841results about "Photometry" patented technology

The invention relates to the technical field of laser measurement, in particular to a laser spot energy distribution measurement method, device and equipment and a storage medium, and the method comprises the steps: firstly obtaining a to-be-simulated laser beam, calling a pre-trained laser light path transmission model to carry out the beam propagation behavior simulation of the to-be-simulated laser beam, and obtaining a simulation spot energy distribution parameter; constructing an initial light beam energy distribution model based on the simulation light spot energy distribution parameters, then optimizing model parameters of the initial light beam energy distribution model by adopting a beetle beetle algorithm to obtain a target light beam energy distribution model, and then obtaining real-time laser light spot energy parameters; inputting the real-time laser spot energy parameters into the target light beam energy distribution model for fitting calculation to obtain real-time spot energy distribution parameters, and finally performing visualization processing on the simulation spot energy distribution parameters and the real-time spot energy distribution parameters to obtain visualization data. The invention aims to realize high-precision and real-time reconstruction of the actual light spot form of the micro laser.

The invention provides a robot dynamic obstacle trajectory prediction navigation method based on a visual model, and relates to the field of power equipment maintenance, the method comprises the following steps: collecting original data of dynamic scene multi-modal perception, carrying out space-time alignment, extracting thermal infrared dynamic feature vectors and visual dynamic feature vectors, and carrying out dynamic scene multi-modal perception on the thermal infrared dynamic feature vectors and the visual dynamic feature vectors; simultaneously calculating the fuzzy degree of the visual image and the dynamic complexity of the scene; calculating a fusion weight of the thermal infrared feature and the visual feature through a dynamic modal weight algorithm, and outputting a fusion feature vector; inputting the fusion feature vector into a visual model, and calculating the trajectory probability distribution of the dynamic obstacle; calculating comprehensive uncertainty and risk coefficients based on the trajectory probability distribution; and based on the fusion feature vector and the trajectory probability distribution, integrating the uncertainty and the risk coefficient, and planning an obstacle avoidance path and a decision report in combination with an A algorithm, so as to realize the dynamic navigation of the robot. According to the technical scheme, the reliability and intelligence of robot navigation can be improved, and the navigation requirement of a complex environment is met.

The invention discloses a smart energy monitoring and analysis system and an energy management method. The smart energy monitoring and analysis system comprises a multi-mode sensing unit, an edge computing unit, a dynamic transmission unit, an intelligent analysis unit and a closed-loop control unit. All the units interact based on a standardized protocol to form a five-level collaborative closed-loop architecture from data acquisition to strategy execution. According to the system, the data credibility is improved through multi-modal sensing and self-adaptive calibration, the link efficiency is optimized by utilizing a dynamic hierarchical transmission strategy, collaborative optimization calculation is carried out based on a model in which a physical mechanism and data driving are fused, and therefore comprehensive optimization of photovoltaic consumption, energy storage life and energy consumption economy is achieved in a multi-target scene. According to the invention, the overall efficiency and system adaptability of energy management are remarkably improved, and reliable support is provided for stable and efficient operation of the multi-energy complementary system.

The invention discloses a rapid sensing and positioning method and device in a building scene, and relates to the technical field of cooperative sensing and positioning of tower cranes and ground robots. Through lightweight semantic segmentation and point cloud clustering, a semantic fusion coefficient is calculated in combination with illumination information, the semantic fusion coefficient is compared with a scene fusion credibility threshold, and qualified target instances are screened; acquiring a target motion track based on cross-frame tracking, calculating a track consistency coefficient by combining displacement difference and track smoothness, and comparing the track consistency coefficient with a track consistency threshold to judge track stability; further extracting a three-dimensional center coordinate of the target point cloud cluster, counting continuous frame results, calculating a positioning confidence coefficient, comparing the positioning confidence coefficient with a positioning confidence threshold, and marking the target as a high confidence level, a medium confidence level and a low confidence level; and finally, triggering a corresponding robot to execute a strategy according to the target confidence level, and realizing rapid and reliable building scene sensing and positioning.

According to various embodiments, a sensing device for measuring oxygen concentration cycles in breath is disclosed. The sensing device includes a laser configured to emit light at an A-band of oxygen, a lens configured to collimate the light, and a multi-pass cell configured to contain a replaceable sample cell. The light passes through the multi-pass cell and is attenuated by oxygen in the sample cell. The sensing device further includes a photodetector configurated to convert the attenuated light into an electrical signal, and a lock-in amplifier or an equivalent processing circuit configured to determine oxygen concentration from the electrical signal.

