225 results about "Radiation properties" patented technology

Embodiments of the present invention provide a therapeutic device. The therapeutic device includes an inner layer including a plurality of sensing locations and a plurality of stimulating locations constructed therewithin. Furthermore, the therapeutic device includes a plurality of stimulation elements located within the plurality of stimulating locations. The therapeutic device further includes a plurality of optical fibers including a plurality of respective first optical endpoints and a plurality of respective second optical endpoints, the plurality of first optical endpoints located within the plurality of sensing locations. Furthermore, the therapeutic device includes an optical sensor configured to receive electromagnetic radiation from the plurality of second optical endpoints. The therapeutic device also includes a control module configured to determine radiation characteristics of the electromagnetic radiation received by the optical sensor and activate one or more of the plurality of stimulation elements in correlation with the determined radiation characteristics.

The invention relates to a coal field fire high-temperature area identification and judgment method. The coal field fire high-temperature area identification and judgment method comprises the following steps: S10, delimiting a target area of a coal field, and respectively acquiring various data in the target area; s20, establishing a time rule model of temperature change through thermal-time sequence coupling; s30, establishing an incidence relation between temperature and radiation characteristics through thermal-spectral coupling; s40, establishing a chemical reaction association relationship between temperature and gas release through heat-gas coupling; and S50, constructing a three-dimensional feature space through the integration of S20, S30 and S40, classifying the three-dimensional feature space through machine learning, and outputting the probability corresponding to the high-temperature type. The coal field fire high-temperature area identification and judgment method has the advantages that high-precision and strong-anti-interference high-temperature area identification is achieved, and reliable technical support is provided for coal field fire monitoring.

The invention provides an antenna assembly and electronic equipment. The electronic equipment comprises a middle frame, the middle frame comprises a frame and a middle plate, the frame surrounds the middle plate, and the frame comprises a first edge extending in the first direction, a second edge extending in the second direction and a bending area connected to the first edge and the second edge; the antenna assembly comprises a first antenna unit and a second antenna unit, the first antenna unit and the second antenna unit are arranged on the two sides of the bending area respectively, the first antenna unit is arranged on the first side, and the second antenna unit is arranged on the second side; the orthographic projection of the first antenna unit on the plane where the middle plate is located and the orthographic projection of the second antenna unit on the plane where the middle plate is located are not overlapped, so that the antenna assembly has better radiation characteristics, and the electronic equipment has better communication performance.

The invention relates to the technical field of array antennas, in particular to a sparse linear array beam forming method and system with unit rotation and mutual coupling considered. Array elements are obtained, Euler angle derivation is carried out on rotation of the array elements around the z axis, and a radiation electric field after rotation is obtained; setting a beam forming target according to the electric field of the radiation field; according to a beam forming target, optimizing the position, the rotation angle and the excitation phase of an array element by adopting a random optimization algorithm, and generating an initial beam scheme; an active directional diagram is extracted from the initial beam scheme according to full-wave simulation, the active directional diagram is combined with a CAL-SAPSO algorithm to optimize the array element position, the rotation angle and the excitation phase, and a final array element directional diagram is generated; according to the invention, by introducing array element rotation and considering a mutual coupling effect, efficient beamforming of the sparse wiring array is realized, the radiation characteristic of the antenna array can be adjusted more finely, the peak side lobe level and the cross polarization level are effectively reduced, and the overall performance of the system is improved.

The invention discloses a data-driven high-infrared-radiation-characteristic high-entropy rare earth tantalate material screening method and application, and belongs to the technical field of thermal barrier coating materials. The method aims at breaking through the infrared radiation performance bottleneck of a traditional rare earth tantalate ceramic material, a high-precision prediction model of the infrared emissivity of the rare earth tantalate is innovatively developed by constructing a multi-system common data set, and rapid evaluation of the infrared spectral characteristics of the A-site high-entropy rare earth tantalate RE3TaO7 material is achieved. On the basis of the model, a multi-element rare earth tantalate system which comprises (Y < 0.2 > Dy < 0.2 > Gd < 0.2 > Sm < 0.2 > Nd < 0.2 >) < 3 > TaO7 and (Nd < 0.2 > Eu < 0.2 > Dy < 0.2 > Er < 0.2 > Yb < 0.2 >) < 3 > TaO7 and has excellent infrared radiation characteristics is successfully screened out. According to the method, the limitation of traditional small sample material research is broken through through big data modeling, and an efficient theoretical design normal form is provided for developing a novel high-entropy infrared radiation material.

