave strain and final transmission wave strain, and calculates the strain rate, stress and strain of ice sample.The application scheme improves the accuracy of ice constant temperature dynamic mechanical property test results.