A detection system includes a photodetector, a spatial light modulator (SLM) device optically coupled to the photodetector, and a controller. The controller is operatively connected to the SLM device and is disposed in communication with the photodetector and a memory. The memory has instructions recorded on the memory that cause the controller to communicate a SLM pattern sequence to the SLM device, modulate illumination incident on the SLM device according to the SLM pattern sequence to generate an illumination pulse sequence, and receive an intensity-time profile from the photodetector corresponding to the SLM pattern sequence. The instructions also cause the controller to signal, with spatial specificity, presence of flame or gas when the intensity-time profile indicates that flame or gas is present within a field of view of the detection system. Detection methods and computer program products are also described.

The invention belongs to the technical field of intelligent navigation of agricultural machinery, and particularly relates to an autonomous navigation system of field unmanned transportation equipment after potatoes (such as potatoes and sweet potatoes) are harvested, in particular to a potato operation line identification method based on binocular camera multi-modal information dynamic weighting. Aiming at a complex field environment (soil is loosened and turned over, scattered potato blocks / weeds are mixed, and an original ridge-shaped structure is locally damaged) after the operation of a harvester, a ridge line track required by the driving of a transport vehicle is difficult to stably identify in a scene of strong light overexposure, weak light noisy points and shadow alternation by a traditional visual method. According to the method, an IntelRealSenseD456 active stereoscopic vision binocular camera is carried, RGB images and depth information are fused in real time, and multi-modal data are dynamically weighted based on illumination intensity, so that the robust perception capability of the unmanned transport vehicle on the geometric boundary of the potato ridge is improved, the vehicle is ensured to accurately run along a harvested field ridge operation line, and the situation that the potato blocks are rolled and scattered or deviated from a path is avoided.

The invention discloses a light source system capable of continuously adjusting an attenuation ratio, and belongs to the technical field of optical radiation measurement and photoelectric detection. In order to solve the problems of wavelength dependence, discontinuous adjustment, spectrum distortion and the like existing in an existing light intensity adjusting scheme, a combined structure of an integrating sphere and a diaphragm cylinder is adopted, and the device comprises a light source, the integrating sphere with the high-reflection inner wall, a front-end adjustable diaphragm, the diaphragm cylinder with the extinction inner wall and a rear-end adjustable diaphragm. Continuous attenuation of output light intensity in a predetermined dynamic range is realized by adjusting the apertures of the front and rear diaphragms, the lower limit of attenuation ratio meets the requirement, and the dynamic range can reach more than three orders of magnitude. The system uses the integrating sphere to form a stable Lambert light source, the attenuation process depends on geometric parameters, spectral distribution and spatial uniformity basically remain unchanged, and the non-uniformity of a light-emitting surface is not greater than 5%. The invention further provides a calibration method, high-precision attenuation prediction is achieved through detector measurement and view factor model fitting, and the calibration method is suitable for weak cursor calibration, detector linearity testing and other applications.

The embodiment of the invention discloses a photovoltaic junction box and a photovoltaic panel control system, a positive electrode interface and a negative electrode interface are arranged in the photovoltaic junction box and are respectively connected with the positive electrode and the negative electrode of a photovoltaic panel, the positive electrode and the negative electrode of the photovoltaic panel are both connected with a power line, and a bypass circuit is arranged between the positive electrode interface and the negative electrode interface. And arranging a power line communication circuit between the positive interface and the negative interface to realize data communication according to a power line. Therefore, the communication of the photovoltaic panel is realized under the condition of not arranging an additional device, and the cost of the photovoltaic panel control system is reduced.

According to an aspect, a detection device includes: an optical sensor comprising a plurality of light-receiving elements configured to receive light; and a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film and a plurality of light sources configured to emit light to a first side surface of the light guide film. A wire-grid polarizer configured to separate the light incident from the light source into first polarized light and second polarized light is located between the optical sensor and the front light.

