370 results about "Light attenuation" patented technology

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 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.

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 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 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.

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.

The invention discloses a control system for detecting light attenuation and self-compensation of an LED heating lamp panel, and relates to the field of semiconductor wafer heating and cleaning, the system collects illumination data of the LED heating lamp panel through a spectrum detection unit, a main control unit compares real-time illumination data with target illumination data, and then the input power of the lamp panel is adjusted to realize self-compensation; the temperature detection unit and the current detection unit respectively monitor the temperature of the lamp panel and the current of the power supply loop, and stop the self-compensation operation in case of abnormality; after illumination collection or power adjustment is completed every time, the lamp panel enters a zero-power input stage to be cooled; after the self-compensation is completed, the main control unit transmits the adaptive power value to the equipment upper computer so as to update the process parameters; according to the system, automatic detection and accurate compensation of light attenuation of the LED heating lamp panel are achieved, manual intervention is not needed, the stability of the light power density of the LED heating lamp panel is guaranteed, the equipment loss is reduced, and the wafer cleaning quality and the production efficiency are improved.

The invention belongs to the technical field of image processing, and discloses an underwater dredging robot terrain recognition method and system, and the method comprises the steps: obtaining an illumination attenuation coefficient through the shooting depth and plankton information, accurately correcting the influence of illumination on an image, and carrying out the brightness adjustment of the image based on the illumination attenuation coefficient, so as to enable the terrain features to be more prominent. Utilizing Laplace decomposition to obtain a multi-layer topographic image, and realizing multi-scale analysis; the accuracy of terrain analysis is improved by screening an edge texture region; the defogging weight is determined in combination with the illumination attenuation coefficient, and the dark channel prior is adopted for defogging recovery, so that the defogging effect is effectively removed, and the image visibility is improved. And reconstructing and synthesizing a complete image through an inverse Laplacian pyramid to obtain an underwater topographic image of which the quality is comprehensively improved, and further obtaining underwater topographic information. The method not only improves the image quality, but also achieves the precise analysis and recognition of the underwater topography, and provides powerful technical support for the research of the underwater topography.

The invention relates to a power industry Ethernet switch optical port test system, method, device and equipment, a storage medium and a program product, and relates to the technical field of optical fiber communication. The system can improve the power industry Ethernet switch optical port test efficiency. The system comprises a test environment control module, a network tester, a variable optical attenuator and a switch to be tested. The test environment control module configures the network tester, the variable optical attenuator and the switch to be tested according to the configuration information; the network tester generates a network test message under the target test case, and records a receiving and sending statistical result of the network test message; the adjustable optical attenuator records and displays the adjusted optical attenuation parameters; the to-be-tested switch realizes a switch optical port function under the target test case, and collects an optical power value in an optical port test process; and the test environment control module summarizes and analyzes the receiving and transmitting statistical result, the optical attenuation parameter and the optical power value, and outputs a test result information set of the target test case.

The invention relates to the technical field of photo-thermal control, and provides a distributed photo-thermal correction method and system for an MIP LED display screen. Deploying sensors on the surface of the display screen, and constructing a sensor network among the sensors to collect photo-thermal data of the display screen; performing model construction based on the photo-thermal data and the material parameters of the display screen, and generating a first model representing light attenuation and a second model representing heat conduction; coupling the first model and the second model to generate a photo-thermal coupling model; performing optimization driving on each LED through the photo-thermal coupling model and preset target bright color parameters to generate driving parameters; and distributing the driving parameters to a control unit of the LED so as to control the operation of the LED. The photothermal effect can be accurately simulated through model construction and coupling, so that the LEDs are optimally driven, driving parameters are generated, and then operation is distributed and controlled, the accuracy of display correction is improved, and the stability and uniformity of the display effect of the display screen are enhanced.

A laser scanning device of an UAV-borne LiDAR for water depth measurement, LiDAR, and an UAV are provided. In the laser scanning device, through synchronous driving of two motors, when the incident laser beam completes a 360° light spot scanning process by the rotation of a light-plane reflecting rotating mirror, and a scanning beam is in position ranges of 0°-X° and (360-X)°-360°, a photodetector protection assembly just rotates to an area with a light attenuation value of 0, or an occlusion-free area. Light echoes generated by the scanning beams in the ranges enter a photodetector without attenuation, while the scanning beam in the range of X°-(360-X°) is occluded by a notched circular shield, and stray light generated by the occlusion cannot enter the photodetector due to attenuation of a circular light attenuation sheet or occlusion of an unnotched part of the circular blocking sheet.

