1224 results about "Signal light" patented technology

The invention provides an optical system, a control method, a vehicle optical signal device, a vehicle lamp and a vehicle, the optical system comprises at least one first light source assembly and a second light source assembly, and light emitted by the first light source assembly passes through an optical assembly and is emitted from a first light emitting area of a light emitting surface of the optical assembly; light emitted by the second light source assembly passes through the optical assembly and is emitted from a second light-emitting area of the light-emitting surface of the optical assembly, and at least partial area overlapping exists between the first light-emitting area and the second light-emitting area; wherein light emitted by the first light emitting area serves as a first light function, light emitted by the second light emitting area serves as a second light function, the first light function serves as a marker lamp of the driving automation system, and the second light function serves as other light functions with colors different from those of the first light function. Therefore, the structure and function multiplexing of the automatic system marker lamp and other signal lamps is realized, the cost of independently designing and manufacturing the automatic system marker lamp is effectively reduced, and the occupied space of the whole vehicle lamp is effectively reduced.

The invention discloses a molten steel element content on-line detection system based on a laser-induced breakdown spectroscopy technology, and relates to the technical field of molten steel element content on-line detection, the molten steel element content on-line detection system comprises an excitation system, an acquisition system, a data preprocessing module and a component detection module; the excitation system is used for emitting laser to the molten steel surface to generate plasma; the acquisition system is used for collecting signal light radiated by the plasma; the data preprocessing module is used for carrying out baseline correction and noise reduction processing on the collected original spectral signals; and the component detection module comprises an element content prediction model based on a gating specific expert attention network LSEA-Net and is used for carrying out quantitative analysis on the preprocessed spectral data to obtain the element content of the molten steel. The technology has the advantages that sample preparation is not needed, online rapid analysis and multi-element synchronous detection are achieved, and the technology is suitable for the high-temperature environment and the like, and the requirement of a steelmaking site for real-time component detection is met very well.

The invention relates to the technical field of VR panoramic road safety illegal behavior snapshot scheme design, in particular to a VR panoramic road safety illegal behavior snapshot method and system. The method comprises the following steps: acquiring an intersection panoramic video stream through a single panoramic device; illegal evidence obtaining is triggered based on space overlapping of the vehicle track and the electronic fence; synchronously judging a red light running behavior by combining a signal lamp state; identifying retrograde motion by comparing the motion vector with the lane direction vector; all-weather overspeed monitoring is realized by using a millimeter wave radar; and generating an evidence packet containing the two-dimensional panorama and the three-dimensional reconstruction model. The system is composed of a panoramic acquisition module, an electronic fence module, a behavior analysis module, an illegal evidence obtaining module and a data communication module. The method has the core advantages that all-intersection coverage is achieved through single equipment, the illegal recognition accuracy is improved through multi-source data fusion, the evidence effectiveness is enhanced through the three-dimensional reconstruction technology, and the law enforcement cost and the dispute risk are remarkably reduced.

The invention provides a mixed traffic cooperative control method based on multi-agent reinforcement learning, which can be applied to the technical field of intelligent traffic and automatic driving. The method comprises the following steps: inputting first state information of a target intersection and second state information of an adjacent intersection into a signal lamp intelligent body obtained based on public traffic priority target training, and outputting a signal lamp phase control action; inputting the signal lamp information and the automatic driving vehicle information of the automatic driving vehicle at the target intersection into a signal lamp fine-tuning intelligent body obtained based on safety target training, and outputting a signal lamp fine-tuning control action; inputting the signal lamp information, the automatic driving vehicle information and the front vehicle driving information into an automatic driving vehicle intelligent body obtained based on safety efficiency cooperative target training, and outputting an automatic driving vehicle driving action; and under the condition that the first signal lamp is controlled to execute the signal lamp phase control action and the signal lamp fine adjustment control action, the automatic driving vehicle is controlled to execute the driving action of the automatic driving vehicle.

An optical path testing device and an optical path testing method divide output light from a laser light source into a probe optical path and a local optical path and convert modulated light obtained by modulating input light of the probe optical path into probe light including pulsed light, generate a beat signal by causing signal light and input light of the local optical path to interfere with each other, acquire a signal indicating backscattered light in the optical fiber on the basis of the beat signal, and analyzes a loss distribution, generate the modulated light by performing, on the output light, modulation based on a frequency changing from a start frequency to an end frequency, generate an analysis signal by averaging the backscattered light in each different frequency band included in the beat signal between the different frequency bands and acquire the loss distribution.