To provide a multispectral sensor array.SOLUTION: A combination of a ranging sensor channel (e.g., a LIDAR sensor channel) and an ambient-light sensor channel tuned to detect ambient light having a channel-specific characteristic (e.g., color). The sensor channels can be arranged and spaced to provide a multispectral image of the field of view in which multispectral images from different sensors are essentially aligned with one another to define an array of multispectral image pixels. Various optical elements may be provided to facilitate the imaging operation. A light ranging / imaging system incorporating a multispectral sensor array can be operated in a rotational mode and / or a static mode.SELECTED DRAWING: Figure 2

The utility model provides a macro-energy laser energy measuring device, which comprises a beam expanding lens, a polarization beam splitter and two wedge-shaped mirrors which are arranged along a light beam propagation path, the polarization beam splitter is matched with the beam expanding lens to divide an expanded light beam into two polarized light beams, and the number of the wedge-shaped mirrors is two. And the two wedge-shaped mirrors are matched with the polarization beam splitter and are used for respectively splitting the two beams of polarized light in proportion and then enabling the two beams of polarized light to enter a light measurement area. According to the utility model, the PBS, namely the polarization beam splitter, is combined with the wedge-shaped mirror, so that the change of the light splitting proportion caused by the thermal depolarization effect of the high-power laser is avoided, and the influence of the polarization state change of the high-power laser under the change of the thermal effect on the measurement is reduced, thereby improving the precision of energy measurement; the light spot area is increased through the beam expanding lens, and the damage threshold is improved; according to the utility model, as the precision of energy measurement is improved, light beams can be prevented from directly hitting on the probe of the energy meter, and after the damage threshold is improved, the damage risk of an instrument is greatly reduced, the service life of the instrument is prolonged, and the measurement cost is reduced.

The invention discloses a DEM-based earth surface solar radiation prediction method, equipment and a medium. The method comprises the following steps: correcting a direct radiation reference value based on nonlinear attenuation of a cloud layer to direct radiation to obtain actual direct radiation; based on the enhancement effect of the cloud layer on the scattered radiation, correcting the scattered radiation reference value to obtain first actual scattered radiation; according to a preset shadow judgment criterion, calculating actual horizontal plane direct radiation after the actual direct radiation reaches the earth surface by taking the condition that the slope surface back to the sun has no direct radiation as a constraint; calculating second actual scattered radiation after the first actual scattered radiation reaches the earth surface according to the control of the sky vision field factor of the earth surface area on the scattered radiation; calculating reflected radiation generated after the actual direct radiation and the first actual scattered radiation reach the earth surface based on the Lambert reflection law; therefore, the total solar radiation is obtained. According to the invention, high-precision quantification of earth surface solar radiation under complex terrain conditions is realized.

The invention provides a photoelectric solar irradiance meter self-calibration device for outdoor monitoring and a calibration method, and belongs to the technical field of photovoltaic monitoring. The device comprises a sky imager, a solar irradiance meter for monitoring, a standard solar irradiance meter, a sealed darkroom, a three-dimensional adjusting bracket and a waterproof sealed box, wherein a dual-channel temperature collector, a dual-channel voltage collector and a control, data processing and storage module are integrated in the waterproof sealed box. The sealed darkroom normally protects the standard irradiance meter to prevent the standard irradiance meter from aging and dust deposition; the dual-channel collector synchronously collects temperature and voltage of a standard solar irradiance meter for monitoring, and supports a calibration algorithm to realize dynamic updating of sensitivity; the three-dimensional adjusting bracket ensures that the device is parallel to the mounting plane of the photovoltaic module, and the angle response matching degree is improved; the sky imager judges the calibration weather condition to guarantee the effectiveness of the calibration environment; the control module realizes automation of a self-calibration process, adapts to an outdoor long-term monitoring scene, and realizes continuous and accurate measurement of photovoltaic solar irradiance.

The invention relates to the technical field of UV adhesive detection and analysis, and discloses a UV adhesive detection data performance analysis method and system based on machine learning. The method comprises the following steps: acquiring optical response time sequence data of a curing process from a multi-dimensional optical sensing array of a UV adhesive production device, and synchronously acquiring real-time working condition parameters of the device; in a multi-layer feature fusion mode, performing noise compensation processing on the optical response time sequence data to obtain a spectral attribute index of a curing reaction, and determining a quality fluctuation period of quality tracking in the continuous curing stage of the UV adhesive according to the spectral attribute index; production line process path information is obtained, defect characteristics are analyzed, interlayer interface defect data in the curing process are obtained, and the defect coupling level is determined in combination with optical response time sequence data; according to the quality fluctuation period and the defect coupling level, early warning is conducted on a dynamic performance attenuation area in the UV glue production process. According to the method, comprehensive monitoring and accurate analysis of the curing process can be realized, and a technical scheme is provided for production quality control.

