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57 results about "Variable-message sign" patented technology
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A variable- (also changeable-, electronic-, or dynamic-) message sign, often abbreviated VMS, CMS, or DMS, and in the UK known as a matrix sign, is an electronic traffic sign often used on roadways to give travellers information about special events. Such signs warn of traffic congestion, accidents, incidents such as terrorist attacks, AMBER/Silver/Blue Alerts, roadwork zones, or speed limits on a specific highway segment. In urban areas, VMS are used within parking guidance and information systems to guide drivers to available car parking spaces. They may also ask vehicles to take alternative routes, limit travel speed, warn of duration and location of the incidents, or just inform of the traffic conditions.
Non-scene law enforcement high-speed dynamic weighing detection system and method
InactiveCN106530737ARealize automatic separationQuick identificationArrangements for variable traffic instructionsSpecial purpose weighing apparatusSoftware systemVariable-message sign
The invention discloses a non-scene law enforcement high-speed dynamic weighing detection system and method, and belongs to the field of traffic control. The system comprises a dynamic weighing system, a vehicle license plate recognition system, a variable message sign display system, an opposite-direction driving snapshot system and an upper computer software system. The dynamic weighing system, the vehicle license plate recognition system and the opposite-direction driving snapshot system are in signal connection with the upper computer software system; and the output end of the upper computer software system is connected with the input end of the variable message sign display system. Each vehicle is allowed to form a piece of complete vehicle pass information, comprising vehicle speed, axle load, number of axles, axle base, complete vehicle weight, license plate, speed, pass time and information about whether a vehicle overloads; if the vehicle overloads, a reminding message is sent to the variable message sign display system according to user setting to guide the vehicle to pull in to recheck; and meanwhile, the vehicle license plate information and weight information are displayed on a variable message sign, and are updated to a branch center database, thereby facilitating searching, sharing and analysis of vehicle pass records.
Owner:郑州海为电子科技有限公司
Changeable message sign structure
Owner:LEDSTAR
Traffic signal device for driver/pedestrian/cyclist advisory message screen at signalized intersections
ActiveUS20150154860A1Avoid distractionsLight colorControl with pedestrian guidance indicatorVariable-message signComputer science
An encrypted traffic signal device controller (TSDC) and an Electronic Variable Message Sign (EVMS) at intersection roadways and related traffic intersections where the invention system is installed at traffic light intersections which will be triggered at the red light sequence where vehicles / pedestrian / cyclists are stopped. After the traffic light turns red, the time delay of the red light will trigger an audio and visual public announcement which will be of assistance to the driver and enable the driver to pay attention to the announcement without being concerned about diverting the driver's attention from driving the vehicle since the vehicle is stopped at a red light and the driver can devote his attention to reading the information provided.
Owner:HOLZMAC
High speed variable speed limit control method based on adverse weather conditions
ActiveCN102568226AOvercoming adjustmentOvercome deficienciesArrangements for variable traffic instructionsDriver/operatorEngineering
The invention relates to a high speed variable speed limit control method based on adverse weather conditions. According to real-time change of weather conditions, speed limit values under various weather conditions are automatically adjusted, and speed limit information is issued to a driver by virtue of a variable message sign, thus traffic accident probability is reduced and road traffic safety is improved. In the high speed variable speed-limit control method provided by the invention, real-time weather characteristic parameters are acquired by utilizing meteorological environment testing equipment, speed limit value of a road is automatically adjusted according to various weather conditions, and the defect that the traditional speed limit value of the road is constant can be overcome. The high speed variable speed limit control method has practical engineering application value in the aspects of high speed road traffic management and control according to the adverse weather conditions.
