455 results about "Light attenuation" patented technology

The invention relates to the technical field of LED reliability testing, and provides an LED lamp residual life prediction method, device and equipment, and the method comprises the steps: carrying out the real-time collection of the operation state parameters of an LED lamp, obtaining the operation state data, environment data and work load data, inputting the operation state data into a preset degradation model for analysis, and obtaining the residual life of the LED lamp. Obtaining a real-time degradation trend curve and analyzing a degradation trend interval; and carrying out weighted fusion calculation on the degradation trend interval by utilizing the environment data and the working load data to obtain a residual life prediction value of the LED lamp, and generating a residual life prediction report according to the residual life prediction value of the LED lamp. By collecting operation state parameters, environment data and working load data of the LED lamp in real time and generating a residual life prediction report, life changes of the LED lamp in different environments and working conditions are achieved, and the problem that an existing light attenuation detection method neglects factors of environment and load changes, and life prediction is not accurate is solved.

The invention discloses a device and a method for intelligently investigating types and quantity of fishes. The device comprises a self-adaptive sonar detection module, a three-dimensional image acquisition module, an image preprocessing module, a fish detection module, a main body segmentation module and an identification and classification module. The sonar module is integrated with a three-frequency-band transducer, can dynamically switch frequency according to fish school depth, and realizes target tracking counting and quantity estimation in combination with an algorithm; the image acquisition module constructs a fish school three-dimensional image model by combining a depth camera with a light attenuation compensation algorithm; the preprocessing module fuses acoustic and optical features and expands a data set; the detection and segmentation module is used for accurately positioning fishes and removing impurities; the identification and classification module realizes type identification based on transfer learning and supports incremental learning of new fingerlings. According to the method, through cooperation of multiple modules, the problems of insufficient detection precision, poor image quality and the like in traditional investigation are solved, efficient and accurate investigation of fish species and quantity is realized, and technical support is provided for fishery resource management and ecological protection.

The present disclosure provides a method for remote sensing blue-green wave band ratio logarithmic water depth retrieval of wavelet spline instantaneous tidal height correction, and belongs to the field of remote sensing water depth retrieval. Aiming at water depth retrieval precision reduced by blue-green light and a tidal height in a remote sensing water depth retrieval process, the model fully considers a linear correlation between an attenuation ratio of the blue-green light in water and a depth, the smoothness of the tidal height, and the characteristics of consistent convergence, first-order continuous derivation and second-order continuous derivation of the tidal height with time change, and constructs the method for remote sensing blue-green wave band ratio logarithmic water depth retrieval of wavelet spline instantaneous tidal height correction, and according to Molokai experiment verification, compared with an early model, the invention improves the remote sensing water depth retrieval precision.

The invention relates to the technical field of image recognition, in particular to a bridge pier underwater structure image intelligent analysis method and system, and the method comprises the following steps: obtaining RGB channel values of all pixels of a bridge underwater structure image region, converting a main color temperature, generating a color temperature map, dividing the region in a vertical direction, extracting a main color temperature track, and carrying out the linear fitting. And comparing the residual error with a continuity threshold, and marking a color temperature continuous section. According to the method, a two-dimensional map is constructed through fusion of main color temperature and space coordinates, spatial distribution expression of a structural region is enhanced, a stable region is extracted by combining residual and continuity discrimination, interval judgment and RGB finishing are introduced into gray scale lifting, image brightness balance and color consistency are enhanced, a gray scale trend model is constructed through radial chain grouping, and light attenuation interference stripping is achieved. Feature point continuous frame tracking is combined with disturbance vector mapping, structure dynamic changes are captured, abnormal behaviors are recognized through cross analysis of tension differences and response terms, and efficient recognition and interference isolation under multi-dimensional feature fusion are achieved.