An apparatus is provided. The apparatus includes a laser generation device configured to emit a laser signal to a semiconductor fabrication component. The apparatus includes a reflection detection device configured to receive a reflection signal comprising light, of the laser signal, reflected by a surface of the semiconductor fabrication component. The reflection detection device includes an optical filter. The optical filter is configured to block light, of the reflection signal, that has a wavelength outside a defined range of wavelengths. The optical filter is configured to provide filtered light, from the reflection signal, that has a wavelength within the defined range of wavelengths. The reflection detection device includes a light sensor configured to generate an electrical signal based upon the filtered light. The apparatus includes a computer configured to determine, based upon the electrical signal, measures of electrostatic field strength at the surface of the semiconductor fabrication component.

The present invention relates to a positioning mark detection method for detecting a positioning mark of a thermal printing medium loaded into a thermal printer by means of an optical sensor provided in the thermal printer to determine a starting position of the thermal printing medium, the optical sensor comprising a light emitting member and a light receiving member, the light emitting part emits first light to irradiate the positioning mark, the positioning mark feeds back second light different from the first light, the light receiving part receives the second light, and the wavelength of the second light is different from that of the first light; the positioning mark detection method comprises the following steps: detecting and sampling; a signal conversion step; judging the initial position of the thermal printing medium; the light emitting part emits the first light to irradiate the positioning mark, the positioning mark is excited to emit the second light, the wavelength of the second light is different from that of the first light, specifically, the wavelength of the second light is longer than that of the first light, and therefore the light receiving part is prevented from being affected by the light emitted by the light emitting part.

This invention relates to the field of intelligent operation and maintenance and non-destructive testing technology for intelligent transportation infrastructure, and particularly to an intelligent identification method and system for the luminescence performance of self-luminescent road surface materials. The method includes: simultaneously acquiring luminescent images of the road surface, LiDAR point cloud data, and carrier pose data via a UAV platform; processing the luminescent images to obtain luminescence brightness distribution information of the road surface; processing the LiDAR point cloud data to extract three-dimensional geometric feature information of the road surface; performing spatiotemporal registration and fusion analysis of the luminescence brightness distribution information and the three-dimensional geometric feature information; diagnosing the causes of luminescence performance degradation based on preset diagnostic rules to obtain diagnostic results; and generating a comprehensive evaluation report on the self-luminescence performance of the road surface based on the diagnostic results. The fully automated acquisition and processing flow of this invention ensures the high objectivity and repeatability of the test results. All data are labeled with spatiotemporal tags, providing a solid data foundation for tracking material performance degradation trends and evaluating maintenance effectiveness.

An apparatus for detecting optical waves comprises one or more closed-loop waveguiding structures (CWSs) formed from a core material, each CWS configured to guide optical waves along a closed-loop path. A coupling waveguiding structure is formed from the core material comprising: a first optical coupling portion configured to optically couple at least a portion of an optical wave propagating through the coupling waveguiding structure into the first CWS, and a second optical coupling portion configured to optically couple at least a portion of an optical wave propagating through the coupling waveguiding structure into the first CWS. A first absorbing structure is in optical communication with the first CWS. Circuitry is configured to detect optical waves at least partially absorbed by the first absorbing structure. The coupling waveguiding structure is configured to guide optical waves along a path outside the one or more CWSs.

The invention relates to a single-photon spectrometer (10) having at least one dispersion element (40) which has a first optical dispersion, and having a photon detector (30) which is arranged to detect at least one photon (15) which has passed through the dispersion element (40), and having a time-of-flight meter (60) which is designed to automatically measure a propagation time (t) of the at least one photon (15) through the dispersion element (40), wherein the photon detector (30) is designed to automatically determine a wavelength (λ) of the at least one photon (15) from the propagation time (t).

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.

