148 results about "Information delay" patented technology

The utility model provides a network constrained moving object database-based traffic flow data acquisition and analysis method; wherein, the time and space trace is acquired and stored by means of the technology of network restricted mobile object database, the acquired data is online counted in denomination of atomic driving section and by the technology of time and space statistics and analysis, then a plurality of traffic parameters of the traffic network are acquired on a real-time basis, and the temporal data of the traffic parameter changing is stored. The acquired data reflects the integral time and space trace of the mobile object, simplifies the complexity of the statistics and analysis, enhances the processing efficiency, and provides more sufficient information for data analysis and intensifies the precision of the data processing. Moreover, message delay is eliminated because the process of traffic parameter refreshing can be triggered by updating the positions of the mobile objects on a real-time basis. Compared with the prior traffic flow statistics and analysis method, the utility model has the advantages of high efficiency, high precision and real-time availability..

The embodiment of the invention provides an environmental modeling capability assessment method and system for an autonomous vehicle, and belongs to the field of intelligent transportation. The methodcomprises the following steps: obtaining environment information of a plurality of continuous frames of a vehicle environment detected by a vehicle-mounted sensing system of the automatic driving vehicle; comparing and analyzing the environment information of a plurality of consecutive frames with corresponding real environment information, judging whether one or more of information delay, information missing report and signal false report exist or not, and if yes, counting the time of the information delay and the occurrence frequency of the information missing report and the signal false report; And evaluating the environment modeling capability of the autonomous vehicle according to the information delay time, the occurrence frequency of the information missing report and/or the occurrence frequency of the signal false report. According to the method, the labeling frequency and labeling quantity of information delay, information missing reporting, information false reporting and the like are improved, and more powerful data support is provided for evaluating the environment modeling capability of the autonomous vehicle.