96 results about "Road grading" patented technology

The invention includes steps: (1) establishing corresponding table between number of road junction and name of road section; (2) discriminating and processing error data; (3) obtaining average speed of road section. Average time of travel on road section is equal to sum of average running time and average waiting time. Running length of vehicle is equal to length of road section minus length of vehicle queue at road section under average meaning. Roads are divided into rapid road, main road, secondary road, and branch road. Detecting speed on the spot obtains anticipant speed on different grades of road. Average running time is obtained from average running length of vehicle divided by anticipant speed on different grades of road. Based on M/M/1 theory in queuing theory, the disclosed method obtains average waiting time. Based on length of road, average running time and average waiting time, the method obtains average speed on road. Features are: easy, quick and high reliability.

The invention discloses a rapid path planning method comprising the following steps: (S1) establishing space sublayers for a road network according to a road grade, dividing mesh regions for each layer of road network, and establishing a topological structure of the road network according to road data; (S2) respectively carrying out lifting exploration on an initial position and a final position of a low-level road network, and searching a hop position entering a high-level road network; and (S3) planning a path between an initial hop and a final hop on the high-level road network according to a shortest path algorithm. In the invention, a navigation path is planned by using methods such as road mergence, two-way lifting exploration and the like, and the requirement of the traditional navigation system for rapidly calculating and planning the optimal path can be met.

The invention provides a method for arranging network traffic flow detectors based on a road network topological relation. Firstly, road sections in a road network are divided into road network inlet road sections, road network outlet road sections and road network internal road sections, traffic generation road sections are determined, and the number of needed least detection road sections is the sum of the number of the road network inlet road sections and the number of traffic generation road sections; then according to the intersection traffic flow conservation law, a road network flow conservation equation set is built; then detection priority ordering is carried out according to road levels and costs, and the reversed order of the priority order is used as a detection weight; finally the highest priority of a detection road section set is used as an optimization target, a detector arranging optimization model is built with the number of arranged detectors and the order of a detector optimization coefficient matrix as restraint conditions, and the greedy algorithm is used for solving to determine the optimal arranging positions of the detectors. Construction and maintenance cost of a road network traffic flow detection system can be lowered, and OD matrix investigation high cost and distortion assumption of a traveler path choice motion are avoided.

A data hierarchy and organization method capable of fast displaying road conditions includes defining display levels of different road sections in map data according to road hierarchy information; then, combining the road sections with same index identifications into a road section according to index identifications of a road section coding schedule in the map data and performing thinning; establishing code corresponding indexes which can be rapidly and mutually searched between road condition display data and the road section coding schedule according to a unique index of road condition information; and finally, generating road condition display data according to the established code corresponding indexes and subjecting the road condition display data to partitioning organization to display the area road conditions.

The invention discloses an electric vehicle remaining driving range estimation method and device, a storage medium and equipment, and belongs to the field of electric vehicles. The method comprises the following steps: acquiring the remaining available power of a battery in real time; acquiring unit mileage power consumption according to the road grade and congestion degree of a travel path and the driving style of a driver; and calculating the remaining driving range according to the remaining available power and unit mileage power consumption of the battery. The influence rule of the drivingstyle of the driver, the road grade of a planned travel and the real-time congestion degree of the road condition on the travel energy consumption is comprehensively analyzed, and the unit mileage power consumption in the driving process of the electric vehicle is quantitatively predicted. According to the invention, the remaining driving range estimation method fusing the pedestrian, vehicle androad information is adopted, and more comprehensive factors are considered, so that the remaining driving range of the electric vehicle can be calculated more accurately, and the mileage anxiety of auser can be relieved.

The invention discloses a network-level road maintenance management decision-making system, which comprises a data management subsystem, a road section sorting platform and a network-level road surface decision-making system, wherein the data management subsystem is used for acquiring and storing spatial data and attribute data of a road; and performing statistical analysis based on each highway,and generating an analysis report and a statistical report based on an analysis result. According to the method, the weight of each influence factor is calculated by adopting an analytic hierarchy process. Wherein each influence factor of the network-level decision comprises road surface performance, road surface structural strength, road surface structural materials, traffic axle loads, road ages, road levels and the like; On the basis of real road information, a road management decision-making system supported by multiple kinds of data is constructed, and a road database is analyzed in a data organization mode, so that maintenance decision making of a road is facilitated; and furthermore, an optimal maintenance strategy can be sought under the constraint of specified budget funds and other resources, so that the benefit target is maximized.

The invention discloses a method for generation of a typical road spectrum, belonging to the technical field of road engineering and vehicle engineering. The method comprises the following steps: collecting the spatial domain data of a road pavement section and to form a spatial domain curve of the road pavement section, and then converting the spatial domain curve into a road spectrum curve by means of Fourier transform; operating a multi-octave pass band to filter the road spectrum curve; repeating the procedures above for all test roads to obtain all flat road spectrum curves and drawing the curves in the 8-grade road grading map of a double-log coordinate; and calculating the average values of all spectrum values in each octave and connecting the average values to obtain an overall typical road spectrum curve. The method can be used to generally evaluate and reflect the road pavement quality and evenness as well as the power distribution under different spatial frequencies. In addition, the method can grade the roads and perfom regional researches, and particularly has obvious advantages when being used for comparing and researching regional road differences in different regions.