Owner:SOUTHEAST UNIV
Radio frequency identification (RFID)-technology-based ship lockage management system and method thereof
InactiveCN102723002AGuaranteed legalityEnsure speedTicket-issuing apparatusCo-operative working arrangementsSoftware systemData acquisition
The invention discloses a radio frequency identification (RFID)-technology-based ship lockage management system and an RFID-technology-based ship lockage management method, and belongs to the field of ship lockage management. An electronic communication technology, a computer technology and a network technology are adopted. The system is characterized by comprising a hardware system and a software system. The hardware system consists of an RFID electronic tag, an RFID reader-writer, a mobile phone of a boatman, a short message server, a light-emitting diode (LED) variable message sign, a client computer and a system server. The software system consists of a reader-writer management subsystem, an electronic tag management subsystem, a ship lockage management subsystem and a user management subsystem. The system and the method have the advantages that ship information can be automatically acquired, the identity of a ship can be automatically verified twice, and the lockage scheduling and automatic payment of the ship can be realized to ensure the navigation information data acquisition speed and accuracy of an operated ship, ensure the legality of the ship and ensure that a management department timely and accurately masters the condition of a navigation channel and the lockage condition of the channel and acquires decision aid information.
Owner:SHANGHAI MARITIME UNIVERSITY
Intelligent highway mist zone guiding system
InactiveCN105913662ALow costAvoid traffic accidentsArrangements for variable traffic instructionsDetection of traffic movementLow speedVehicle detector
The invention discloses an intelligent highway mist zone guiding system and belongs to the technical field of road traffic safety. The intelligent highway mist zone guiding system comprises a front end node controller, a variable message sign, a speed limit sign, a vehicle flowrate detector, a node controller, visibility detection controllers, cameras, guiding node controllers, vehicle detectors, alarm devices and induction lamps. According to the intelligent highway mist zone guiding system, expensive visibility detectors are replaced with the cameras which are arranged at a certain interval in an agglomerate fog-prone zone, ultrahigh frequency radio frequency identification technologies are used for detecting a vehicle flowrate and vehicle positions, vehicles are prompted to keep a low speed and a safe interval via an acousto-optic alarm mode when vehicle-to-vehicle distance is too small, traffic accidents can be effectively prevented, Zigbee short range wireless information transmission technologies are adopted, workload of on-site system construction can be reduced, and system cost can be lowered. Via use of the intelligent highway mist zone guiding system, safety of vehicles running in conditions of low visibility weather, and traffic accidents can be effectively prevented.
Owner:SHANDONG JIAOTONG UNIV
Method and system for automatically generating urban road traffic guidance strategy
InactiveCN103699775AScience Induction StrategiesReasonable induction strategyArrangements for variable traffic instructionsSpecial data processing applicationsSimulationTraffic flow
The invention relates to a method and a system for automatically generating an urban road traffic guidance strategy. According to the method and the system, by applying the intelligent traffic theory, the spatial autocorrelation theory, the fuzzy mathematic theory, an statistical method and the computer technology, real-time traffic flow data and historical data are researched and processed, and therefore, under the condition that a traffic incident occurs in a road traffic network, the traffic guidance strategy which can be released in time through VMS (variable message signs) on a road is automatically generated. According to the method and the system, by taking historical artificial guidance information and the real-time traffic flow data as input data, on the basis that historical guidance empirical laws are analyzed and real-time traffic flow features are excavated, a final guidance release strategy is determined by applying a traffic state spatial inequality analysis method provided by the invention. A proposal and strategy scheme can be provided for the quick release of the guidance information of an urban traffic management department when certain traffic incidents occur, such as road accidents, congestion, severe weather, management and control, and the like.
Owner:BEIJING JIAOTONG UNIV
Variable message sign (VMS) coordination control method and system under information guidance
InactiveCN107437339AEfficient analysisArrangements for variable traffic instructionsSpecial data processing applicationsTransfer modelControl system
The invention discloses a variable message sign coordination control method under information guidance. The method comprises the following steps: S1, the traffic information parameter values in a regional road network are acquired; S2, a hidden Markov model is used to build a transfer model for the traffic flow state in the regional road network; S3, an EM algorithm is adopted to solve the built hidden Markov model, and the road network traffic state information is obtained; S4, traffic guidance information is generated according to the road network traffic state information; S5, the traffic guidance information is published through the variable message sign; and S6, the published traffic information influences the traffic flow state of the road network. The invention also discloses a variable message sign coordination control system under message guidance by using the method. The system uses a dynamic influence transfer model to simulate changes of the state of the road network at the next moment, an influence matrix is solved statistically according to historical data, the state of adjacent roads under the current event is estimated, reasonable information is published through the adjacent VMSs to guide traveling.
