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442 results about "Map matching" patented technology

Map matching is the problem of how to match recorded geographic coordinates to a logical model of the real world, typically using some form of Geographic Information System. The most common approach is to take recorded, serial location points (e.g. from GPS) and relate them to edges in an existing street graph (network), usually in a sorted list representing the travel of a user or vehicle. Matching observations to a logical model in this way has applications in satellites navigation, GPS tracking of freight, and transportation engineering.

Automatic guided vehicle based on map matching and guide method of automatic guided vehicle

The invention provides an automatic guided vehicle based on map matching and a guide method of the automatic guided vehicle. The automatic guided vehicle comprises a map creation module, a location module, a human-machine interaction module, a route planning module, an autonomous navigation module and a dispatching system module, wherein the map creation module is used for creating an environmental map; the automatic guided vehicle utilizes the carried location module to match the observed local environmental information with a preliminarily created global map to obtain pose information under the global situation; the human-machine interaction module is used for displaying the information and working state of the automatic guided vehicle in the map in real time; the route planning module is used for planning a feasible optimum route in the global map; the automatic guided vehicle is autonomously navigated by virtue of the autonomous navigation module according to the planned route; the dispatching system module is used for dispatching the automatic guided vehicle closest to a calling site to go to work. By adopting the automatic guided vehicle, no other auxiliary location facility is needed, no alteration is made for the environment, the capability of the automatic guided vehicle is completely depended, the automatic guided vehicle is utterly ignorant to the environment, and no priori information is provided.
Owner:SHANGHAI JIAO TONG UNIV

Method for acquiring dynamic traffic information based on middleware

The invention relates to a method for acquiring dynamic traffic information based on a middleware, which overcomes the shortcomings of data loss, data noise, and particularly the multi-source isomerism of data, reduces redundant data, ensures the accuracy of the data and improves the accuracy and the reliability of the data. The method comprises the following steps of: 1) transmitting the traffic information by adopting a serial interface communication mode and/or a network communication mode; 2) customizing an information acquisition port which can be matched with different inspection devices of the traffic information by using an interface definition language IDL in the CORBA middleware technique, identifying and normalizing the data from different inspection devices, thus acquiring the real-time dynamic traffic information, such as road traffic flow, vehicle velocity, road occupancy rate and the like; 3) performing preprocessing on the all data acquired by the method, and performing map matching on a floating automobile by using a road matching algorithm based on a network topology relationship; and 4) fusing and saving the multi-source isomerous real-time dynamic traffic data which is preprocessed by the method in a database by using an immune clustering neural network.
Owner:SHANDONG UNIV

High-precision indoor and outdoor fusion positioning system and method

The invention relates to an indoor and outdoor fusion positioning method using a dedicated terminal or a smart phone, which is not only suitable for people, but also is suitable for robots and other intelligent mobile devices. The indoor and outdoor fusion positioning method is characterized in that: 1) indoor positioning is realized by inertial navigation, particle filter, fingerprint matching and indoor map matching, the accuracy is 1 meter or so; 2) the system automatically switches indoor and outdoor scenes, and indoor and outdoor is seamlessly integrated; 3) the dedicated terminal is composed of a universal hardware module, such as GPS, an inertial navigation sensor (an accelerometer, a magnetometer, a gyroscope), a wifi or a Bluetooth module, a communication module and the like; 4) the implementation site is based on the existing wifi network or Bluetooth network, no other hardware needs to be deployed, and thus the cost is reduced; 2) a map marking system with excellent design is provided for marking the map conveniently and quickly without professional skills; and 6) the algorithm is complete and independent, the transportability is high, and thus the indoor and outdoor fusion positioning method can be easily transplanted to other smart phone platforms, robot platforms, wearable devices, etc.
Owner:王庆文

Road network model based on virtual nodes

InactiveCN101162154AEasy to makeAdapt to the requirements of real-time analysis functionInstruments for road network navigationMaps/plans/chartsGeometric networksReal time analysis
The invention discloses a road network model based on virtual nodes, and the road network model is the theory for network digitalization. The structure of the model mainly comprises a geometric net and a topology relationship between road sections. The basic elements of the geometric net comprise virtual nodes, road center-lines and shape points. The virtual nodes represent intersections between road sections, the beginnings of road sections or the ends of road sections, and comprises virtual road sections, inner points, envelopes of inner points; the road center-lines express road sections and are connected through inner points and virtual nodes; the shape points express turning points of road sections. The virtual road sections represent the topology relationship between road center-lines and traffic information, such as the distance damp and the time damp when road center-lines passing through junctions, and multi-lanes at junctions and different driving rules; the inner points determines the position information of virtual nodes. The model of the invention not only overcomes the shortages of traditional model, but also reflects the real road network more truly; and the model has better adaptability for functions, such as map match, route planning and real-time analysis for dynamic transportation network.
Owner:BEIHANG UNIV

GPS aided positioning system and method based on multi-sensor data fusion

The invention relates to the technical field of navigation positioning, particularly to a navigation positioning technique based on multi-sensor data fusion. A GPS aided positioning system based on multi-sensor data fusion comprises a GPS navigation system, a gyroscope and accelerometer combined system, a data processing and fusion module and a map-matching module, wherein the GPS navigation system comprises a GPS module and a data collecting and processing module thereof and is used for acquiring the data of a carrier, such as GPS position, speed, time, number of satellites, and the degree of position accuracy; the gyroscope and accelerometer combined system comprises a gyroscope, an accelerometer and a data collecting and processing module and is used for acquiring the angular velocity,the speed and the accelerated speed of the carrier; the data processing and fusion module integrates the data acquired by the GPS navigation system and the gyroscope and accelerometer combined systemso as to obtain the position information of the carrier; and the map-matching module corrects the error of position information of the carrier outputted by a digital electronic map and the data processing and fusion module so as to obtain the final position information of the carrier. The invention also provides a GPS aided positioning method based on multi-sensor data fusion.
Owner:陶洋

Apparatus for detecting location of movable body in navigation system and method thereof

A method and an apparatus for detecting location of a movable body in a navigation system comprising a map data detector for detecting map information of a region corresponding to location information from an external digital map storage on the basis of the location information of the movable body transmitted from sensors sensing the location and traveling information of the movable body; a memory for storing the map information detected from the map data detector; a filter for computing an optimum location of the movable body including road error included in the map information on the basis of the location and traveling information of the movable body transmitted from the sensors; and a map-matching unit for receiving the optimum location information of the movable body from the filter and correcting the optimum location information by matching the optimum location information and the map information stored in the memory. The method and apparatus can apply a constraint to the location of the movable body by computing the location of the movable body including a width of road, in comparison with a case using only direction of road as a measured value. Further, the method and apparatus increases accuracy of location determination of the movable body by performing real-time correction of the sensor information including error whenever the sensor information is inputted, using the constraint model including the map information.
Owner:SAMSUNG ELECTRONICS CO LTD
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