The invention discloses a traffic circulation index building method with the consideration to the characteristics of an urban road traffic network, and the method comprises the following steps: S1, constructing an urban road network model; S2, calculating an influence factor; S3, calculating traffic state values of road segments; S4, calculating a weighting factor of each road segment; S5, calculating a density level coefficient of an area; S6, calculating a traffic circulation index value of the area; S7, evaluating the urban traffic state based on the traffic circulation index value; According to the invention, the road level, regional road network density, traffic node accessibility and connectivity of the urban road traffic network are introduced to an urban traffic circulation evaluation model, thereby solving a problem of the evaluation of the comprehensive circulation conditions of the urban traffic caused by the increasingly complex urban road network and the quick developmentof traffic.

The invention discloses a setting method for far guidance of a road intersection minor road, and belongs to the field of traffic control and traffic design. The used technical solution is that, in theintersection in which the grades of the intersected roads have the difference, the far guidance is performed to the minor road traffic stream, a traditional intersection organization mode is used forthe main road traffic stream, and far guidance geometrical parameters of the road intersection minor road are determined by calculating. The method specifically comprises the following steps: 1) determining the distance from the direction change position of the far guidance traffic stream to the intersection; and 2) determining the queuing lane length of the far guidance direction change trafficstream. Through the delay comparison of intersection vehicles before and after the far guidance, the far guidance channelization design of the minor road is proved to effectively reduce the vehicle average delay, relieve the traffic jam, and improve the operating efficiency of the intersection.

The invention discloses a map road annotating method of a navigation terminal. The map road annotating method comprises the following steps of: displaying map data to be displayed on a screen of the navigation terminal; dividing the screen of the navigation terminal; judging and determining road information needing to be displayed; detecting the road information needing to be displayed; determining the annotation density of road names; and annotating the road names according to road grades. According to the map road annotating method, aiming at the problems of the commonly used annotating method, a grid searching method is improved by considering the density distribution of the road annotations when road annotations are displayed, thereby the optimized display effect is realized.

Road grade is modeled over a region in which a vehicle is driven on roadways having a grade that varies over a plurality of predetermined grade ranges. A succession of grade values are generated while operating the vehicle at a predetermined rate, wherein each grade value identifies a respective grade range then being encountered. A Markov chain road-grade model is updated in response to the succession of grade values, wherein the model represents respective elements of probability in a matrix of transition events from each predetermined grade range to a respective next-in-succession grade range. Each element of the matrix has a value π_i,j representing a weighted frequency of transition events from a first respective grade value to a second respective grade value divided by a weighted frequency of transition events initiating from the first respective grade value, so that the matrix successively approximates the road grade of the region.

The invention relates to the technical field of vehicle traveling road level division. According to the vehicle traveling road level precise division method disclosed by the invention, a precise vehicle traveling road level method is provided. The vehicle traveling road level precise division method comprises the steps of: obtaining traveling data of a vehicle in real time, calculating matched road information based on the traveling data and navigation map data, calculating most possible traveling road information of the vehicle in a first time section deltaT1 by using a statistical calculation method, and further obtaining a correct traveling road level of the vehicle in complex and interferential roads through a vehicle traveling road level judgment method.

The invention relates to the technical field of geographic position data processing, in particular to a road data reduction and storage method suitable for real-time road condition broadcast. The method comprises the following steps: (1) processing original navigation electronic map road data, that is, screening roads according to road grade names, screening roads according to the road forms and characteristics, enabling two-line roads to be single-line roads, recombining and carrying out road node compression; (2) building a three-layer road system structure according to the information of roads with the same names; (3) storing the processed road data in a geoJSON format document structure according to the road stratification system, wherein the geoJSON format document structure is applied to voice broadcast of road conditions and drawing of a simple road condition diagram. According to the invention, the road data in the navigation electronic map is simplified, redundant information is eliminated, and the road storage structure suitable for road condition broadcast is designed.

The embodiment of the invention provides a path generation method and device, terminal equipment and a storage medium, and is applied to the field of navigation maps. The method comprises the steps of obtaining the road attribute information of each road in a road set, determining the road grade of each road according to the road attribute information of each road, wherein the road set comprises N roads, and N is a positive integer; determining the road weight of each road according to the road grade of each road and the road attribute information of each road; according to the determined road weights of the N roads, constructing a road network topological graph, wherein the road network topological graph comprises N connecting edges corresponding to the N roads respectively, and the edge weights of the N connecting edges are in one-to-one correspondence with the road weights of the N roads; and when a path planning request is obtained, determining a target road between the road starting point and the road end point according to the road network topological graph, and outputting the target road. According to the invention, the road weight can be determined according to the road attribute information, and the accuracy of the road weight is improved.