Owner:BEIJING JIAOTONG UNIV
Variable message sign application system, electronic navigation method and device thereof
ActiveCN102693642AImprove operational safetyEase traffic congestionRoad vehicles traffic controlVariable-message signMarine navigation
The embodiment of the invention provides a variable message sign (VMS) application system, an electronic navigation method and a device thereof. The electronic navigation method comprises the following steps of: acquiring VMS information and an identification number of a VMS, wherein the VMS information comprises VMS dynamic information content and a VMS lane information classification code; according to the identification number of the VMS and the VMS information classification code, matching and searching a corresponding traffic regulation identification number; according to the traffic regulation identification number, matching and searching corresponding traffic regulation information; and carrying out navigation application according to the traffic regulation information. According to the embodiment of the invention, dynamic road information can be obtained by the electronic navigation device in real time, thus driving is guided by the electronic navigation device more effectively.
Owner:NAVINFO
Variable message sign information release method of prediction model
ActiveCN105303856AOvercome limitationsRational Path DecisionArrangements for variable traffic instructionsForecastingTraffic predictionHabit
The invention discloses a variable message sign information release method of a prediction model, and belongs to the technical field of urban public transport management. The method comprises the steps that a multi-range travel time prediction model and a road network dynamic division method based on prediction time range are combined by utilizing statistical inference and machine learning methods on the basis of real road traffic data, and a dynamic and hierarchical traffic prediction model is established through combination of an urban road network structure and the characteristics of public guiding equipment; and information releasing is performed according to the characteristics of a variable message sign. The method has characteristics of hierarchy and refinement, and guiding information meeting the driving behaviors and decision habits is provided from the perspective of drivers through combination of the road network structure by aiming at the characteristics of the variable message sign so that the drivers can be assisted in passing through a guiding board to acquire the future traffic condition of a target road segment when actually arriving the target road segment and then make more reasonable path decisions, and thus the overall traffic condition of the road network near the guiding board can be improved.
Owner:TSINGHUA UNIV
Traffic signal device for driver/pedestrian/cyclist advisory message screen at signalized intersections
InactiveUS20160005311A1Avoid distractionsLight colorControl with pedestrian guidance indicatorVariable-message signComputer science
Owner:HOLZMAC
Expressway programmable logic controller (PLC) tunnel monitoring system
InactiveCN103197645AManual priorityManual control, manual operation priorityProgramme total factory controlVariable-message signProgrammable logic controller
The invention relates to an expressway programmable logic controller (PLC) tunnel monitoring system which comprises a variable message sign, a lane indicator, illumination equipment, a fan, a master PLC and a plurality of site PLCs. An expressway tunnel left cave and an expressway tunnel right cave are respectively provided with an optical fiber redundancy token looped network. Two optical fiber redundancy token looped networks are independent of each other. The variable message sign, the lane indicator, the illumination equipment and the fan are respectively connected with a site PLC. Each site PLC is connected with a monitoring computer in a signal mode through the master PLC. The master PLC and the plurality of site PLCs are connected in the optical fiber redundancy token looped networks. According to the expressway PLC tunnel monitoring system, an integrated scheme which combines a tunnel PLC and a central control computer is adopted in an expressway tunnel swarm intelligence automatic system, decentralized control and centralized management are carried out on electromechanical devices of an expressway tunnel, meanwhile, monitoring is carried out on the internal environment of a cave of the expressway tunnel, the external environment of the cave of the expressway tunnel and the electromechanical devices, not only are control requirements of the expressway tunnel to traffic, illumination and ventilation inside the cave of the expressway tunnel satisfied, but also the purposes of coordination of comprehensive monitoring on the whole expressway PLC tunnel monitoring system and energy saving are achieved.
Owner:KUNMING UNIONSCIENCE TECH CO LTD
Method and device for detecting variable-message signs
A method for detecting variable message traffic signs for a vehicle, includes: reading in a vehicle position, comparing the vehicle position to position information of at least one variable message traffic sign in order to determine a presence of a variable message traffic sign in a predefined area around the vehicle and in response to provide a proximity information, and varying a detection instruction of information of a variable message traffic sign in response to the proximity information to detect a variable message traffic sign.
