162 results about "Irradiance" patented technology

The invention discloses a solar irradiance prediction system and method based on dual attention multi-modal fusion. The method comprises the following steps: performing spatial feature extraction on a sky imaging observation map after preprocessing and time synchronization by using a MobileNetV2 network to obtain a sky imaging time sequence feature sequence; inputting the sky imaging time sequence feature sequence into a DAT model to obtain a global sky imaging time sequence feature sequence, a local sky imaging time sequence feature sequence and a local convolution position coding residual term; obtaining an aggregated sky imaging time sequence feature sequence according to the global sky imaging time sequence feature sequence, the local sky imaging time sequence feature sequence and the local convolution position coding residual item; performing time-dependent modeling on the meteorological observation data by adopting a long short-term memory network to obtain a meteorological observation data feature sequence; and performing feature fusion on the aggregated sky imaging time sequence feature sequence and the meteorological observation data feature sequence through a trans-attention mechanism to obtain a fused joint feature sequence for solar irradiance prediction.

The invention belongs to the technical field of photovoltaic power generation, and particularly relates to a floating type photovoltaic array power generation performance evaluation method, which comprises the steps of constructing an offshore area environment model; a Boussinesq model is adopted to calculate a real near-shore wave field; constructing a matching surface on the outer side of the array, extracting wave field time domain information, and converting the wave field time domain information into a frequency domain component; solving the six-degree-of-freedom motion response of the array through a boundary element method by taking the component as a boundary condition; calculating the dynamic attitude of the assembly, the solar incident angle, the out-of-plane irradiance, the working temperature and the instantaneous output power in real time based on the motion response; and finally evaluating the wave-induced power generation loss. According to the method, the Boussinesq model and the boundary element method are coupled in a domain nested mode, balance is achieved between calculation efficiency and precision, key environmental factors such as non-constant water depth, topographic relief and shoreline effect are synchronously considered, 'hydrodynamic force-light receiving-power generation 'chain coupling is achieved for the first time, and reliable support is provided for engineering design and performance evaluation of a near-shore floating type photovoltaic array.

A lighting device, a controller for the lighting device, and a method for using the lighting are disclosed. The lighting device comprises one or more light sources. The lighting device is configured to operate in a predefined first operation mode wherein the lighting device is configured to emit greenish white light. The greenish white light is white light as defined by ANSI C78.377-2017. The greenish white light has a relative M-cone-opic irradiance of at least 0.393, wherein the relative M-cone-opic irradiance is defined as a ratio between an M-cone-opic irradiance and a sum of an L-cone-opic irradiance, the M-cone-opic irradiance, and an S-cone-opic irradiance as defined in publication CIE S 026 / E:2018.

The invention discloses a radiation correction method and system for an airborne hyperspectral imager. The radiation correction method and system are used for improving the radiation correction precision in complex weather. The method comprises the following steps: calculating a theoretical sun position based on unmanned aerial vehicle initial coordinates, ephemeris data and atmospheric parameters; performing course and differential compensation on a solar azimuth angle by combining IMU course and wind speed and direction data, performing refraction correction on an elevation angle, and outputting a high-precision sun position parameter; hyperspectral images and irradiance data are synchronously acquired, quaternion interpolation is combined with IMU data to realize space-time alignment, and attitude disturbance is eliminated; a hemispherical space irradiance model is constructed based on alignment data, cloud layer modes (clear sky, thin cloud and thick cloud) are divided according to atmospheric optical thickness variance, and Lambert body proportion correction, a discrete longitudinal standard method or a deep convolutional spectral network are respectively adopted for radiation correction. The method remarkably improves the correction precision and generalization ability, supports large-area image splicing, and is suitable for quantitative application of geological exploration, environment monitoring and the like.