The invention discloses a smart city energy management system based on energy conservation and emission reduction, and relates to the technical field of smart city energy management. By using an intelligent sensor group, illumination related data of illumination equipment is obtained, an illumination related data set R is constructed, and a light attenuation factor Gs, a convective heat transfer index DL and a use intensity factor Qd are extracted; the method comprises the following steps: dynamically evaluating the thermal load intensity of an urban area, scientifically dividing thermal risk grades, combining performance brightness prediction and control strategy matching to realize subarea and lamp-divided refined dimming control, using a feedback self-evaluation and optimization regulation and control mechanism, carrying out power reestimation and strategy alternation on an area with a substandard control effect, and carrying out power control on the area with the substandard control effect. Redundant energy consumption is effectively reduced, heat accumulation is restrained, and the lighting efficiency and the environment comfort degree are improved.

The invention provides a communication equipment fault prediction method and system based on big data and an optical fiber sensor. The method comprises the following steps: generating a dynamic physical topology model according to a multi-source heterogeneous data matrix in combination with a light attenuation characteristic value and a signal transmission direction identifier of a distributed optical fiber sensor; based on a spatial constraint condition of the dynamic physical topology model, separating an abnormal fluctuation component associated with at least one of temperature abnormal data and vibration abnormal data of the communication equipment from the optical signal data to generate a cross-modal abnormal associated feature set; and through a collaborative constraint rule, analyzing the cross-modal abnormal association feature set, and generating a communication equipment fault prediction result for early warning in advance. According to the technical scheme provided by the invention, the multi-source heterogeneous matrix and the dynamic topology model are constructed based on the distributed optical fiber sensing data, and accurate early warning is carried out on the fault position and type of the communication equipment in advance through cross-modal abnormal association feature analysis.

The invention provides a liquid crystal display lightening parameter self-adaptive calibration method, and relates to the technical field of image display. The method comprises the following steps: firstly, establishing a characteristic matrix and a parameter library of liquid crystal molecules, and dynamically correcting according to a real-time working state; and based on the characteristic matrix and the parameter library, executing pixel-level forward prediction on the input image, and generating a color error distribution diagram by solving a coupling solution of a liquid crystal molecule dynamic response differential equation and a backlight attenuation compensation equation. And taking the error distribution diagram as input, obtaining a gradient optimization direction of the calibration parameter mapping diagram through back propagation calculation, and iteratively approaching the optimal pixel value compensation amount in each frame period. And injecting a test pulse into the characteristic pixel point, capturing a voltage response curve through a sampling circuit, and converting the voltage response curve into a real-time correction value mapping graph. And finally, carrying out weighted fusion on the real-time correction value mapping graph and the pixel value compensation amount to generate a calibration parameter mapping graph. The self-adaptive calibration of the display parameters is improved, and the display consistency and the color accuracy are effectively improved.

The invention provides a data processing method and system for an aerosol analyzer, and belongs to the technical field of data processing of aerosol analyzers, and the method comprises the following steps: collecting light absorption signals of aerosol particles according to a light source system and a detector, and generating an original electric signal; preprocessing the original electric signal to obtain preprocessed data; extracting an absorption coefficient, a multiband light attenuation characteristic and a mass concentration parameter of the black carbon aerosol from the preprocessed data; analyzing the features based on a machine learning model, outputting a real-time prediction result of the concentration of the black carbon aerosol, and preprocessing the original electric signal to obtain preprocessed data, including the step of noise removal. According to the method, baseline drift is dynamically corrected through a polynomial fitting algorithm, wavelet transform denoising and a machine learning model are combined, the accuracy and real-time performance of black carbon aerosol concentration detection are remarkably improved, and the problems that in a traditional method, manual intervention is much, and the model generalization ability is poor are solved.

The invention discloses a headlamp light-emitting diode structure and a headlamp light-emitting diode system, and belongs to the technical field of automobile illumination, the headlamp light-emitting diode structure comprises a headlamp light-emitting diode structure, an intelligent driving circuit, an environment perception and intelligent control system and an energy recovery and management system.The heat dissipation efficiency is effectively improved by arranging a unique heat dissipation structure, and the heat dissipation efficiency is improved; the temperature of the LED chip is reduced, the light attenuation is reduced, the service life of the LED chip is prolonged, the frequency and cost for replacing the lamp are reduced, the design of the composite optical lens and the special reflection cup enables light distribution to be more uniform, the illumination range is wider, the driving safety at night and under complex road conditions is improved, and the driving safety is improved. By arranging the intelligent driving circuit and the environment sensing system, the LED chip is ensured to work stably in different environments and working conditions, and the problems of flickering and unstable brightness are avoided. Meanwhile, lighting parameters are automatically adjusted according to the environment and the vehicle speed, and the driving comfort and safety are improved.