The present application discloses a sensor device for monitoring a laser processing process by means of a laser beam by detecting the intensity of a process beam generated during the laser processing process, the sensor device comprising: an optical input for introducing the process beam; a beam splitter arrangement configured to couple several visible partial beams with respective visible wavelength ranges from the process beam; a first photosensor arrangement for detecting the intensity of the process beam in the visible wavelength range with several photosensors arranged to each detect an intensity of one of the visible partial beams, wherein the beam splitter arrangement is configured to detect a first visible partial beam with a first visible wavelength range, a second visible partial beam with a second visible wavelength range,to couple a third visible partial beam with a third visible wavelength range and a fourth visible partial beam with a fourth visible wavelength range to a photosensor of the first photosensor arrangement, wherein the first photosensor arrangement comprises: a first photosensor arranged to detect an intensity of the first visible partial beam, a second photosensor arranged to detect an intensity of the second visible partial beam, a third photosensor arranged to detect an intensity of the third visible partial beam (40a), and a fourth photosensor arranged to detect an intensity of the fourth visible partial beam. Furthermore, a laser processing system with the sensor device is disclosed.

The present disclosure provides a contact-less detection using a cross-cavity device where a small dielectric sample is placed at its center. The optical properties of the sample, such as the Kerr and Faraday rotation, or polarizability, manifest in the coupling between the cavities' electromagnetic modes and in the shift of their resonant frequencies. By calculating the dynamics of what are referred to herein as geometrical photonic states, a measuring protocol is formulated based on the quantum metric that maximizes the Fisher information and isolates the individual components of the complex dielectric function.

The present disclosure generally pertains to event detection circuitry configured to: obtain a photon detection signal, which is indicative of a photon being incident on a photo detection unit; associate the photon detection signal with a photon detection time period; and detect an event if, within a predetermined integration time period, a difference is detected between a number of associations of the photon detection signal with a photon detection time period and a number of associations of a previous event.

The detection device comprises a light source mechanism and a detection mechanism, light rays emitted by the light source mechanism can be coupled into a waveguide substrate and totally reflected in the waveguide substrate, and the detection mechanism is used for collecting information of light spots formed by the light rays at total reflection points of the waveguide substrate. The optical characteristics of the waveguide substrate are determined according to the information of the light spots. According to the technical scheme of the embodiment of the utility model, the optical detection of the waveguide substrate is realized, the detection cost is reduced, and the detection efficiency is improved.

A method includes illuminating a surface of a sample with a first light having a first wavelength (λ1) and detecting first intensities of a first photoluminescence induced within the sample by absorption of the first light by the sample. The method also includes illuminating the surface of the sample with a second light having a second wavelength (λ2) that is different from the first wavelength and detecting second intensities of a second photoluminescence induced within the sample by absorption of the second light by the sample. The method also includes generating an output representing the first intensities and the second intensities.

The invention provides a flexible solar cell irradiation attenuation coefficient estimation method comprising the following steps: orbital parameters are combed, and spacecraft orbital parameters and space environment parameters are obtained; based on the orbit parameters and the space environment parameters, establishing an irradiation dose calculation model of the flexible solar cell; performing a ground equivalent test based on the irradiation dose calculated by the irradiation dose calculation model; and determining the irradiation attenuation coefficient of the solar cell in combination with test data and historical data. According to the method for estimating the irradiation attenuation coefficient of the flexible solar cell, the irradiation dose calculation model suitable for the flexible solar cell is constructed, the on-orbit performance attenuation coefficient of the solar cell array can be accurately obtained, and the accuracy of irradiation dose estimation is improved; scientific basis is provided for solar cell array design and on-orbit energy management, and reliability and design rationality of a spacecraft energy system are effectively improved.

To provide a particle counter with improved convenience.SOLUTION: A particle counter 1 that counts particles contained in a sample fluid flowing in a channel using irradiation light La, includes: a multi-flow cell 80 having a plurality of flow cells 10a-10j; an X-axis actuator 62 for adjusting the position of the optical path of the irradiation light La in accordance with selected flow cells 10a to 10j for the multi-flow cell 80; and adjusting units 100, 200 and 300 for adjusting the conditions of the irradiation light La irradiated into channels of the selected flow cells 10a to 10j.SELECTED DRAWING: Figure 1

This invention provides a high-definition display device with a light detection function. [Solution] A display device having a first pixel, a second pixel, and a third pixel, wherein the first to third pixels each have a first sub-pixel, a second sub-pixel, and a third sub-pixel, respectively, the first and second pixels share a fourth sub-pixel, the third pixel has a fifth sub-pixel, full-color display is possible using the first to third sub-pixels, and the fourth and fifth sub-pixels each have one of the following different types: an infrared light emitting device, a first light receiving device, and a second light receiving device.