The invention relates to the technical field of irradiance estimation, in particular to an irradiance estimation method and device, electronic equipment and a storage medium, and the method comprises the following steps: obtaining ground site historical data of a research region, reanalysis data of the research region and an aerosol public data set; dividing weather types into clear sky samples and cloudy sky samples according to the obtained historical ground station data of the research area; inputting the clear sky sample, the reanalysis data and the aerosol public data set into a solar irradiance model to calculate clear sky expected irradiance GHIcs; obtaining observation data of a geostationary orbit meteorological satellite, and estimating a cloud cover coefficient CI by using satellite reflectivity; inputting the multi-cloud sky sample and the cloud cover coefficient CI into a cloud index-based semi-empirical model, and calculating a clear sky coefficient Kc; and multiplying the clear sky expected irradiance GHIcs by the clear sky coefficient Kc to obtain an irradiance estimation value under the all-sky condition. Through the improvement of the method, the regional adaptability and the estimation accuracy of irradiance estimation are improved.

The invention discloses a day-ahead solar irradiance data correction method, and the method comprises the steps: screening historical numerical weather forecast data of the same weather type based on the weather type of day-ahead weather forecast; calculating a Spearman correlation coefficient and a variance of daily solar irradiance, dividing historical days into different clustering groups through a Kmeans clustering algorithm, and obtaining a clustering center; determining a cluster group to which the day-ahead numerical forecast belongs, and selecting historical data with matched weather types and groups to construct a training set; training a COSTLSTM model capable of decomposing an input sequence trend and a seasonal component to obtain a correction model; and inputting the numerical weather data of the day-ahead weather forecast into the trained solar irradiance correction model, and outputting to obtain the corrected day-ahead solar irradiance. Compared with the prior art, the method can effectively cope with complex mixed modes and seasonal periodic differences in the solar irradiance, and realizes accurate data correction of the day-ahead solar irradiance in complex weather.

A hybrid twin process uses an independent mechanical destructive process and an illumination process to change of state of weed seeds to having reduced germination viability by illuminating a seed with at least one of 2 J / cm2 cumulative illumination energy, and 0.2 W / cm2 irradiance, but no more than 7 W / cm2 average irradiance, of at least one of an Indigo Region Illumination Distribution (IRID), and infrared radiation that is substantially Medium Wavelength Infrared (MWIR) radiation, preferably 2-8 microns. The process can be incorporated into a harvester combine to convert a tailings flow prior to discharge on an agricultural field. For the mechanical destructive process, high required applied energy, noise, wear, and difficulty treating impact-resistant seeds are avoided by modifying a driven load flow via increased capability of exposure to illumination and underdriving the mechanical destructive process. This can include randomization, rarefaction and enhanced circulation.

The present disclosure relates to a computer-implemented method (200) of training a predictive model (10) for short-term forecasting of a Global Horizontal Irradiance, GHI, value at a reference location (21), the method (200) comprising: i) obtaining (201) a satellite image (S1-Sn) of cloud coverage over a ground area comprising said reference location (21); ii) performing (202) image processing of said satellite image (S1-Sn) to obtain a corresponding image of the cloud thickness over said ground area; iii) generating (203) a sun path image (P) by composing said image of the cloud thickness with a solar vector defining a path between said reference location (21) and a sun position at an acquisition time of said satellite image (S1-Sn), wherein said sun path image (P) is representative of a cloud occlusion of the sun along said solar vector; iv) providing (204) said image of the cloud thickness to a first feature extraction pipeline of said predictive model (10) to provide a first set of extracted features; v) providing (205) said sun path image (P) to a second feature extraction pipeline of said predictive model (10) to provide a second set of extracted features; vi) combining (206) said first set of extracted features with the second set of extracted features to generate a concatenated set of extracted features; and vii) inputting (207) said concatenated set of extracted features into a classification layer of the predictive model (10) for training on a relationship between said satellite image (S1-Sn) and said GHI value.

The invention discloses a short-term earth surface solar irradiance prediction method and system in the technical field of solar energy resource prediction and artificial intelligence crossing. The method comprises the following steps: acquiring advanced calibration instant extraterrestrial horizontal plane solar irradiance auxiliary data according to a longitude and latitude list of a target area and set advanced time; constructing image modal input data according to satellite image data of a target area and the advanced calibration instantaneous extraterrestrial horizontal plane solar irradiance auxiliary data; and according to historical earth surface irradiance time sequence data and the image modal input data, performing prediction by using the trained multi-modal fusion network to obtain a short-term earth surface solar irradiance prediction result. According to the invention, by introducing advanced calibration of instantaneous extraterrestrial horizontal plane solar irradiance auxiliary data and a multi-mode deep fusion technology, the precision and robustness of short-term solar irradiance prediction are effectively improved, and the method is suitable for photovoltaic power generation power prediction and power grid dispatching.