Owner:ROBERT BOSCH GMBH
High-brightness traffic variable message sign and implementation method thereof
ActiveCN103050063AGood fog penetrationExtend your lifeArrangements for variable traffic instructionsIdentification meansControl signalEngineering
The invention provides a high-brightness traffic variable message sign and an implementation method thereof. The message sign comprises a traffic message display panel, a laser diode array, a power system, a light-emitting control system and a communication module, the laser diode array is composed of a plurality of laser diodes, emergent ends of the laser diodes are connected to preset light-emitting point positions on the traffic message display panel respectively through optical fibers, and the light-emitting control system acquires traffic information needing to be displayed through the communication module, outputs a control signal to the power system and respectively supplies power to the laser diodes. The high-brightness traffic variable message sign enables a power supply to be not directly exposed and is small in impact of outdoor temperature variation, thereby being longer in service life. Besides, the high-brightness traffic variable message sign is good in waterproofness, free of aging and soaking, concentrated in light beams, good in haze-penetrating property, high in system brightness, low in power consumption and capable of effectively displaying the traffic information under low-visibility conditions.
Owner:西安和其光电科技股份有限公司
Identification method of driver response behaviors under group induction information
InactiveCN102750826ALow costImprove practicalityArrangements for variable traffic instructionsDetection of traffic movementTime informationDriver/operator
The invention discloses an identification method of driver response behaviors under group induction information. The identification method comprises the following steps of collecting and processing traffic information, building a driver response behavior model and updating mold coefficients; obtaining cross section traffic flow rate information, traffic state information, stroke time information, accident information and traffic information issued by variable message signs by utilizing traffic information detecting equipment, and obtaining corresponding split flow proportion and corresponding information obedience rate; converting the corresponding information obedience rate into the information obedience rate by using the reference traffic state; building the driver response behavior model, and obtaining the steady-state model coefficient through regression; and updating the model coefficient by using the self-adaption Kalman filter technology according to the steady-state model coefficient and the split flow point upstream and downstream detection traffic flow rate, and realizing the automatic identification on the driver response behaviors. The identification method has the advantages that multi-source detection traffic data is fully utilized, the traffic behavior collection reliability is improved, the cost is saved, and the foundation is laid for the implementation of active intelligent traffic induction.
Owner:ZHEJIANG UNIV
Automatic driving feasible region control method and system based on roadside fusion perception
ActiveCN112216135AEasy to identifyWarning or restriction onRoad vehicles traffic controlTraffic crashAutomatic control
The invention provides an automatic driving feasible region control method and system based on roadside fusion perception, and the method comprises the steps: recognizing a traffic event, which is notbeneficial to the perception of a vehicle automatic driving system, on a road through fusion perception equipment installed on the road, and according to the type of the traffic event, enabling different vehicles with automatic driving / advanced auxiliary driving functions to be subjected to feasible region judgment, and transmitting instructions to vehicles with related functions on the upstreamof an event occurrence road section through a vehicle-road communication technology, so that the purpose of early warning or limiting the operation of a vehicle automatic driving or advanced auxiliarydriving system is achieved, and the road traffic safety is improved. By means of direct communication with the vehicle-mounted terminal or notification of the variable message sign and the toll station checkpoint, under the condition of not directly participating in vehicle automatic control, an automatic driving / advanced auxiliary driving system can be warned or limited to be started, an automatic driving / advanced auxiliary driving warning tool is provided for roads or traffic managers, and traffic accidents are reduced.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT
Traffic signal device for driver/pedestrian/cyclist advisory message screen at signalized intersections
InactiveUS9153128B2Avoid distractionsLight colorControl with pedestrian guidance indicatorVariable-message signComputer science
An encrypted traffic signal device controller (TSDC) and an Electronic Variable Message Sign (EVMS) at intersection roadways and related traffic intersections where the invention system is installed at traffic light intersections which will be triggered at the red light sequence where vehicles / pedestrian / cyclists are stopped. After the traffic light turns red, the time delay of the red light will trigger an audio and visual public announcement which will be of assistance to the driver and enable the driver to pay attention to the announcement without being concerned about diverting the driver's attention from driving the vehicle since the vehicle is stopped at a red light and the driver can devote his attention to reading the information provided.