The invention provides a clothing 3D virtual fabric texture dynamic simulation method and device, equipment and a medium, and the method comprises the steps: obtaining multi-layer fabric data, carrying out the mathematical modeling of the microstructure features and macroscopic physical attributes of the multi-layer fabric data, and obtaining a hierarchical material model; calculating vertex displacement data and interlayer contact pressure of the fabric data of each layer in the dynamic deformation process through a physical engine, and generating vertex coordinates and deformation gradient data after deformation; constructing a dynamic light transmittance field according to the deformation gradient data and the hierarchical material model, and generating a light transfer matrix representing an interlayer light attenuation relationship through a ray tracing algorithm; performing dynamic displacement compensation on the UV coordinates based on the deformed vertex coordinates and the light transfer matrix to generate a corrected UV coordinate set; and inputting the dynamic light transmittance field and the corrected UV coordinate set into a rendering pipeline, performing multi-channel optical characteristic fusion calculation, and outputting virtual rendering data. By adopting the method, the authenticity of dynamic simulation of the multi-layer fabric can be improved.

The invention relates to the technical field of geological exploration, in particular to an underground environment data acquisition method and system for three-dimensional simulation environment modeling, working condition parameters are acquired and input into a CFD model, and an underground dynamic risk map is generated based on shock wave signals; the method comprises the following steps: collecting water mist data to construct a humidity field, and embedding humidity field data into a dynamic risk map generation process, which comprises the following steps: in an injection compression period, solving an N-S equation set, detecting and encrypting a key area grid through a pressure gradient, and generating a burst dust cloud form and density distribution. The results of four stages of turbulence evolution are fused to form a five-dimensional tensor structure including space coordinates, duration time, humidity compensation risk levels, a water film distribution thermodynamic diagram and a water mist light attenuation coefficient, different risk areas can be clearly marked, switching of data acquisition strategies is guided, the problems of artifacts and distortion are effectively solved, and the accuracy of data acquisition is improved. Accurate point cloud data can be obtained in a complex environment.

The energy-saving automobile lamp with the installation angle adjusting structure comprises an automobile body, an installation plate and a lampshade are installed on the left side of the automobile body in an embedded mode, and an automobile lamp assembly is arranged in the lampshade; the automobile lamp further comprises supporting plates symmetrically and fixedly connected to the left side of the mounting plate, a movable frame is rotationally connected between the two supporting plates through a rotating shaft, the automobile lamp assembly is hinged to the inner wall of the movable frame through a rotating plate, and the shaft end of the rotating plate is fixedly sleeved with a first worm wheel. According to the energy-saving automobile lamp with the mounting angle adjusting structure, a worker rotates a first worm and a second worm to drive a first worm gear and a second worm gear correspondingly, so that a rotating plate and a rotating shaft achieve up-down angle adjustment and left-right angle adjustment of the automobile lamp assembly, and the angle is stable and resistant to vibration after adjustment; meanwhile, the heat conduction telescopic rod on the outer side of the automobile lamp assembly is matched with flowing of outside air through the air inlet channel and the air outlet channel when the automobile runs, heat is discharged for efficient heat dissipation, and light attenuation is avoided.