The invention belongs to the technical field of quantitative remote sensing, and relates to a mid-infrared hyperspectral emission and reflection characteristic integrated inversion method, which comprises the following steps: acquiring mid-infrared hyperspectral satellite remote sensing data, and optimizing sensing entrance pupil radiance data to obtain optimized entrance pupil radiance data; the intermediate infrared hyperspectral satellite remote sensing data comprises sensing entrance pupil radiance data; performing atmospheric correction on the optimized entrance pupil radiance data by using a radiation transfer model to obtain surface brightness temperature and atmospheric downward radiation, and calculating solar irradiance reaching the surface; constructing a mid-infrared hyperspectral earth surface bi-directional reflectivity inversion framework, and performing earth surface bi-directional reflectivity inversion based on the mid-infrared hyperspectral earth surface bi-directional reflectivity inversion framework to obtain earth surface bi-directional reflectivity and earth surface equivalent radiance; constructing a scene self-adaptive framework, and performing inversion based on the scene self-adaptive framework to obtain the surface temperature and the surface emissivity; therefore, accurate separation of surface emission radiation and surface reflection radiation is completed.

The application provides a curved surface optical element surface defect scattering detection method and system, which comprises the following steps: setting a pre-focusing incident light beam in a detection light path, so that the incident light beam forms a virtual object point behind the curved surface optical element; adjusting the distance from the virtual object point to the vertex of the curved surface to satisfy a conjugate relationship with the distance from the detector to the vertex of the curved surface; discretizing the illuminated local curved surface region into an array of micro surface elements; calculating the projection of the unit vector of the scattered light and the unit vector of the incident light on the local tangent plane of each micro surface element to establish a local spatial frequency mapping relationship; performing surface-detector geometric modeling, micro surface BRDF calculation, radiation transmission and irradiance calculation of the scattered light field, constructing a curved surface scattering physical model and reconstructing the irradiance distribution on the detector target surface; performing total integral scattering processing on the irradiance distribution to identify defects, extracting the power spectral density of the defect region to obtain five frequency domain characteristic values, and inputting the five frequency domain characteristic values into a machine learning classifier for defect classification.

The invention discloses a photovoltaic power station irradiance component calculation method and device. According to the method, environmental parameters and multiple groups of historical operation data of a photovoltaic power station are obtained firstly, and then target historical operation data with corresponding slope clear sky irradiance and power actual value correlation meeting preset conditions are screened out according to the environmental parameters and the multiple groups of historical operation data. And finally, exhaustion of a light conversion efficiency prediction value is carried out based on the target power actual value and the target direct light conversion efficiency and the target scattered light conversion efficiency corresponding to the target timestamp, and when the residual error between the prediction power corresponding to the prediction value and the target power actual value is minimum, the target power actual value is obtained. And determining a clear sky irradiation direct component predicted value and a clear sky irradiation scattering component predicted value corresponding to the predicted light conversion efficiency as a clear sky irradiation direct component actual value and a clear sky irradiation scattering component actual value of the target timestamp. The difference between the conversion efficiency of the direct light and the conversion efficiency of the scattered light is fully considered, and the accuracy of irradiance component calculation is effectively improved.

1. The name of the design product: irradiance immersion factor measuring instrument. 2. The use of the design product: measuring the immersion factor of irradiance meter in water. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to the technical field of solar simulation adjustment, and discloses an intelligent controllable method and system for simulating dynamic change of solar radiation. Long-term irradiation data are obtained from a database and a local weather station and fused, the discontinuity of the daily boundary is overcome by applying a circumferential mapping and clustering method, and the maximum daily radiation intensity, the typical sunrise moment and the sunset moment of each month are obtained; on the basis, constructing an attenuation model taking a monthly typical value as a benchmark, introducing random disturbance and physical constraints conforming to meteorological statistical characteristics, generating intra-month daily simulation parameters, further utilizing a trigonometric function improvement model to dynamically represent the daily simulation parameters of the current month as target irradiation intensities at all moments, standardizing the target irradiation intensities and mapping the target irradiation intensities into command control quantities, and calculating the target irradiation intensities. Precise reproduction of the natural solar radiation curve by the illumination intensity is realized; then actual light intensity is detected through an irradiation sensor, execution errors are calculated, control action quantity is generated in real time through a PID control law, and finally execution quality is evaluated through a control action quantity sequence.