Owner:HOLZMAC
Variable message sign application system, electronic navigation apparatus and method
ActiveCN102692233AEffective guidanceImprove driving efficiencyInstruments for road network navigationAnalysis dataVariable-message sign
The invention provides a variable message sign (VMS) application system, an electronic navigation apparatus and a method. The electronic navigation method comprises steps of: receiving a VMS message and a VMS geographic location message; conducting classified analysis on the VMS message to obtain analysis data; conducting map-matching by using the analysis data and / or the VMS geographic location message to obtain map data; and carrying out navigation application according the map data. The VMS application system comprises a VMS monitor center and at least one VMS. The VMS monitor center sends the dynamic message published by the VMS to the electronic navigation apparatus and carries the geographic location message, so that the electronic navigation apparatus can utilize the received message to conduct navigation. According to the invention, dynamic road message can be acquired by the electronic navigation apparatus on a real-time basis, so that the electronic navigation apparatus can guide travelling more effectively.
Owner:NAVINFO
Expressway tunnel park positioning detection and link alarm device and method
The invention discloses an expressway tunnel park positioning detection and link alarm device and an expressway tunnel park positioning detection and link alarm method and belongs to the technical field of visible light detection. The device comprises a park positioning detection device, a terminal computer, ZigBee equipment and a variable message sign, wherein the park positioning detection device further comprises an alarm lamp, a dual-element visible illumination intensity detecting circuit and a processor module. The park positioning detection device provided by the invention is small in size, low in cost and convenient to mount, the travelling state of a vehicle in a tunnel can be detected without a dead corner left, and a vehicle stop position can be determined; and two thermistors and a band-pass filter are innovatively combined into the dual-element visible illumination intensity detecting circuit, and the dual-element visible illumination intensity detecting circuit is used for detecting the condition that the resistance of the dual-element thermistors is not uniformly changed due to the illumination of vehicle lamps during a vehicle driving process, so that interference on detection caused by environmental illumination and external radio-frequency signals is prevented, and the vehicle driving process and abnormal park condition are more effectively detected.
Owner:沈阳新一代智通科技有限公司
Tunnel fire-fighting system
The invention relates to a tunnel fire-fighting system. Two fiber redundant token ring networks are disposed in left and right holes of an expressway tunnel and are independent of each other. A tunnel master control PLC (programmable logic controller) and a plurality of tunnel field PLCs are connected in the fiber redundant token ring networks, and a variable message sign, a lane indicator, lighting equipment, a CO / VI detector, tunnel ventilation equipment and a fire detector are in signal connection with the tunnel field PLCs, each tunnel field PLC is in signal connection with a monitor computer through the tunnel master control PLC, and the monitor computer is also in signal connection with sprinkling fire-extinguishing equipment and gas fire-extinguishing equipment in the tunnel through a DDC (direct digital control) controller; the monitor computer further transmits alarm information to wireless signal transceivers in passing-by vehicles through a wireless network and gives out warnings through a vehicular warning unit, other vehicles receiving the warning information are not more than 10km away from the tunnel in which an accident happens, and the warning information includes a tunnel name and coordinate location of the tunnel in which the accident happens and countermeasures.
Owner:ANHUI WANTONG TECH
Self-adaptive variable speed limit and information cooperative control system for expressway in adverse weather
ActiveCN113129610AGuarantee the safety of life and propertyImprove traffic safetyControlling traffic signalsSimulationTraffic flow
The invention relates to a highway adaptive variable speed limit and information cooperative control system in adverse weather and belongs to the technical field of intelligent traffic management and control. The system comprises a variable message sign VMS, a variable speed limit signboard VLS, a traffic meteorological monitoring station RWS, a traffic flow detection device TRA and a cooperative controller; wherein the variable message sign VMS is used for issuing the type, position and management and control measures of the current severe weather; the variable speed limit signboard VLS is used for issuing a real-time speed limit value of the current speed limit area; the traffic flow detection equipment TRA is used for collecting the traffic flow information; the traffic meteorological monitoring station RWS is used for acquiring meteorological parameters of a road section in real time; according to the method, road conditions, meteorological environment differences and the like of continuous speed limit areas of mountainous highways are combined, cooperative control technologies such as the variable speed limit signboards and the variable information boards are adopted, traffic safety and efficiency of the highways in severe weather are improved, and the method is easy to apply and popularize.