The invention relates to a non-Lambert surface emissivity inversion method, belongs to the technical field of infrared optical measurement and radiation modeling, solves the technical problems of low precision and poor model stability of non-Lambert surface emissivity inversion, and comprises the following steps: measuring original radiation intensity of a non-Lambert surface of a to-be-tested material in different emergent directions; converting the original radiation intensity into directional reflectivity; on the basis of the generalized Lorentz function, diffuse reflection background items are superposed, and a physical prior model is constructed; physical constraint is carried out on the physical prior model parameters; the parameter residual network generates a parameter field, and the parameter field is input into the optimized physical prior model; and carrying out hemispherical integration, and converting the directional reflectivity into directional-hemispherical emissivity. The device and the method are used for infrared thermal imaging measurement, material radiation characteristic characterization and engineering detection in a complex environment.

The invention relates to the technical field of jet flow flame disaster-causing parameter prediction, and discloses a jet flow diffusion flame size and radiation characteristic prediction method and system based on a machine learning method. The method comprises the following steps: constructing a flame size empirical model based on experimental data characteristics; constructing a machine learning model to predict flame height, width and lifting height, and combining the empirical model as a loss function with the empirical model; mass flow is determined according to the gas parameters, and a flame dwell time and radiation fraction calculation model is established in combination with a flame width prediction model; and establishing a flame total radiation power calculation model and a radiation source weighted distribution model, and solving the radiation heat flux by combining a flame height and lifting height prediction model. The prediction method provided by the invention can be used for predicting the sizes and radiation characteristics of jet diffusion flames with different scales under various working conditions, and has the characteristics of high prediction efficiency, high prediction precision, wide application range and the like.

The invention designs a short-wave over-the-horizon communication comprehensive simulation analysis method for the problems of cascade and comprehensive analysis of antenna radiation characteristics and radio wave propagation environments. The method comprises the steps of performing radiation characteristic simulation on a short-wave antenna, constructing an ionosphere model, simulating a propagation path of a short-wave signal in an ionosphere by adopting a ray tracing technology, integrating antenna characteristics, an ionosphere environment and a propagation mechanism, and calculating falling area energy distribution of the signal. And comprehensive evaluation and analysis of the reachable range of short-wave beyond-visual-range communication are realized. According to the method, the signal propagation path and fading characteristics of the signal from the radiation source to the receiving tail end can be comprehensively mastered, and guidance and basis are provided for antenna selection, erection, coverage area analysis and communication quality estimation in practical engineering application of short-wave beyond visual range communication.

The invention discloses a method for detecting radiation characteristics of a to-be-detected target in a shallow sea waveguide environment, which comprises the following steps of: 1, extracting real normal wave modal parameters of a sound source radiation signal in the shallow sea waveguide environment through an orthogonal constraint modal search method according to data received by a vertical array; 2, according to the real normal wave modal parameters, through a normal wave expression in a waveguide environment, performing inversion to obtain a sound field of the whole shallow sea waveguide; and step 3, acquiring sound field information required in the sound field of the shallow sea waveguide, mapping the sound source information into the free space by using the reciprocity theorem, realizing sound field migration from the shallow sea waveguide to the free space, and further acquiring the radiation characteristics of the target to be measured in the free space. The method is used for obtaining the radiation characteristics of the to-be-measured target in the free space according to the data received by the vertical array.