According to the feedback control circuit, the control method and the switching power supply applying the feedback control circuit, a secondary side controller serves as a main controller, and a current generation and mirror image module and a control signal generation module are arranged in the secondary side controller; the current generation and mirroring module generates a first current based on the output voltage or the signal representing the output voltage and the first voltage signal, and mirrors the first current into a second current; the control signal generation module generates a control signal based on the second current; and the secondary side controller realizes feedback control of the loop based on the control signal. Through the arrangement, an optocoupler is not needed, the current mirror image module can be compatible with an existing peripheral circuit structure, the structure is simple, and the transmission delay of the current mirror image module is far smaller than that of the optocoupler, so that unnecessary poles can be reduced, and a corresponding compensation network structure can be simplified; and the current mirror image module has better current and temperature stability and smaller temperature excursion, so that the light attenuation effect of an optocoupler can be avoided, and the service life of the current mirror image module is longer.

To provide a light measuring device, a method for measuring light, and a calibration system which can eliminate the issue that measured values cannot provide a linear continuity in a case where an optical attenuation member is inserted in an optical path of measurement target light and in a case where an optical attenuation member is not inserted in the optical path.SOLUTION: The present invention includes: a light reception unit having at least one light reception sensor 13b, 14b, and 15b for receiving light from measurement target light 2 from a measurement target object 1; control means 17 for calculating a measured value on the basis of output from the at least one light reception sensor; an optical attenuation member 40 removably provided in the optical path of the light measurement target light 2, the optical attenuation member attenuating light which enters the light reception unit; and correction means for correcting the difference between the measured value calculated by the control menas 17 when the attenuation member 40 is inserted in the optical path, the measured value being changed according to characteristics of the measurement target object 1, and a measured value calculated by the control means 17 when the optical attenuation member 40 is not inserted in the optical path.SELECTED DRAWING: Figure 1

The invention relates to the field of communication network equipment operation and maintenance optimization, in particular to an internet quality intelligent judgment and optimization method, which comprises the following steps: S1, according to an acquisition machine deployed on OLT (Optical Line Terminal) equipment, communicating with the OLT equipment through an SNMP (Simple Network Management Protocol) to obtain real-time operation state data of the equipment, and preprocessing the acquired data; s2, key features of fault judgment are extracted from the data through the feature extraction technology, and real-time fault judgment is conducted on newly-collected data according to the trained model; s3, analyzing the traffic congestion condition in the network by monitoring the port traffic data in real time; s4, analyzing the attenuation condition of the optical fiber line by monitoring the light attenuation data of the OLT equipment in real time; and S5, providing an optimization scheme through comprehensive evaluation of fault judgment, flow congestion analysis and light attenuation analysis, and the method can improve network performance, troubleshooting and prevention of faults, improve user experience and reasonably utilize resources.

To provide a light measuring device and a method for measuring light which can suppress increase of measurement errors and enlarge a dynamic range by inserting an optical attenuation member into an optical path for measurement target light or removing the optical attenuation member from the optical path for measurement target light.SOLUTION: The light measuring device includes: a division optical system for dividing a measurement target light from a measurement target object into plural measurement target lights; a wavelength selection filter which the measurement target lights formed by division by the division optical system enter; and a color measurement optical system having a light reception sensor for receiving the measurement target light having passed through the wavelength selection filter. The light measuring device further includes a light attenuation member which can be inserted into an optical path for measurement target light or can be removed from the optical path for measurement target light, and the light attenuation member is arranged ahead of the division optical system.SELECTED DRAWING: Figure 1

The invention relates to the technical field of illuminometer calibration, and discloses a calibration device and a calibration method of an illuminometer for measuring medium and low illuminance. The calibration device comprises an integrating sphere assembly, a light source control module, a reflecting plate adjusting module, a spectrum monitoring module and a calibration execution module. A plurality of fixing holes are formed in the integrating sphere assembly, the light source control module achieves stable light intensity output through a dynamic current distribution algorithm and PID closed-loop control, the reflecting plate adjusting module compensates edge light attenuation through a self-adaptive positioning algorithm, and the spectrum monitoring module evaluates spectrum stability through a spectrum matching algorithm. And the calibration execution module adopts a nonlinear error correction algorithm to improve the calibration precision. The calibration method comprises the steps of initializing the device, adjusting the height of the reflecting plate, collecting data to generate a calibration curve, correcting errors, testing at multiple angles and the like. According to the invention, the defects of the traditional calibration technology can be effectively overcome, and the calibration precision and reliability of the medium and low illumination illuminometer are improved.