The invention discloses an LED lamp strip convenient to install and use, which comprises a plurality of lamp strip units connected in parallel, a positive electrode conductive wire and a negative electrode conductive wire are respectively arranged below the lamp strip units, the positive electrode conductive wire is connected with positive electrode conductive copper foils of the lamp strip units through a plurality of positive electrode connecting wires, and the negative electrode conductive wire is connected with negative electrode conductive copper foils of the lamp strip units through a plurality of negative electrode connecting wires. And the negative electrode conductive wire is connected with the negative electrode conductive copper foil of the lamp strip unit through a plurality of negative electrode connecting wires. The LED lamp strip is simple in structure, the positive electrode conductor wire and the negative electrode conductor wire support the lamp strip, bending and folding are not prone to breakage, voltage drop is greatly reduced, voltage and current are stable, illumination brightness is stable, long-distance light attenuation is small, the display effect of the lamp strip is good, a multi-party parallel connection technology is adopted, and multi-party power supply, two-position power supply, three-position power supply or multi-position power supply and branch power supply are formed; and a copper wire and welding parallel power supply are adopted, so that the illumination stability is ensured, the installation and the maintenance are convenient in a severe environment, and the use effect of a consumer is good.

The complex water environment multi-wavelength laser attenuation simulation system comprises a multi-wavelength laser emission module, a water body environment simulation module, a light splitting module and a power detection module. Seawater characteristics such as temperature, salinity and turbulence intensity of a water body are accurately controlled, parameters such as turbidity of the water body are changed by adding suspended particles such as diatomite and calcium carbonate, and high-precision simulation and measurement of laser attenuation characteristics in different underwater environments are realized by combining a multi-wavelength laser radar technology. According to the multi-wavelength underwater test system, through difference analysis among multiple wavelengths, environment simulation of laser detection capability and substance identification in different water body environments such as turbulent flow and quantitative influence among multi-wavelength laser can be effectively simulated; more comprehensive transmission characteristic experiment test verification and capability simulation under multi-wavelength laser are provided for underwater target identification, marine environment monitoring, resource exploration and other applications, and the multi-wavelength marine detection potential of future laser is expected to be improved.

The utility model discloses a Vmux optical multiplexing device supporting multiple application scenes, which realizes comprehensive monitoring and flexible control of optical signal transmission by integrating photoelectric detection, variable optical attenuation, an optical switch and a master control and wave combining and demultiplexing module, monitors optical power in real time through a photoelectric detection module, ensures that the master control module quickly acquires the state of an optical path, and realizes the purpose of realizing the optical multiplexing of multiple application scenes. Main and standby links are intelligently switched to guarantee stable transmission, optical power is dynamically adjusted through the variable optical attenuation module, saturation or signal distortion of a receiving end is avoided, the applicability and flexibility of equipment are improved, efficient wave combination is performed through the wave combination and demodulation module, optical fiber resources are saved, multi-channel optical signals are output through wave demodulation, and diversified requirements are met. The overall design ensures that sudden faults can be quickly responded in a complex network environment, continuous and stable optical signal transmission is ensured, and the reliability and the stability of the device are greatly improved.

The utility model discloses a phase change type LED (light-emitting diode) explosion-proof lamp, which belongs to the technical field of explosion-proof lamps and comprises a lamp main body, a phase change cavity is arranged in the lamp main body, heat dissipation liquid is filled in the phase change cavity, a light source plate is arranged on the outer side of the phase change cavity, the lamp main body comprises a heat dissipation section and a heating section, the light source plate is arranged at the position of the heating section, and the heat dissipation section is arranged on the heat dissipation section. And a liquid absorbing core is arranged in the phase change cavity. The sealed phase change cavity is designed in the explosion-proof lamp, a certain amount of working fluid is filled in the phase change cavity, the light source plate is attached to the outer side of the lower end of the phase change cavity, and the dense liquid absorption cores are designed in the phase change cavity, so that the whole lamp becomes a phase change heat pipe, the heat conduction efficiency of the shell is improved, the power density of the lamp is increased, and the service life of lamp beads is prolonged; and light attenuation is reduced.

The ultra-thin module comprises a light guide plate, first light source assemblies for illuminating the light guide plate are arranged on the two sides of the light guide plate; the second light source assembly is arranged on one end face of the light guide plate, the side wall of the second light source assembly is provided with a light guide line, and the lower surface of the light guide plate protrudes downwards to form a protruding block matched with the light guide line so as to supplement a light source to the middle of the light guide plate; the first reflecting film is fixed on the lower surface of the light guide plate to reflect light to a preset direction; a rubber frame; through the arrangement of the light guide wire, the convex block, the second mounting block, the second light source and the second light guide piece, the device can well reduce the condition of low brightness of a backlight center caused by light attenuation under the condition that the display screen is thin, so that the light supplementing effect is achieved, and in the later use process, the brightness of the display screen is improved. The brightness of the center and the edge of the display screen can be controlled to be switched on and off respectively, and energy consumption is reduced.