The invention discloses a method and system for testing electromagnetic radiation characteristics of an IGBT module for a converter valve, and the method comprises the steps: selecting an inductive load connection mode according to the position of an IGBT to be tested during testing: testing an upper IGBT, and connecting the two ends of an inductive load with a first wiring terminal and a second wiring terminal (the first wiring terminal is a neutral point between the upper IGBT and a lower IGBT) of the converter valve; and when the lower tube IGBT is tested, the first wiring terminal and the positive terminal of the bus capacitor are connected. A combined electromagnetic field probe is arranged around the IGBT to be detected, a probe shell is grounded, and a lead is connected with a signal conversion device. Firstly, a bus capacitor is charged to a stable voltage, and environmental background noise is collected by a probe when no gate pole is triggered. And pulse parameters are set by the upper computer and are sent to the driving board through the optical fiber to trigger the IGBT double-pulse action. Electric signals output by the probe are converted into optical signals through the photoelectric converter and transmitted to external equipment through the optical fiber to be restored. And subtracting background noise from a double-pulse measurement result, extracting a net radiation electromagnetic signal, and separating electromagnetic interference signals in different processes according to the switching time of the IGBT. The invention aims to accurately measure the radiation electromagnetic interference signal of the IGBT in the converter valve module in the switching-on, switching-off and diode follow current processes, and provides a basis for the electromagnetic compatibility design and shielding reinforcement of the converter valve module.

The invention discloses a power module near-field radiation characteristic simulation analysis method, and belongs to the technical field of electromagnetic compatibility. According to the method, aiming at the near-field radiation characteristic problem of the power supply module, a power supply module PCB full-wave three-dimensional numerical simulation model is built by using CST, and the near-field radiation characteristics of the power supply module PCB under different output end parameter configurations are obtained through simulation by changing the filter inductance and capacitance values of the output end of the power supply module. And the influence of different PCB grounding layer segmentation modes on the near-field radiation characteristics of the power supply module is analyzed, and a reference basis is provided for subsequent CAN node module PCB optimization.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The invention discloses an electromagnetic environment-friendly radiation protection assessment method and system, and the method comprises the steps: obtaining electromagnetic field data containing power frequency and high-frequency components through a data collection device, generating a multi-dimensional index data set and a radiation characteristic distribution diagram through the combination of exposure time and a crowd sensitivity index through a computational simulation method, and accurate quantitative analysis of the complex electromagnetic environment is realized. On the basis, a weight analysis method is adopted to fuse effect parameters to calculate a risk quantitative score, when the score exceeds a safety threshold value, radiation limit value data is automatically extracted to generate a visual risk map, and a processing module is linked to output a grading protection instruction. By activating protection configuration in the sensor network, decision unit parameters are dynamically adjusted according to real-time electromagnetic field data, and an optimized protection scheme including a dynamic strategy is formed. According to the invention, the conversion from passive protection to active early warning is realized, and the intelligent level and protection effect of electromagnetic radiation protection are significantly improved.

The invention provides an electronic device. The electronic device comprises an antenna, an electromagnetic energy detector and a controller. The electromagnetic energy detector is located near the radiator of the antenna. The controller can adjust the current distribution on the radiator through being coupled with the electromagnetic energy detector, so that the antenna still has good radiation characteristics in a state of being held by a user.

This invention provides a method for rapid planar near-field measurement of large-aperture antennas, relating to the field of antenna technology. The method obtains sparse field amplitude and phase information of several sampling surfaces in the near-field radiation region of the antenna under test through large-step uniform sampling. Simultaneously, it samples a finite number of precise field amplitude and phase information points for each sampling surface and obtains the field distribution characteristics by calculating the fluctuation of the amplitude at the sampling points. Based on the sparse field amplitude and phase information and field distribution characteristics of the sampling surfaces, it uses partitioned interpolation and field distribution calibration methods to obtain the initial electric field of each sampling surface. Based on planar wave spectrum theory, iterative numerical calculations are performed on the initial electric field to recover the near-field distribution of each sampling surface. Finally, the far-field radiation characteristics of the antenna are obtained through near-field-to-far-field transformation. This invention can significantly shorten the testing time while obtaining key indicators of the antenna's far-field characteristics, including the normalized radiation pattern main lobe and first sidelobe, 3dB beamwidth, sidelobe level, and axial ratio.