Owner:BROADVISION ENG CONSULTANTS
Level crossing information plate releasing method fused with road and railway information
ActiveCN105047023AImprove securityReduce safety incidentsSimultaneous traffic control systemsRoad traffic controlLevel crossing
The invention provides a level crossing information plate releasing method fused with road and railway information. The method comprises: a road traffic control center, according to opening and closing time of a first level crossing, the first position of a variable message sign (VMS) and shortest time needed from the first position to the first level crossing, controls display content of the VMS, wherein the display content of the VMS is used for providing line traffic auxiliary information for a vehicle wanting to pass the first level crossing, and the VMS is arranged at a crossroad. The method provided by the invention can mitigate the congestion state brought by closing of a level crossing and improve the safety of the level crossing.
Owner:BEIJING JIAOTONG UNIV
Optical element for variable message signs
InactiveUS20060077661A1Increase brightnessSimple and cost-effective structureAircraft componentsPavement lightsLight beamOptoelectronics
An optical element for variable message signs includes an oblong housing, in which at least one light source as well as at least first and second lenses are arranged successively in the longitudinal direction of the housing. The lenses serve for defining the beam path of the light emitted by the light source in the irradiation direction, wherein the lens arranged closer to the light source is formed as a converging lens, and the lens arranged farther away from the light source is formed as a rod lens.
Owner:DAMBACH WERKE
The present invention concerns a system for controlling traffic
ActiveUS20190114843A1Improve air qualityReduce traffic problemsTicket-issuing apparatusTransportation facility accessUrban areaEngineering
A system (200) for controlling road traffic comprises measurement station (210) for determining air pollution in an urban area comprising pollution zones (221-223) with predetermined geographical boundaries. A central system is configured to charge a pollution fee to a vehicle (10) moving in the pollution zone when the air pollution exceeds a threshold value. Different vehicles are charged different fees, e.g. based on their function and emission. A variable message sign (240) warns of the increased fees, so most private cars choose alternative routes (232, 233) around the pollution zone (222, 223), but allow motorists willing to pay a substantial pollution fee to use route (231). Heavy diesel vehicles may be exempt from pollution fees along a direct route (231) through the pollution zone to keep them away from small roads and residential areas. A method using mobile devices for registering passengers for a passenger discount is also described.
Owner:AFFIN AS
System and method for constructing a distributive wireless controller
InactiveUS20050265271A1Special service provision for substationNetwork traffic/resource managementWireless controlControl communications
This invention provides a system and method for constructing, establishing and deploying a distributive wireless command and control system utilizing the internet to facilitate that command and control. Each and every aspect of this system is designed to provide alternative means of maintaining the complete command and control communication link over every portion of that link. Should any portion of the link fail an alternative will be substituted until all alternatives have been exhausted. One specific realization of the invention is disclosed for the complete wireless command and control of Dynamic Message Signs (DMA), Changeable Message Signs (CMS) and Variable Message Signs (VMS).
Owner:GARON HOWARD MARK
Dynamic VMS (Variable Message Sign) layout networking method and device
ActiveCN103617739ARealize dynamic changesImprove traffic guidance effectArrangements for variable traffic instructionsStructure of Management InformationRoad networks
The invention discloses a dynamic VMS (Variable Message Sign) layout networking method and device, and aims to dynamically display a road network structure and a traffic state and improve a traffic guidance effect. The dynamic VMS layout networking method comprises the following steps: for each VMS display equipment, determining a list of road segments within the guidance range of the VMS display equipment; selecting road segments satisfying a predetermined condition from the list of road segments within the guidance range to form a list of road segments displayed by the VMS display equipment in the present period of time; obtaining the road segment traffic information in the present period of time of the road segments in the list of road segments displayed; determining the corresponding state of each road segment according to the road segment traffic information of each road segment and displaying the state of each road segment on the VMS display equipment; determining whether the guidance effect in the present period of time is superior to that of the last period of time according to the road segment traffic information; if the determination result is negative, returning to the step of selecting road segments satisfying the predetermined condition from the list of road segments within the guidance range to form the list of road segments displayed by the VMS display equipment in the present period of time.