The invention relates to an infrared image simulation method based on irradiance mapping, belongs to the technical field of infrared image simulation, and solves the technical problem that simulation images cannot be directly obtained due to the influence of random noise existing in infrared image simulation. Converting the quadrilateral mesh into a triangular mesh and encrypting the triangular mesh to obtain a computational mesh; the shielding relation and the radiation transfer relation between the grid surface sources are judged, and a radiation transfer matrix of the grid surface sources is obtained; calculating the irradiance cache of the grid surface source by adopting a progressive irradiance calculation method, and obtaining the irradiance distribution of the surface of the scene object; and constructing a ray matrix, performing irradiance mapping to obtain a radiance matrix, converting the radiance matrix into a grayscale image, and obtaining an infrared simulation image of the scene. The method is used for object surface infrared radiation simulation.

The invention provides an under-forest light spot space-time distribution simulation method and system based on anisotropic probability volume fraction, and the method comprises the steps: obtaining laser radar point cloud data of a target forest stand, and carrying out the preprocessing, and generating a standardized point cloud; constructing a forest probability density field: dividing a forest stand space into voxel grids, and for each non-empty voxel containing vegetation, extracting spatial distribution statistical characteristics of internal point clouds of the non-empty voxel and calculating an anisotropic extinction coefficient of each non-empty voxel; the method comprises the following steps: simulating the sun as a surface light source with a preset angular diameter, emitting light from an under-forest preset observation point to the surface light source, executing probability volume fraction light stepping in a forest probability density field, and obtaining the optical thickness by accumulating anisotropic extinction coefficients of all non-empty voxels on a light propagation path. And then calculating the transmittance of the light reaching the observation point, integrating the solar spectrum irradiance in a wave band and a time period corresponding to the photosynthetically active radiation, and generating a spatial-temporal distribution map of the photosynthetically active radiation under the forest.

The application provides a multi-objective dynamic optimization method and system for a solar seawater desalination process, belonging to the technical field of solar seawater desalination control. Firstly, the application collects solution conductivity data at the inlet and outlet positions and irradiance trend data above the photovoltaic array. Then, the conductivity difference is calculated to generate gradient data to map the desalination demand vector, and the cloud motion vector is extracted from the irradiance data using the optical flow method to construct the energy supply potential vector. Subsequently, the two are aligned and convolved to generate a state space matrix, which is input into the constructed Kalman filter to predict the target voltage reference trajectory. Finally, the trajectory is substituted into the multi-objective constraint function to calculate the target duty cycle command, and the DC converter switching state is adjusted to change the operating voltage of the desalination device. The application can achieve real-time multi-objective dynamic optimization of the water production efficiency and equipment safety of the solar seawater desalination system under the dual fluctuations of light and salinity.

An electro-optical device (1) comprising a radiation unit (10) adapted to emit a radiation beam (11) having a peak emission wavelength in a range of 280-320 nm, a detection unit (20) adapted to detect a distance to a user and generate a detection signal based on the detection, and a radiation control unit (30) adapted to receive the detection signal and generate a control signal in response. The electro-optical device (1) is adapted to provide an irradiance in the range 0.003-0.5 mW / cm2 to the user.

The invention belongs to the technical field of optical lenses, and particularly relates to a discrete point source bus set envelope fitting and optimization design method for expanding a light source to realize uniform illumination. Dispersing the expansion source into point light sources, and obtaining a cluster bus set based on an accurate mathematical model of the point light sources; according to an envelope principle, selecting an outmost contour including all features as much as possible, and fitting the outmost contour by using a polynomial under a polar coordinate system to serve as an initial generatrix of the light distribution lens; a root mean square error of an irradiance distribution numerical value obtained by running a two-dimensional ray tracing program is used as an evaluation index to optimize and fit various coefficients of a polynomial, finally, the lens suitable for achieving uniform illumination through extended source light distribution is obtained, and the problem that mathematical modeling of an extended source light distribution light path is difficult is solved; through verification, the performance is good, the irradiation uniformity is gradually improved to 92.7% from 76.8% of an initial structure, the edge irradiance gradient is improved to 0.45 from the initial 0.27, and the edge dispersion problem is effectively weakened.