The invention provides a ramp traffic signal adaptive control method and system based on unmanned aerial vehicle cooperation, and belongs to the technical field of intelligent traffic control, and the method comprises the steps: collecting traffic data in real time based on an unmanned aerial vehicle cluster dynamically deployed over a ramp, constructing a global traffic state matrix, and carrying out the initial processing through edge calculation; carrying out edge calculation on the primarily processed data by utilizing an edge node to generate a local optimal signal timing suggestion in real time; the local optimal signal timing suggestions uploaded by the multiple unmanned aerial vehicles are integrated at the cloud, and a global optimal signal timing strategy is generated through unified training; signal lamp parameters are adjusted in real time on the basis of a global optimal signal timing strategy, the direct intervention capability on site traffic is enhanced through an air guiding function, and a high-reliability solution is provided for an intelligent traffic system.

Techniques are described herein for determining whether a traffic light signal is flashing. The technique comprises collating data representing a time-ordered sequence of classifications indicative of a likelihood that a traffic light signal is active at respective times, thereby to create collated data. output data is generated, based on the collated data, using a convolutional neural network (CNN) arranged to provide an indication of a likelihood that a traffic light signal is flashing based on an input time-ordered sequence of classifications. It is then determined whether the traffic light signal is flashing based on the output data.

The invention discloses a trajectory planning model training method and device, equipment and a storage medium, and relates to the technical field of computers. The method comprises the steps of obtaining pre-training sample data; the pre-training sample data comprises driving track data of a driver; performing iterative training processing on a to-be-trained pre-training model based on the pre-training sample data to obtain a hidden variable embedding layer and a decoder in the trained pre-training model; constructing a trajectory planning model to be trained based on the feature encoder, the strategy network, the evaluation network, the hidden variable embedding layer and the decoder; obtaining training sample data, wherein the training sample data comprises sample vehicle driving data, sample obstacle data, sample map data, sample signal lamp data and sample navigation path data; and based on the training sample data, performing reinforcement learning training processing on the to-be-trained trajectory planning model to obtain a trained trajectory planning model.

The invention discloses a traffic jam detection and early warning method based on an unmanned aerial vehicle video stream, and belongs to the technical field of intelligent traffic. The system is combined with a floating vehicle triggering model, collects road videos in real time through an unmanned aerial vehicle, and realizes high-precision vehicle detection and tracking in combination with improved YOLOv8 and DeepSort algorithms; unmanned aerial vehicle data and floating vehicle GPS data are fused, three elements of traffic flow are quantified, and a dual-mechanism congestion detection model is constructed; respectively utilizing a GRU cooperative traffic wave theory to predict the congestion dissipation duration and utilizing an improved GRU + GCN model to predict the traffic situation; the signal lamps are dynamically regulated and controlled through multi-agent reinforcement learning, and active congestion relieving is achieved. The method has the advantages of wide-area coverage, high-precision perception and intelligent response, and the urban traffic control efficiency is remarkably improved.

The invention discloses a conflict avoidance analysis method based on enhanced retrieval, and belongs to the field of conflict avoidance analysis, and the method comprises the steps: collecting real-time traffic information through data sources such as traffic flow tracks and signal lamp states, carrying out the time-space coordinate marking, and obtaining a marked multi-source data set; according to the labeled multi-source data set, a space-time self-correlation algorithm is adopted to calculate association strength between events, and a dynamic association sequence of the events is determined; performing density clustering on the event points by applying a DBSCAN algorithm aiming at the conflict propagation path set, and determining a preliminary geometric boundary of a conflict region; an aggregation intensity value is calculated according to the number and frequency of events in the preliminary geometric boundary, and a quantized aggregation intensity distribution diagram is obtained; if the quantized aggregation intensity distribution diagram shows that the boundaries are overlapped, adjusting boundary lines through intensity gradient analysis in the distribution diagram to obtain accurate geometric boundary description; and predicting a future evolution trend by combining accurate geometric boundary description with a dynamic correlation sequence, and judging a conflict evolution path.

The invention provides a gradient induction control method. The method comprises the steps of obtaining traffic flow data of a target intersection at a current moment and operation data of a corresponding traffic signal lamp; according to the running duration of the target stage and the corresponding relation between the different running duration intervals of the lamp sets in the preset target stage and the vehicle number threshold values, gradient vehicle number threshold values corresponding to the lamp sets at present in the target stage are determined; according to the operation data, the traffic flow data and a gradient vehicle number threshold value, determining a stage vehicle state value and a stage pedestrian state value of the target stage at the current moment; according to the stage vehicle state value and the stage pedestrian state value of the target stage at the current moment, determining a stage signal value of the target stage at the current moment; determining a stage decision value of the target stage at the current moment according to the stage signal value of the target stage at the current moment; and according to the stage decision value of the target stage at the current moment, generating a control instruction for controlling the traffic signal lamp of the target intersection.