Owner:BEIJING STONE INTELLIGENT TRANSPORTATION SYST INTEGRATION
Method for processing LED (Light-Emitting Diode) variable message sign
ActiveCN103456246ASolve the sealing problemGood waterproof effectGas-tight/water-tight arrangementsIdentification meansUltrasonic weldingEngineering
The invention provides a method for processing an LED (Light-Emitting Diode) variable message sign. The method comprises the following steps: step 1, increasing ultrasonic lines for a mounting surface of lenses; step 2, designing and producing a metal fixing bottom die for ultrasonic welding for a lens support; step 3, selecting a lens support material and a lens material easy for ultrasonic welding fusion; step 4, fixing the lens support onto the metal fixing bottom die; step 5, tidily placing the lenses on the lens support, and ensuring that each lens is fixed by both a positioning column of the lens and a positioning hole of a bracket; step 6, adjusting an ultrasonic machine for welding. As the ultrasonic welding realizes the fusion of two similar materials, the sealing problem is thoroughly solved, and the best surface waterproof effect at present is achieved. Through the isosceles triangular section design of the ultrasonic lines and a precise bottom die design, the ultrasonic welding can cause the uniform match of the lens support and the lenses to achieve the best effect at present.
Owner:YAHAM OPTOELECTRONICS CO LTD
VMS (variable message sign) information routing method based on vehicle position estimation
The invention discloses a VMS (variable message sign) information routing method based on vehicle position estimation, and the method comprises the following steps: (1), obtaining the traffic violation information of a vehicle; (2), constructing a local highway network model of a region where a traffic violation place is located, and pre-estimating the paths of the vehicle, wherein each path is provided with at least one VMS; (3), calculating the probability that the vehicle arrives at the first VMS on each path; (4), estimating the time T1 when the vehicle arrives at the VMS M with the largest probability, and publishing the traffic violation information at the moment T1 through the VMS. The method gives full consideration to the parameters of the violation place and time of the vehicle and the time difference between the current time and the violation time, and enables the notified violation information to be directive, to have real-time performances and to be visual.
Owner:ZHEJIANG UNIV +1
Multifunctional command and dispatch system
ActiveCN105096599AReceiving Event ChangesReceiving an improvement in the occurrence of an eventDetection of traffic movementEnvironmental monitorComputer terminal
The invention relates to a multifunctional command and dispatch system, wherein a webcam is connected with a background monitor server through a communication network, an LED variable message sign is connected with the background monitor server through the communication network, a weather monitor of an environmental monitor station on a highway is connected with a server used for storing meteorological data, the server used for storing the meteorological data is connected with the background monitor server through the communication network, a monitor terminal is connected with the communication network in a monitoring center, and a dispatch terminal is connected with the communication network in the monitoring center. The arrangement of the system avoids a defect in the prior art that an active monitor and dispatch system aimed at routes, roadbeds, road segments, bridges, culverts, tunnels and the environment along the routes of highways is absent, so that action is taken only after accidents have occurred, and then the following handling process is inefficient.
Owner:NANJING MICROVIDEO TECH
Variable message sign information release effect evaluation method based on driving simulation technology
PendingCN111667568ASystematic Calculation MethodQuantitative calculation methodCosmonautic condition simulationsDetails involving 3D image dataEvaluation resultOriginal data
The invention discloses a variable message sign information release effect evaluation method based on a driving simulation technology, and belongs to the field of road traffic management. The variablemessage sign information release effect evaluation method, based on a driving simulation technology, builds a three-dimensional scene model of a road section where the variable information board is located, obtains original data of an experimental process through driving simulation, and carries out layered calculation on three first-level and eight second-level indexes including the visual recognition effect (visual recognition time, static visual recognition distance, dynamic visual recognition distance and visual recognition angle) of a driver, the operation behavior (the brake pedal depthchange rate and the accelerator pedal depth change rate) and the vehicle running state (the visually recognized speed change rate and the speed standard deviation) according to the original data, to obtain a comprehensive evaluation result of the variable message sign road condition information release effect. According to the variable message sign information release effect evaluation method, thedata is collected through the driving simulation technology, and the evaluation result of the road condition information publishing effect of the variable information board is obtained through calculation, and the variable message sign information release effect evaluation method can be applied to selection and optimization of a newly designed variable information board and evaluation of the information publishing effect of an existing variable information sign.
Owner:BEIJING UNIV OF TECH
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