The invention discloses a method for designing and evaluating a spectral range of a surveying and mapping load wave band, which comprises the following steps of: firstly, transmitting configuration parameters based on radiation under an imaging condition; the entrance pupil radiation characteristic result, the load imaging performance, the image texture characteristic and the spectrum distortion characteristic of the detection wave band designed based on different spectral range parameters at the surveying and mapping load entrance pupil after atmospheric radiation transmission are calculated; and secondly, according to the obtained entrance pupil radiation characteristic result, the imaging performance parameter calculation result, the image texture characteristic parameter calculation result and the spectral distortion characteristic calculation result, evaluating the comprehensive influence of different spectral range parameters on load imaging. According to the invention, the imaging quality and the image information amount of the surveying and mapping load can be evaluated by different spectrum broadening, and the optimal configuration of the spectrum range of the load detection wave band is realized.

The embodiment of the application provides a geological exploration method and device based on the radiation characteristics of the intrinsic subatomic wave of a substance, which comprises the following steps: obtaining remote sensing satellite data by setting the specific range of a target mining area, a scale, a shooting angle, a time period and a wave band, and determining the original negative of the remote sensing satellite corresponding to the exploration area; performing radiation operation on the original negative according to a preset subatomic field generator, performing image enhancement processing on the target substance radiation image according to a nonlinear algorithm, and determining the corresponding target substance digital map; determining the corresponding three directions according to the digital map, determining the corresponding three digital images according to the three directions respectively, performing target substance inversion calculation and target substance model establishment operation according to the three digital images, and determining the corresponding target substance mathematical model to realize the visualization of the target substance. The application can capture the subatomic radiation of the crust mineral elements based on the satellite, detect and visualize the minerals by using the subatomic characteristics, and improve the efficiency and accuracy of geological exploration.

The application discloses a high-temperature and high-pressure combustion chamber spectrum characteristic transmission device based on a special optical fiber probe head, which comprises an optical fiber probe head, a light guide optical fiber, a light emitting characteristic analysis device and a cooling liquid pump; the optical fiber probe head comprises high-transmittance optical glass, a metal cooling sleeve and an optical flange; the high-transmittance optical glass can transmit ultraviolet-visible light with a wavelength of 100-760 nm; the metal cooling sleeve comprises a cylindrical sleeve and a connecting cap; the cylindrical sleeve is coaxially arranged on the outer periphery of the high-transmittance optical glass and is sealingly arranged in a probe head mounting hole; the light guide optical fiber can collect the ultraviolet-visible light transmitted through the high-transmittance optical glass and is connected with the light emitting characteristic analysis device; and the cylindrical sleeve and the connecting cap are both provided with cooling channels connected with the cooling liquid pump. The application can analyze the chemical reaction light emitting characteristics in the high-temperature and high-pressure combustion chamber in real time, is especially suitable for monitoring the spontaneous radiation characteristics of OH*, CH* and C2* groups generated in the combustion process, and thus can determine the reaction region and the reaction heat release.

To provide an antenna device capable of obtaining sufficient radiation characteristics even when arranged in a state of being close to a metal member, and a detection device.SOLUTION: The antenna device includes an annular substrate including a first surface, a second surface, and an opening penetrating between the first surface and the second surface, an annular antenna element provided on the first surface and surrounding the opening, a first feed line provided on the first surface and including a feed terminal connected to the antenna element, a second feed line provided on the second surface and including a connection terminal connected to a communication unit, the second feed line including an overlapping portion that overlaps a first portion of the first feed line in plan view, and a through hole that penetrates the substrate and connects the first feed line and the overlapping portion of the second feed line.SELECTED DRAWING: Figure 4

The invention provides a metal patch loaded miniaturized dielectric resonator antenna for a base station, and relates to the technical field of wireless communication, a specific parasitic metal patch is introduced at the bottom of a dielectric resonator, the limitation that the traditional design only depends on geometric dimension to adjust the frequency is broken through, the TM12 high-order mode frequency is obviously pulled down to be close to a fundamental mode TM10 and fusion is realized, and the antenna has the advantages of being simple in structure and convenient to use. On the premise that the size of the antenna is not increased, the working bandwidth is expanded to 3.4-4.0 GHz. Through the structural design, a cross-shaped groove structure is loaded in the central area of the dielectric resonator, a current path of a TM20 parasitic mode is cut off accurately, directional diagram distortion and cross polarization interference caused by the mode are effectively suppressed, and it is ensured that the antenna has stable radiation performance. Therefore, the antenna has excellent broadband and radiation characteristics, can still keep compact physical size, low profile structure and simple processing technology, and meets the urgent demand of a microwave frequency band wireless communication terminal on high performance and miniaturization antennas.

