38results about How to "Improve traffic management" patented technology

The invention provides a city signal control intersection traffic state detecting and evaluating method based on data characteristic. The system comprises a vehicle state detection unit, a control state monitoring unit, a signal collecting unit, a microprocessing unit, a data transmitting unit, a data processing unit and a traffic state display unit, wherein, the vehicle state detection unit and the control state monitoring unit are connected with the signal collecting unit in parallel; then the signal collecting unit is also connected with the microprocessing unit, the data transmitting unit, the data processing unit and the traffic state display unit sequentially; the microprocessing unit is also connected with a real time data storage unit signal; and the control state monitoring unit is also connected with a traffic signal lamp signal. The method is applicable to various traffic engineering technology activities carried out by traffic real time data analysis, and the method has the advantages of intuition, easy application, high judgement accuracy and wide application range.

The invention relates to the field of intelligent transportation systems, in particular to an ultrasonic electronic bayonet monitoring apparatus which comprises a central processor, a detection system and a shooting system, wherein the central processor is respectively connected with the detection system and the shooting system; the shooting system comprises a controller C, a camera, a flashlight and a support C, wherein the camera and the flashlight are respectively connected with the controller C; the controller C is connected with the center processor; and the detection system is an ultrasonic detection system which comprises a frame A, a frame B, a plurality of isometric ultrasound probes arranged on the top beam of the frame A, a plurality of the isometric ultrasound probes arranged on the top beam of the frame B, a controller A and a controller B. The invention has the beneficial effect that real-time detection and real-time shooting of violations of regulation, such as overspeed, superelevation and superwide of vehicles can be realized by the ingenious utilization of the ultrasound probes on the premises of low cost and freedom from counter reconnaissance.

The present invention provides an urban traffic system state visualization evaluation method based on traffic flow characteristics. Said method includes the following steps: A, in specific road section collecting real-time signal waveform whose continuous time is not less than three months, forming traffic flow state parameter; B, making traffic flow state parameter undergo the process of signal filter treatment so as to obtain traffic flow sample population; C, calculating average value and standard difference of all the samples in sample population, and using ratio value of standard difference and average value as sample discrete coefficient; D, according to traffic flow multidimensional state parameter strong aggregation characteristics forming and optimizing standard characteristic-phase plane graph for evaluation; and E, placing historical data, current data and predictive data of traffic system on the standard phase graph, and visually distinguishing running state of traffic system and its change tendency.

The invention provides a rotary type vehicle-mounted antenna for a Big Dipper navigation system and relates to a dipole antenna. The rotary type vehicle mounted antenna is provided with four pairs of dipole arms, a support bracket and a coaxial feed cable metallic reflection plate, wherein the four pairs of dipole arms are divided into two groups; the front end of each group of rotary type dipolearms is provided with feeding points; a feed cable is provided with internal and external leads; the feeding points of positive arms are connected with the internal lead, and the feeding points of negative arms are connected with a coaxial-cable outer conductor; the feeding points in each group of dipole arms are arranged in the same plane; angles of elevation are formed by four dipole arms and the plane; a distance exists among planes in which the feeding points are arranged and the distance also exists between the planes and a ground plane; the two groups of rotary type dipoles are used forreceiving and transmitting Big Dipper signals respectively; the internal lead is connected with a vehicle-mounted navigation system and the external lead is connected with the reflection plate; and the reflection plate is fixed on a vehicle body. The vehicle-mounted antenna has the advantages of good gain performance, large bandwidth, low return loss and omnidirectional radiation characteristic; in addition, the transmitting signal frequency can cover 1600+ / -100MHz, and the receiving signal frequency can cover 2500+ / -80MHz.

The invention discloses a road network passing efficiency change rate calculation method facing a traffic manager. The method comprises the steps of: selecting and calculating a road network average travel speed and road network transportation efficiency in unit time; carrying out grouped processing the average travel speed and the road network transportation efficiency according to the number of road network running vehicles, and determining a mapping relation of both the average travel speed and the road network transportation efficiency with the road network running vehicle number; defining a road network passing efficiency grouping comprehensive change rate and calculating a weight value; calculating the road network passing efficiency comprehensive change rate before and after implementing a control scheme according to the averaged travel speed, the road network transportation efficiency and an index weight, and performing contrastive analysis on the change of the passing efficiency. According to the invention, the defect that the influence of the alternating quantity cannot be eliminated in the original calculation of the road network passing efficiency change rate is overcome, comprehensive comparison and evaluation of the urban road traffic road network passing efficiency are facilitated, the potential of the policy and measures is excavated deeply, and the data support and decision basis for improving the traffic management level and the road network passing efficiency are provided.