The invention discloses a light attenuation assembly, an optical module, an optical device and related equipment. The light attenuation assembly comprises a half-wave plate, a first polarization beam splitter and a second polarization beam splitter which are sequentially arranged along a light path. The half-wave plate is used for converting the first linearly polarized light into second linearly polarized light, and the second linearly polarized light can be decomposed into third linearly polarized light and fourth linearly polarized light of which the polarization directions are perpendicular to each other; the first polarization beam splitter is used for dividing incident second linearly polarized light into third linearly polarized light and fourth linearly polarized light, reflecting the third linearly polarized light to the second polarization beam splitter, and transmitting and filtering the fourth linearly polarized light at the same time; and the second polarization beam splitter is used for reflecting and outputting the third linearly polarized light and transmitting and filtering the residual fourth linearly polarized light. Through the light attenuation assembly, the quality of the output laser beam can be improved.

A method for calculating an IPA of an intravascular OCT image, relating to the technical field of medical instruments, the method including: acquiring an intravascular OCT image (S101); determining a calcified plaque region of the intravascular OCT image (S102); determining a light attenuation coefficient of the intravascular OCT image, where the light attenuation coefficient of the intravascular OCT image does not include a light attenuation coefficient of the calcified plaque region (S103); and determining an IPA of the intravascular OCT image according to the light attenuation coefficient of the intravascular OCT image (S104). The above method can increase accuracy of an IPA.

The invention discloses a control method for a light source type medical beauty product with constant energy output. Aiming at the problem that the later performance of the existing light source type medical beauty product is reduced due to fixed power output and light attenuation characteristics, the initial light source rated power PRATED is calibrated through a built-in light source light attenuation curve characteristic table. When a product works, the accumulated working time of the light source is recorded in real time, the corresponding light attenuation coefficient k is searched, and a new duty ratio signal is calculated according to the light attenuation coefficient k and PRATED to adjust power drive, so that the energy output of the target light source is maintained. The invention has the advantages of effectively overcoming the influence of light attenuation, controlling the output fluctuation of light source energy in an extremely small range in a long-time use process through experimental verification, ensuring the stable performance of the product in the whole life cycle, continuously providing a stable beauty effect and improving the user experience, and has important application value in the field of medical beauty.

The invention discloses an intelligent illumination control system for a rail transit LED, and relates to the technical field of rail transit illumination, and the system comprises a distribution module, an analysis module and a compensation module. And the distribution module is used for arranging a plurality of LED lamps through a multi-row linear arrangement method. According to the invention, the current, inductance and temperature data of each LED lamp are collected through the microcontroller, the light attenuation speed of each LED lamp is predicted based on the data, different measures are provided according to the predicted light attenuation speed of the LED lamp, when the light attenuation speed of the LED lamp is a primary level, the LED lamp is ignored, and when the light attenuation speed of the LED lamp is a middle level, the LED lamp enters the compensation module, and the LED lamp enters the compensation module. When the light decay speed of the LED lamp is high-grade, maintenance personnel are timely notified to carry out maintenance through telephones, short messages or mails, potential problems of the LED lamp are timely found and solved through grading processing of the light decay speed, and the stability of the whole lighting system can be improved.

The invention relates to a brain blood oxygen monitoring method and device, and relates to the technical field of biomedical engineering.The method comprises the steps that a light attenuation signal generated when near-infrared light penetrates through the brain and a motion signal of the brain are synchronously collected, the motion signal and the light attenuation signal are coupled, and an infrared light-acceleration coupling signal is formed; preprocessing the infrared light-acceleration coupling signal to obtain a pure coupling signal; filtering the pure coupling signal through a quality evaluation mechanism to obtain an effective coupling signal; the effective coupling signals are input into a dual-wavelength ratio model, and the percutaneous blood oxygen saturation is calculated by fusing an experience calibration equation. By improving the algorithm, the accuracy of near-infrared brain blood oxygen monitoring can be effectively improved, and the signal error caused by head shaking can be reduced in combination with the motion monitoring function of the three-axis acceleration sensor.