The present application belongs to the technical field of photovoltaic power generation, and particularly relates to a floating photovoltaic array power generation performance evaluation method, comprising: constructing a near-shore sea area environment model; calculating a real near-shore wave field by using a Boussinesq model; constructing a matching surface on the outside of the array and extracting wave field time domain information, and converting the wave field time domain information into frequency domain components; taking the components as boundary conditions, and solving the six-degree-of-freedom motion response of the array by using a boundary element method; calculating the dynamic posture of the components, the solar incident angle, the out-of-plane irradiance, the working temperature and the instantaneous output power in real time based on the motion response; and finally evaluating the wave-induced power generation loss. The present application balances between the calculation efficiency and the accuracy by coupling the Boussinesq model and the boundary element method in a sub-domain nesting manner, simultaneously considers key environmental factors such as non-constant water depth, terrain undulation, shoreline effect and the like, and first realizes the chain coupling of "hydrodynamic force-light receiving-power generation", thereby providing reliable support for the engineering design and performance evaluation of the near-shore floating photovoltaic array.

1. The name of the design product: irradiation meter. 2. The use of the design product: for detecting the intensity of irradiation. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The application discloses a kind of floating offshore solar radiation measurement data correction method and system, it includes the following steps: obtaining the pitch angle and roll angle of floating offshore solar radiation measurement system;Obtain the unit normal vector of the measuring plane pointing to the sky in the horizontal plane rectangular coordinate system;Calculate the angle between the measuring plane and the horizontal plane;Get horizontal plane solar zenith angle and azimuth angle;Construct the unit vector along the direction of sunlight incidence pointing to the sun;Correct the zenith angle;Calculate the horizontal plane scattered irradiance value;The horizontal plane total irradiance saved by floating offshore solar radiation measurement system is corrected, and the corrected horizontal plane total irradiance is obtained.The measurement data of the floating offshore solar radiation measurement system is corrected by the application, the measurement error caused by the inclination of the measurement platform caused by wind and wave is reduced, and more accurate measurement data is provided for the evaluation of offshore light resources and the planning of offshore photovoltaic power station.

An example Fresnel lens design has four segments A-D of equal area which can be manufactured from the same mold, before being rotated and assembled in the pattern shown. The segments A-D have flanges, appropriate to facilitate assembly and structural integrity during the lifetime of the lens.

The present invention concerns a method for determining the solar distribution in an area, the including, a phase for collecting data to form a training database, a phase for training a model on the basis of the training database to obtain a trained model, the input of the trained model being an image of an area seen from the sky and the output being a global cartography of the irradiance projected on each surface of the area imaged on the input image, and a phase for operating the trained model. The phase for operating the trained models includes, a step of receiving an image of an area seen from the sky, and a step of determining by the trained model a global cartography of the irradiance projected on each surface of the area imaged on the received image.

The application relates to a kind of super-short-term irradiance measurement methods based on feature mining and Seq2Seq model, the method comprises the following steps: through the abnormal data cleaning rule, the abnormal data of night or continuous zero irradiance is excluded, the difference feature is generated using multivariate scale self-adaptive difference construction method, and the solar elevation angle time sequence feature is reconstructed in combination with space-time dynamics, the negative value is retained to enhance the difference of adjacent date; the local nonlinear relationship of solar elevation angle and meteorological variable is extracted using learnable convolution kernel, and the feature is fused and spliced through full connection layer; a CDAtt-LSTM hybrid model is constructed, based on Seq2Seq architecture, a double-layer LSTM is used to process historical data in the encoder, the encoder and decoder historical state are fused through the cross-stage dynamic attention mechanism in the decoder, and a stage weight function is introduced. The application significantly improves the accuracy and stability of irradiance prediction through the dynamic coupling of physical characteristics and deep learning.