The present invention relates to a determining method for the traffic guidance road segment of an urban variable information-identified ground. According to the technical scheme of the determining method for the traffic guidance road segment of the urban variable information-identified ground, the phenomena of unreasonable variable information-identified guidance road segments, resource waste, public dissatisfaction and the like can be avoided. In combination with urban ground road recurrent congestion discrimination indexes, road grade discrimination indexes and variable information-identified road guidance forms, variable information-identified guidance road segments are more scientific and more reasonable.

The invention relates to the field of data visualization, and discloses a road optimization method and system, a terminal and a storage medium, and the method comprises the steps: obtaining the current spatial data of a to-be-optimized road, the current road grade, the historical flow of a person and/or a vehicle, and the spatial data corresponding to the impact factors of the to-be-optimized road; obtaining a demand level of the to-be-optimized road according to the current spatial data of the to-be-optimized road and the spatial data corresponding to the influence factors; judging whether the current road grade of the to-be-optimized road meets the demand grade of the to-be-optimized road or not; if not, generating a current three-dimensional model of the to-be-optimized road according to the current spatial data of the to-be-optimized road; and optimizing the current spatial data of the to-be-optimized road according to the current three-dimensional model of the to-be-optimized roadand the historical flow of people and/or vehicles to obtain optimized spatial data of the to-be-optimized road. According to the invention, the problem that a reconstruction scheme generated by adopting a pure numerical analysis method for a road is poor in congestion solving effect is solved.

The invention discloses a bridge structure optimization method and system based on vehicle load and intelligent equipment. The bridge structure optimization method comprises the steps: obtaining the structure information of a to-be-optimized bridge, and building a finite element analysis model of the to-be-optimized bridge according to the structure information; according to the multi-lane distribution characteristics of the traffic flow and the road grade of the bridge, creating differentiated vehicle load standards and models of all lanes; loading the differentiated vehicle load model of each lane to a to-be-optimized bridge structure for analysis so as to determine bridge member response of each lane position; and determining the structure, the size and the material of the bridge memberat each lane position based on a target reliability least square error principle according to the bridge member response so as to obtain an optimized bridge structure of the current bridge, and carrying out a vehicle loading test on the optimized bridge structure of the current bridge. According to the bridge structure optimization method, the bridge components at all lane positions can have consistent reliability under the action of different lane loads, and the actual application requirements are met.

The invention provides a multi-scale aggregation mode analysis method for a complex traffic network. The method comprises the following steps: firstly, calculating an adjacent matrix, a position attribute matrix, a distance weight matrix, a road grade matrix and a time-phased traffic congestion degree matrix of a road traffic network; secondly, adding a road network weight influence factor on the basis of an original PageRank algorithm to obtain an improved PageRank algorithm so as to determine a key node sorting condition; and finally, drawing a two-dimensional decision diagram through two indexes of key node sorting and shortest path distance, determining a spectral clustering center point and a clustering number, and adding a position, distance, road grade and dynamic traffic congestion degree weight matrix on the basis of a similarity matrix in spectral clustering to obtain a new weighting matrix conforming to an actual road network condition, and then carrying out clustering analysis to obtain a road network aggregation block. According to the method, the block aggregation characteristics of the road traffic network crossing the administrative division can be analyzed, and decision reference is provided for traffic planning, design work, maintenance work and the like.

The invention relates to a road grading method based on a fixed major hazard source and application thereof. The grading method comprises the steps: 1, obtaining road data of a to-be-evaluated road and data of a chemical industry park where the road is located; 2, performing explosion simulation on the fixedly stored hazardous chemical substance to obtain death radius data of a dangerous source; 3, obtaining a hazardous chemical substance influence degree index of the to-be-evaluated road and a comprehensive index of facility performance of the to-be-evaluated road; 4, obtaining a hazardous chemical substance influence degree weight W1 of the to-be-evaluated road and a facility performance comprehensive index weight W2 of the to-be-evaluated road; 5, performing weighted summation on the score and the weight of the influence degree and the facility performance to obtain a comprehensive index Z; and 6, obtaining the danger level of the to-be-evaluated road according to the value of the comprehensive index Z and the grading standard. Compared with the prior art, the method has the advantages that the road facility performance level and the influence of a fixed hazard source on the road are comprehensively considered, and road grading is more objective.

The invention discloses a method and system for configuring a scenic area road sign. The method mainly comprises: acquiring scenic area road vector data and scenic area scenic spot data; interruptingall roads according to the intersections of roads to obtain new road vector data; traversing the starting points and the end points of all interrupted new roads, and using points other than suspensionpoints, repetition points and loop nodes as a road sign rough selection result; scoring locations in the road sign rough selection result according to road grades, and deleting the locations with lowscores; traversing all locations subjected to score selection, deleting redundant locations; calculating the service range of each location, adding road sign locations to the uncovered parts of the roads which are not fully covered by the service area to obtain a road sign fine selection point result; arranging the scenic spots according to the orientations and the distances of the road sign locations and the scenic spots and the grades of the scenic spots, and selecting the display content of the road signs. The method and system realize the automatic configuration of the scenic area road signs and improves the level of the road sign configuration system in the scenic area.