The invention relates to the technical field of quantum key distribution, in particular to a quantum key distribution device and method based on soliton optical combs. A soliton optical comb chip is used as a light source, the light source enters a quantum key coding chip, quantum state coding is achieved after pulse light generation, wavelength multiplexing, multi-quantum key protocol coding and light attenuation, and the light source is input to a multi-wavelength multi-path optical switching chip for path selection. After passing through the optical fiber channel, the signal light is input into the quantum key decoding chip to be decoded and detected. According to the invention, multiple users can use different protocols to carry out quantum key distribution, quantum states carrying different coding modes carry out quantum communication with different communication parties based on wavelength decoupling, and construction of a quantum communication network can be supported.

The invention, which belongs to the technical field of Micro-LED display, provides a vertically stacked Micro-LED full-color micro-display comprising a substrate unit, a pixel stacking unit and a connecting unit. The plurality of pixel stacking units are vertically stacked on the substrate unit, and electrical connection and mechanical connection are realized through the connecting units; each pixel stacking unit comprises a plurality of sub-pixel structures with different light emitting colors, each sub-pixel structure is provided with an anode contact part and a cathode contact part, the anode contact parts are connected with the anodes of the substrate units through the connecting units, and the cathode contact parts are connected with the cathodes of the substrate units through the connecting units. The problems that in an existing Micro-LED full-color display technology, large-amount transfer precision and yield are difficult to consider at the same time, color conversion efficiency is low, light attenuation is serious, a traditional vertical stacking technology is complex, bonding layer damage and performance degradation are likely to be caused are solved, and high-brightness wide-color-gamut display, efficient production and large-scale mass production are achieved.

The invention provides carbon aerogel for wastewater purification and hydrogen production through water photolysis and a preparation method of the carbon aerogel, Au / Cu-MOF / SA carbon aerogel serves as a photothermal evaporation module to be used for interface photothermal wastewater purification driven by solar energy, and ZnIn2S4 / Au / Cu-MOF / SA carbon aerogel serves as a photocatalytic reaction module to be used for photocatalytic hydrolysis hydrogen production. By designing the composite carbon aerogel, solar energy is positioned on a gas-liquid interface for evaporation of wastewater; and then the purified distilled water is used as a raw material for hydrogen production through photocatalytic hydrolysis, so that integration of wastewater purification and hydrogen production through water photolysis is realized. The upper photo-thermal layer and the photocatalytic layer are exposed on the water surface due to the self-floating characteristic of the system, so that efficient light transmission can be realized, light attenuation caused by water can be reduced to the greatest extent, and the problem that a traditional powder photocatalyst is difficult to recycle can be effectively solved; hydrogen can be stably generated for a long time in waste water containing various pollutants, and great commercial application potential is achieved.

The lamp comprises a lamp body and a light source, the interior of the lamp body is hollow, a cavity is formed in the lamp body, the inner wall of the lamp body is provided with a light inlet face and a light outlet face which are used for transmitting light, the inner wall of the lamp body is further provided with a first light reflecting face used for reflecting light, and the light outlet face is located on one side of the light inlet face; the light source is arranged on the lamp body, and the light-out end of the light source is opposite to the light-in face. Wherein at least part of the first light reflecting surface inclines towards the light emitting surface, and light rays emitted by the light source enter the cavity through the light inlet surface and are emitted from the light emitting surface after being reflected by the first light reflecting surface. According to the LED lamp, after light enters the cavity from the light inlet face, part of parallel light is firstly projected to the inclined face and is reflected by the inclined face to the end, away from the light source, of the light outlet face, a dark area appearing at the end, away from the light source, of the light outlet face due to light attenuation is filled, and the light of the light outlet face of the lamp is dispersed more evenly; therefore, a more uniform light emitting effect is obtained.