The invention provides a single-port input / output multi-state adjustable waveguide mode converter and a preparation method thereof, and belongs to the technical field of on-chip silicon-based polymer hybrid integrated waveguide mode converters. According to the invention, a double-layer MZI parallel combination structure is adopted, independent electrodes are configured at specific positions of interference arms, and corresponding modulation signals are applied, so that accurate regulation and control of an input light field are realized. When E00-mode signal light is input, the structure can dynamically realize the conversion function of three modes of E00 / E01 / E10 on the premise of keeping single-port output, and the mode conversion efficiency reaches 95%. And the device is compatible with a standard silicon-based CMOS (Complementary Metal-Oxide-Semiconductor Transistor) process, is beneficial to reducing the manufacturing cost and promoting large-scale integrated application, is suitable for the fields of a high-capacity mode division multiplexing system and multi-dimensional optical signal processing, and can meet the urgent requirements of modern optical communication on high-integration-level, reconfigurable operation and low-cost devices.

The invention discloses a non-linear frequency conversion regenerative amplification device and a method thereof, and belongs to the technical field of laser non-linear frequency conversion. The device comprises a signal light injection unit, a regeneration amplification cavity unit and a pump light synchronization unit. The regenerative amplification cavity unit comprises an optical resonant cavity structure module, a polarization control module and a nonlinear action module. A time domain switch is formed through the polarization control module under the driving of the time schedule controller, and the preset number of times of circulation of signal light in the cavity is accurately controlled. And meanwhile, the pump light synchronization unit generates pump pulse string laser which is synchronous with the circulation process and has sub-pulse power increasing in sequence, so that the signal light and one corresponding pump sub-pulse are subjected to optical parametric amplification in the nonlinear crystal in each circulation. The space complexity of multi-stage amplification is converted into time domain controllability, high-efficiency and high-gain nonlinear frequency conversion is realized by using a single-stage compact structure, and the integration level and the stability of the system are remarkably improved.

The invention relates to the field of intelligent traffic and vehicle-road cooperation, in particular to a traffic operation double-control intelligent system. Comprising a multi-mode roadside sensing module used for obtaining traffic operation state data and environment state data of a road section; the double-control cooperation unit is used for jointly generating variable speed limit setting and signal control adjustment quantity based on the traffic operation state data and the environment state data; the signal control module is used for carrying out on-line adjustment on intersection phase timing or trunk line phase difference according to the signal control adjustment amount; the road information broadcasting module is used for broadcasting road information to the vehicle; the consistency verification module is used for carrying out consistency comparison on the road information, the actual signal lamp state and the phase remaining time; and the safety domain management module is used for applying double-hysteresis safety domain constraint to the variable speed limit setting and the signal control adjustment amount. According to the invention, the cooperation of two links is realized, the vibration suppression steady state is consistent with the release, and the driving behavior is stably and verifiably guided.

An optical computing device includes an optical computing section including a first transmissive optical modulation element having cells each having an independently set phase modulation amount. The first transmissive optical modulation element emits a signal light, in a signal direction, generated when transmitted light beams phase-modulated by the cells interfere with each other and a noise light, in a noise direction, transmitted through the first transmissive optical modulation element without being phase-modulated by the cells. The optical computing device includes an optical sensor that detects the signal light outputted from the optical computing section and generates an electrical signal indicating a result of the detection. The first transmissive optical modulation element is configured such that an impact that the noise light has on the electrical signal is smaller than the impact in a state where the signal direction aligns with the noise direction.

The invention discloses an anti-fatigue driving signal lamp and atmosphere lamp control method and a vehicle, and relates to the technical field of vehicle intelligent auxiliary driving and active safety, and the method comprises the steps: collecting a cab video stream, and positioning face key points after image preprocessing; calculating an eye PERCLOS index and a mouth yawning frequency, and dynamically adjusting a weight based on a face angle so as to fuse and calculate a comprehensive fatigue index; carrying out grading judgment on the index by utilizing a hysteresis interval containing a starting threshold value and a reset threshold value, and reducing a judgment threshold value in real time by utilizing a linear model according to the vehicle speed; and driving an indoor atmosphere lamp to execute a breathing or stroboscopic mode according to the judged sober, mild or severe fatigue grade, controlling an outdoor signal lamp and a road surface projection assembly to execute corresponding warning actions, and performing reverse pre-distortion processing on a projected image. According to the invention, through multi-source feature fusion, hysteresis threshold determination and vehicle speed correction mechanisms, the stability of fatigue monitoring and the accuracy of warning are improved.