The invention is applicable to the technical field of intelligent traffic, and provides a traffic condition prediction method and terminal equipment. The method includes the steps that traffic data of a preset area with a preset time interval is obtained through a block port system; a traffic flow distribution map of the preset area is determined based on the traffic data; block port speed measurement data of the preset area with the preset time interval is obtained through the block port system; based on the block port speed measurement data, the time needed by a vehicle of passing by each intersection is determined; based on the traffic flow distribution map, the time needed by the vehicle of passing by each intersection and a traffic rule of the preset area, the traffic condition of each intersection of the next preset area with a preset time interval is predicted; based on the traffic condition of each intersection of the next preset area with the preset time interval and the traffic rule of a targeted vehicle, the traffic condition of a targeted intersection which the targeted vehicle will reach is predicted. By means of the traffic condition prediction method and the terminal equipment, traveling prediction of city roads is provided for a traveler, the traveler is helped to choose an appropriate traffic route for traveling, time is shortened, and occurrence of point congestion is avoided.

Embodiments of the invention relate to the field of intelligent transportation, and especially relate to a link travel time calculating method and a link travel time calculating device based on big data. After the single-vehicle time taken by each vehicle passing a link i in an mth period is acquired, the initial travel time value of the link i in the mth period is determined according to the single-vehicle time of each vehicle; abnormal vehicles are determined according to the single-vehicle time of each vehicle and the initial travel time value; and finally, the link travel time value of the link i in the mth period is determined according to the single-vehicle time of the vehicles after elimination of abnormal vehicles. Thus, the quality of data is ensured, the link travel time can be calculated out accurately according to collected traffic flow information and based on the big data technology, real-time traffic information service is provided, a decision-making basis is provided for traffic managers to optimize the traffic organization and ease the traffic congestion, and the level of traffic management is raised.

The invention discloses a cooperative control method of a left-opened-door bus special phase setting and social traffic flow, which comprises the following steps: setting a bus station and a stereo facility which help pedestrians to cross a street; detecting a bus; determining the running time of the bus; determining a signal phase of the bus which drives through an intersection; and setting the bus special phase and a cooperative control plan. According to the invention, the bus stations in two directions are combined and placed at a median strip of the intersection, so that not only the land is saved, but also the bus station points are easier to recognize, and meanwhile, a new concept for planning and constructing of a public transit network is provided, that is, the public transit network is connected based on the bus stations arranged at intersections. With the adoption of the method, the situation that the bus does not stop at an intersection without a bus station while stops at an intersection with a bus station can be basically realized, so that passengers waiting for a long time at an intersection with a bus station can be avoided, thereby shortening the whole driving time of the bus and improving the whole operation efficiency of the bus system. Moreover, the method is functioned as the cooperation of the social traffic flow, so that the passing efficiency of the whole intersections is guaranteed.

The invention relates to a system for collection and service of car networking roadside information. The system comprises a terminal layer and base station groups, wherein the terminal layer is installed through the fact that information of owners and cars is registered and written into a vehicle-mounted unit chip unit, a vehicle-mounted unit arranged on each car has a unique electronic tag, binding of the vehicle-mounted units and the cars is achieved, and real and effective performance of the information of the cars is guaranteed. Distribution of the base station groups makes a road network section of an expressway as a unit, the base station groups are arranged on two sides of the expressway, one section is provided with a plurality of central base stations, one central base station can support access of more than 10 base stations, and space between each two base stations is larger than 500 meters. The central base stations are connected with an expressway optical fiber network, and one or multiple types of optical fiber access or internet access or wireless network access can be selected according to requirements of base station equipment. Different sensors are configured to the base stations according to requirements of different sections, a meteorological sensor, a car inspection sensor and an event sensor are arranged, and the terminal layer and the base station groups conduct exchange on car information through a wireless network.