The invention discloses a substation emergency lighting self-service power supply system, and relates to the technical field of emergency lighting power supply, and the system comprises the following steps: installing a sensor and a communication module, and setting basic parameters; collecting data, dynamically calculating illumination requirements, and compensating visual delay of human eyes; reading battery parameters, and quantifying the aging degree and the residual available capacity of the battery; calculating the power supply priority of each node by combining the emergency exit position based on the adjacent node state; the LED driving current is dynamically adjusted according to the priority, and gradient switching is adopted when the brightness changes in a large range; the low-electric-quantity node automatically initiates help seeking, and the surrounding nodes reduce own brightness in proportion; operation data are uploaded regularly, algorithm parameters are optimized, and a positioning signal is activated to guide maintenance when the battery is seriously lack of electricity. According to the invention, through the double-variable dynamic model coupling the ambient light attenuation compensation factor and the battery health degree attenuation function, the error accumulation of a single electric quantity criterion is eliminated, so that the power supply duration prediction better fits the real working condition.

The invention relates to the technical field of street lamp monitoring and control, and particularly discloses an intelligent street lamp monitoring and control system and method based on the Internet of Things. Comprising an edge calculation module, a multi-modal data fusion module, an edge processing module, a health prediction module and the like. The method comprises the following steps: collecting and preprocessing multi-dimensional data of a street lamp, and generating a multi-modal feature vector by using a Kalman filtering algorithm; outputting a reference PWM duty ratio through the reinforcement learning Q network, and obtaining an optimal PWM duty ratio in combination with light attenuation compensation analysis; constructing a residual life prediction model based on the long-short-term memory network, predicting the residual service life of the street lamp, and determining the optimal operation power in combination with the power consumption time period; and executing corresponding control operation on the street lamps based on the optimal PWM duty ratio and the optimal operation power, and monitoring and displaying abnormal street lamps at the same time. Intelligent monitoring and accurate control of the street lamp are realized, illumination quality and energy conservation are considered, the service life can be pre-judged, timely maintenance is realized, and the intelligent and efficient management of the urban street lamp is improved.

The invention relates to the technical field of vehicle illumination, in particular to a method and device for reducing light decay of an LED lamp, computer equipment and a storage medium, and the method for reducing the light decay of the LED lamp comprises the steps: obtaining a vehicle starting message, and obtaining an LED lamp starting instruction from the vehicle starting message; obtaining the number of to-be-started LED lamp beads according to the LED lamp starting instruction, and calculating the number of to-be-started power supplies according to the number of the to-be-started LED lamp beads; responding to the LED lamp starting instruction according to the number of the power supplies to be started, and detecting LED brightness data in real time to obtain real-time LED lamp bead brightness data; and when the brightness data of the LED lamp bead is lower than a preset value, generating a light attenuation compensation instruction, and generating a power supply adding instruction according to the light attenuation compensation instruction so as to increase the brightness data of the LED lamp bead to be higher than the preset value. The method has the effect of improving the flexibility of adjusting the working state of the LED lamp of the motorcycle or the electric vehicle.

A nuclear radiation detector composed of a PMMA light guide comprises a PMMA light guide plate, a scintillator plate, an optical coupling silica gel layer and a photomultiplier, and is characterized in that the PMMA light guide plate and the scintillator plate are connected through the optical coupling silica gel layer, and the scintillator plate is arranged on the top surface of the PMMA light guide plate; an embedded groove is formed in the PMMA light guide plate; the photomultiplier is installed in the embedded groove and located on one side of the PMMA light guide plate, and an optical coupling silicone grease layer is arranged between the photomultiplier and the embedded groove; according to the device, light attenuation can be greatly reduced, far-end light collection is increased, overall consistency is improved, and alpha and beta detection efficiency is improved; the dead zone light loss can be reduced, the light collection efficiency is improved, the detection efficiency of the tail end is improved, the overall consistency is further improved, and the alpha and beta detection efficiency is further improved; according to the invention, the overall dimension of the detector assembly can be reduced, the distance from the detector assembly to the far end is also increased, the light collection efficiency is improved, and the overall consistency and the alpha-beta detection efficiency are further improved.