Disclosed herein is a lighting optical system comprising: a light source having a plurality of light-emitting elements configured to emit light from light-emitting surfaces, respectively; a relay optical system configured to convert a luminous intensity distribution of light emitted from each of the light-emitting elements into an irradiance distribution and to superimpose a plurality of the irradiance distributions corresponding to the plurality of light-emitting elements on each other on a superimposed surface; an optical integrator having a plurality of wavefront splitting elements arranged in parallel to each other, the plurality of wavefront splitting elements being configured to wavefront split irradiated light through the relay optical system and to transmit the wavefront split light as a plurality of pencils of light rays; and a condenser optical system configured to superimpose the plurality of pencils of light rays on each other on a surface to be irradiated.

The invention discloses an aerodynamic radiation transfer calculation method based on equivalent Lambert body surface element tracing, and the method comprises the steps: simplifying a conventional radiation transfer equation into a form based on the Kirchhoff's law based on the optically thin and non-scattering characteristics of a hypersonic velocity external flow field; the brightness spectrum of the equivalent Lambert area light source is obtained by integrating the emission coefficient along the observation sight line; then, enabling the transmission process of aerodynamic radiation of an aircraft external flow field to the star sensor to be equivalent to a Lambert surface radiation source located at the top end of a light shield, discretizing a light source surface and a detector image surface into infinitesimal elements, and performing tracing calculation on irradiance contributions generated by all the light source surface infinitesimal elements to a single detector image element; finally, the irradiance distribution of the pneumatic radiation on the star sensor detector is efficiently and accurately obtained; according to the method, the transmission process of aircraft flow field pneumatic radiation to the star sensor is reasonably simplified, the calculation efficiency of pneumatic radiation transmission is remarkably improved, and the method is suitable for engineering prediction and evaluation.

The invention relates to a method for controlling illumination of a surface of an object by means of a viewing device (10), the viewing device (10) comprising:-a display (17) comprising several sub-regions configured to be in a first state in which the sub-regions transmit light in a first direction and a second state in which the sub-regions do not transmit light in the first direction; the method comprises:-obtaining a value of the radiation flux received by each sub-region,-converting said value into an irradiance value,-selecting an average irradiance value based on the converted irradiance value and a predetermined value to obtain a target average irradiance value, and-determining a control rule such that, during a predefined duration, the target average irradiance value is controlled to obtain the target average irradiance value. The total duration during which each sub-region is in the second state depends on the ratio of the target average irradiance value to the obtained value.

The invention discloses a suspended water body apparent spectrum multi-probe synchronous observation system based on an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles, and the system comprises a water body radiance probe which is used for measuring a water surface spectrum radiation signal; the downlink irradiance probe is used for measuring the spectral irradiance incident to the water surface; the first micro-motion mechanism is connected to the water body radiance probe and is used for driving a receiving view field of the water body radiance probe to perform first periodic motion according to a preset track based on a received first control instruction; the data processing unit is used for taking the first control instruction as a first reference input signal, performing signal analysis on the synchronously acquired water surface spectral radiation signal, and separating a spectral signal component modulated by the first periodic motion; and reconstructing spatial distribution information of the apparent optical characteristics of the water body in the measurement area based on the first field-of-view center direction and the spectral signal component at each sampling moment.

This invention discloses an adaptive adjustment method for observing solar irradiance within ice, which measures the initial thickness of the high scattering layer and sea ice layer; sets 5 observation layers within the high scattering layer, and uniformly sets 10 observation layers vertically within the sea ice layer and subglacial water; sets the corresponding observation layer adjustment period to N days, and measures the irradiance spectral intensity set {F} within the t-th observation layer adjustment period. t}; Based on the irradiance spectral intensity set {F t The invention updates the position of the first observation layer within the high-scattering layer and calculates the new thickness of the high-scattering layer. Based on the calculated new thickness, the first observation layer is reset, and then the process awaits the next observation layer adjustment cycle. This invention can track the changes in the thickness of the high-scattering layer caused by seasonal sea ice variations in real time, dynamically adjust the position of the observation layer within the high-scattering layer, and ensure sufficient measurement data within the high-scattering layer, thereby accurately obtaining the optical parameters of each layer within the ice. This provides strong technical support for researchers to conduct long-term in-situ observations of the polar environment.