The invention provides an intelligent traffic scheduling method and system based on multi-modal fusion and space-time prediction, and relates to the technical field of intelligent traffic scheduling, and the method comprises the steps: collecting traffic-related multi-modal data; performing preprocessing and data-level and feature-level fusion processing on the multi-modal data to generate a fusion feature matrix; constructing an STGCN-LSTM space-time prediction model according to the fusion feature matrix, and predicting the traffic flow and queuing length of each entrance lane of the current scene to obtain a prediction result; and dynamically optimizing a signal lamp timing scheme according to the prediction result and the real-time traffic state. By accurately sensing a real-time traffic state, predicting a traffic flow change trend in a short time in the future and dynamically adjusting an intersection signal lamp timing scheme, on-demand timing is realized, the average waiting time of vehicles is shortened, the queuing length at an intersection is reduced, the traffic efficiency at the intersection is improved, and meanwhile, the traffic demands of pedestrians and non-motor vehicles are considered; and the safety and smoothness of traffic operation are ensured.

The invention provides a C + L wave band optical fiber amplification module and an optical fiber laser. The C + L wave band optical fiber amplification module comprises a first bidirectional pumping unit, a gain flattening filter, a variable optical attenuator and a second bidirectional pumping unit, a first gain optical fiber of the first bidirectional pumping unit adopts a three-section splicing structure formed by sequentially welding a first bismuth-doped optical fiber, an erbium-doped optical fiber and a second bismuth-doped optical fiber along a signal transmission direction, and a second gain optical fiber of the second bidirectional pumping unit is a bismuth-erbium co-doped optical fiber; wherein the first bidirectional pumping unit is used for performing primary amplification on C + L wave band seed light to generate first signal light; and the second bidirectional pumping unit is used for performing secondary amplification on the adjusted first signal light to generate second signal light. According to the invention, low-noise, high-gain and high-flatness C + L wave band amplification signals can be output.

A pump light generation unit of an optical amplifier pumping device outputs pump light with a single wavelength or a plurality of wavelengths from a plurality of output ports. A pump light multiplexing unit polarization-multiplexes or wavelength-multiplexes the plurality of pieces of pump light which has been output from the pump light generation unit. A polarization scrambler collectively polarization-scrambles the polarization-multiplexed or wavelength-multiplexed pump light which has been output from the pump light multiplexing unit and outputs the polarization-scrambled pump light to an optical waveguide for pump light. The optical waveguide for pump light inputs the pump light which has been polarization-multiplexed or wavelength-multiplexed by the pump light multiplexing unit to the pump light superimposition unit. A pump light superimposition unit multiplexes the polarization-multiplexed or wavelength-multiplexed pump light and signal light. A pump light output port superimposes the pump light on the signal light by outputting the pump light from the pump light superimposition unit to the gain medium so that the pump light propagates in the same direction as the signal light.

The application provides a nonlinear optical effect generation method, relates to the field of optoelectronic technology, and comprises the following steps: fixing and placing a polar ion crystal as a nonlinear medium, the polar ion crystal being a diatomic crystal or a polyatomic crystal with an optical phonon mode; using a modulated terahertz wave to excite a stimulated phonon polariton in the nonlinear medium, so as to enhance the nonlinear efficiency of signal light incident on the nonlinear medium; and adjusting the polarization angle and the incident angle of the signal light and / or the modulated terahertz wave, so as to generate a nonlinear optical effect. The application is based on the characteristics of the interaction between light and matter modulated by the stimulated phonon polariton, and the nonlinear polarizability is greatly improved by using the stimulated phonon polariton, so that the weak light nonlinear effect of most wavelengths of light can be realized efficiently; and the nonlinear optical effect has the advantages of high refresh rate, wide spectral response, low threshold and low power consumption.

1. Name of the designed product: multifunctional electric vehicle rear signal lamp. 2. Use of the designed product: electric vehicle signal lamp. 3. Design points of the designed product: shape. 4. Picture or photo best showing the design points: perspective view 1.

1. The name of the design product: brake light (DF8-A). 2. The use of the design product: brake light, signal light for vehicles such as cars, motorcycles, electric vehicles, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: Design 1 perspective view 1. 5. Design 1 is designated as the basic design.