A system for detecting a liquid level for a household appliance includes a container for holding the liquid. At least one radiation source device and at least one detection device are provided. The container consists at least partially of a material which is at least partially transparent for the emitted radiation of the at least one radiation source device. In a first state the emitted radiation of the at least one radiation source device has a defined beam path through the container. A change in radiation properties of the emitted radiation can be detected by means of the at least one detection device.

The present invention discloses an orange-red inorganic pigment that combines high near-infrared reflectivity with selective infrared radiation. The pigment contains the elements Li, Mn, and Re, wherein the Re element is any one of Ti, Zr, or Hf. This invention avoids the use of toxic heavy metals, making it more environmentally friendly. Through the synergistic effect of Li, Mn, and Re, the pigment achieves high reflectivity, high emissivity, and ideal color. Compared to traditional single-component pigments, this combination exhibits superior optical properties.

The invention provides a novel radiation boundary structure for a multi-band antenna and the antenna. The novel radiation boundary structure comprises a metal reflection bottom plate, a first radiation layer and a second radiation layer, the PCB side wall is vertically arranged on the front surface of the metal reflection bottom plate; and a plurality of periodic pattern units made of conductive materials are formed on the surface of the PCB side wall and are used for regulating and controlling the radiation characteristics of the antenna radiation oscillator. According to the invention, the PCB-based side wall with the periodic conductive pattern is adopted, so that the lobe width of a directional diagram is effectively improved, and interference between oscillators of different frequency bands is reduced, thereby remarkably reducing directional diagram distortion caused by mutual coupling.

The application discloses a windmill type metasurface antenna with wideband stable radiation characteristics in the field of antennas, which comprises an upper dielectric substrate and a lower dielectric substrate arranged in a stack; a metal ground plate is arranged between the upper dielectric substrate and the lower dielectric substrate; the metal ground plate is provided with a coupling gap; a feed network for inputting energy to the coupling gap is arranged at the bottom of the lower dielectric substrate; a windmill type metasurface structure is arranged on one side of the upper dielectric substrate; the windmill type metasurface structure comprises a plurality of windmill type metal patches; sawtooth-shaped gaps are arranged between the windmill type metal patches, and the windmill type metal patches are arranged in a central symmetry; and the application realizes a novel windmill type metasurface structure by etching the sawtooth-shaped gaps, and has the characteristics of wideband, stable radiation characteristics, compact size and simple structure.

The invention discloses a cold background point target application-oriented infrared detector test evaluation method, which comprises the following steps of: according to radiation characteristics of an actual background and a target, camera parameters and infrared detector test system parameters, enabling a cold background and a cold background superposition point target to be equivalent to a surface source black body temperature tested by an infrared detector; and the performance of the infrared detector is tested and evaluated in the cold background infrared detector test cold cabin. The cold cabin is connected with the focal plane refrigeration and temperature measurement and control module, the black body refrigeration and temperature measurement and control module, the acquisition module and the vacuum pump, and can provide high-vacuum low-background test conditions for extremely low dark current and various photoelectric properties of the high-sensitivity infrared detector. The infrared detector performance parameters obtained by the method can provide test data support for actual performance evaluation of the cold background point target detection camera.