Intensity control units 40A and 40B acquire the intensity of backscattered light when inputting signal light of two or more modes for each core in a multicore optical fiber 10, which has two or more cores and in which two or more modes propagate to each of the cores, so that the transmission direction of light differs between adjacent cores, and output a control signal for reducing the input optical power of a high-order mode other than a basic mode of the signal light by a predetermined amount so as to reduce the influence of the high-order mode on the basic mode.

The application discloses a phase-sensitive pre-amplification method based on an electro-absorption modulated laser, and is applied to a star-ground laser communication system receiving end. A distributed feedback laser in the electro-absorption modulated laser amplifies weak pump light after long distance transmission, and generates idler light under the nonlinear effect of a laser cavity; an electro-absorption modulator in the electro-absorption modulated laser detects phase error information between signal light, pump light and idler light, and constructs an optical injection phase-locked loop through a feedback loop, so that stable control of the three-wave phase relationship is realized. Under the phase stability condition, the output light of the electro-absorption modulated laser is fed into a later-stage nonlinear medium to complete phase-sensitive pre-amplification. The phase-sensitive pre-amplification method based on the electro-absorption modulated laser has the advantages of simple structure and easy integration, can realize pump light amplification, idler light generation and phase error suppression under the condition of weak pump light, and effectively improves the receiving sensitivity performance of the star-ground laser communication system.

1. Name of the product in this design: Automotive turn signal light source (Series II). 2. Purpose of this product design: To be installed on automobiles for turn signal warning lighting. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 front view. 5. Design 1 is designated as the basic design.

This application discloses an optical parametric oscillator and a laser generating device, relating to the field of laser technology. The optical parametric oscillator includes a first optical fiber, a mirror assembly, a nonlinear crystal, and a second optical fiber. The first optical fiber has a first receiving end and a first output end. The first receiving end is used to receive pump light. The second optical fiber has a second receiving end and a second output end. Light output from the first output end can be transmitted to the second receiving end via the mirror assembly and the nonlinear crystal. The second output end is used to output signal light. The mirror assembly includes multiple mirrors. The nonlinear crystal is located in the optical path between two mirrors. A first grating is disposed on the first optical fiber, and a second grating is disposed on the second optical fiber. Both the first and second gratings are fiber Bragg gratings. Because this application uses a first optical fiber and a second optical fiber to define the light transmission path, compared to a free-space optical path, the optical fiber can be coiled, which is beneficial for reducing the overall size and improving integration.

The utility model discloses a feedback module and a signal lamp, and belongs to the technical field of signal lamps. The input end of the adjustable constant current source is electrically connected with the output end of the signal input unit; the light emitting unit is electrically connected with the output end of the adjustable constant current source; the single chip microcomputer is electrically connected with the output end of the signal input unit through an optocoupler detection unit; and the communication unit is in communication connection with the single chip microcomputer. The single-chip microcomputer is connected with the optocoupler detection unit electrically connected with the output end of the signal input unit, so that the single-chip microcomputer obtains the state information of the signal lamp, the communication unit communicates with the traffic command center, and the problem that the traffic command center is difficult to receive the state information of the signal lamp in real time is solved.

A laser ranging method and device using the autocorrelation characteristics of light intensity random noise, the method comprising: step S1, a wide spectrum light source emits laser light, which is divided into a first light beam and a second light beam by a ranging probe, and the first light beam is defined as a reference light beam; step S2, the second light beam is emitted to a target object to be measured, and a light beam reflected by the target object to be measured is obtained and defined as a signal light beam; step S3, the reference light beam and the signal light beam are coupled to form a coupled light beam; and step S4, the coupled light beam is processed to obtain absolute distance information of the target object to be measured to the light emitting end surface of the probe. The device obtains absolute distance information of the target object to be measured based on light source intensity noise. The present application has the advantages of high time resolution and high precision measurement.

The invention discloses a traffic light fault real-time identification and alarm method based on improved Yolov5, and relates to the technical field of intelligent traffic, and the method comprises the steps: S1, building a traffic light fault data set in advance, and collecting traffic light images and video data under different scenes, illumination conditions and weathers; step S2, constructing an improved Yolov5 model; and S3, extracting images of a real-time video stream to be detected according to frames, inputting the images into the trained improved Yolov5 model, outputting position information, light color states and fault probabilities of traffic lights, and analyzing and judging fault types in combination with a preset threshold value and a multi-frame time sequence. Real-time video stream processing and multi-frame time sequence analysis are combined, the high-frame-rate real-time detection requirement can be met, time sequence faults can be accurately judged, and the limitation that manual inspection is low in efficiency and poor in real-time performance is broken through; the fault response and handling period is greatly shortened, and powerful technical support is provided for guaranteeing normal operation of the traffic lights and improving urban traffic management efficiency.