The invention provides an orbital parameter rapid design method and system capable of realizing intersection local time regular traversal, and the method comprises the steps: designing orbital parameters capable of realizing intersection local time regular traversal based on a satellite orbital motion theory according to local time traversal duration, an orbital height target interval and an eccentricity rate set value in combination with regression condition constraints; comprising the following steps: step 1, defining expected traversal time of intersection local time, an expected orbit height interval and eccentricity; 2, estimating an initial value of an inclination angle by taking a mid-value of an expected interval of the orbit height as an initial value and combining traversal time and eccentricity; 3, determining a regression period and the number of flying turns of the satellite around the ground in the regression period by combining regression conditions; and 4, carrying out iterative calculation by utilizing a nonlinear function solving algorithm to determine a final orbit height and a final inclination angle, and completing orbit parameter design. According to the invention, intersection point local time traversal within a specified duration can be realized, and a satellite can be ensured to periodically complete an observation task of acquiring radiation characteristics of different places on the same earth surface.

This invention belongs to the field of computational electromagnetics numerical simulation and provides a simulation method for electromagnetic scattering of thin-coated targets based on Schur complement preconditions. First, for the IBC scattering target to be solved, equivalent surface current and equivalent surface magnetic current are introduced as independent unknowns. The electromagnetic scattering solution equation is established using SDIE and then discretized. Next, the impedance matrix is ​​decomposed into near-field and far-field matrices using an octree structure. For the near-field matrix, key operator sub-blocks are explicitly assembled and extracted. Then, approximate operators in block diagonal form and Schur complement operators are constructed and approximately inverted. Simultaneously, the diagonal product of intermediate blocks is pre-calculated and stored based on the approximate operators. Finally, the constructed preconditions are applied to the GMRES iterative solver. When the iteration error reaches the preset convergence criterion, the current and magnetic current distributions on the target surface are output. Further calculations of radiation characteristic parameters such as the target's radar cross section are then performed, achieving low-cost, high-efficiency, and easily parallelizable electromagnetic simulation solutions.

The application relates to the field of remote sensing data processing, and provides a radiation true value region of interest extraction method and system, which comprises the following steps: S1, acquiring a reference data and an overlapping area of a to-be-inspected image, blocking the to-be-inspected image, and removing image blocks that do not meet the conditions; S2, calculating a variation coefficient of pixel brightness values in a radiation true value region of interest, and removing the radiation true value region of interest with a variation coefficient greater than a threshold value; S3, performing layered processing on the pixel brightness values in the radiation true value region of interest; S4, performing difference calculation on the average value of the pixel brightness values in the radiation true value region of interest and the reference pixel brightness values; and S5, extracting radiation true value regions of interest with different reflection brightness levels. The method combines the variation coefficient and uses the layered sampling method in the extraction of the planar radiation true value region of interest, and the extracted radiation true value region of interest is mainly distributed in an area with flat terrain, uniform ground object types and high radiation characteristic consistency, so that the planar true value is more accurate and more representative.

Systems and methods for illuminating a plurality of plants (11) are disclosed. The system (1) comprises an illumination system (3) configured to illuminate a plurality of plants (11) with radiation having one or more controllable radiation properties, and a data processing system (100) communicatively connected to the illumination system (3). A data processing system (100) comprises an input interface for receiving a signal indicative of a status of a plant canopy, an output interface for sending a control signal to an illumination system, and a processor. The processor is configured to: receive a signal indicative of a status of a plant canopy formed by a plurality of plants (11); determining whether the plant canopy is closed based on the received signal indicative of the status of the plant canopy; and sending a control signal to the illumination system (3), the control signal being based on the determined canopy closure. The illumination system (3) is configured to switch from illuminating the plurality of plants (11) according to a first radiation recipe to illuminating the plurality of plants (11) according to a second radiation recipe different from the first radiation recipe based on the received control signal.

An antenna structure disposed in a case includes a blocking part, a cooling module, an antenna module, and a ground component. The cooling module is disposed on a side of the blocking part. The antenna module is disposed on the side of the blocking part and has an interval space between the antenna module and the cooling module along a first direction. The ground component is disposed in the interval space, and is electrically connected to the antenna module and the cooling module. The ground component, the antenna module and the cooling module jointly define a slot in the interval space. The antenna module has a resonant frequency, and the antenna module couples and excites the slot to generate another resonant frequency. Thus, the antenna structure of the present disclosure can provide multiple frequency bands and great radiation characteristics in an environment with multiple metals.