Vehicle position estimating system and method

Abstract

The invention relates to a vehicle position estimating system and method. The system comprises a GPS (global positioning system) receiver, multiple vehicle sensors, a model prediction unit and a control unit, wherein the control unit is used for controlling the integration of the vehicle position and speed obtained by the GPS receiver as well as the speedometer and angle data obtained by the vehicle sensor so as to obtain the real-time accurate position of a vehicle when the GPS receiver has position data output; when the GPS receiver does not have position data output, a dead reckoning position error predicting model, which is constructed through a neural network, is utilized to correct a vehicle dead reckoning position so as to obtain the current real-time accurate position of the vehicle. Multiple data are integrated through a Kalman filtering model, not only are the real-time performance and accuracy of a filter guaranteed, but also excessive calculated amount is unlikely to increase. By the exercises of the position error predicting model, the accuracy and reliability of position error predicting are improved, and then the real-time estimation accuracy of a vehicle position isimproved when the GPS receiver does not have data output.

Description

technical field [0001] The invention relates to a vehicle position estimation system and method, that is, a vehicle positioning method, in particular to a vehicle position estimation method based on GPS and dead reckoning. Background technique [0002] With the deepening of the research and application of the global intelligent transportation system, the vehicle positioning technology is also developing continuously. Vehicle positioning requires continuous, real-time and accurate determination of the vehicle's position. In modern vehicle positioning technology, there are many navigation systems suitable for vehicles, such as GPS system, dead reckoning method, map matching method and so on. [0003] The GPS global positioning system is a widely used latest satellite positioning system, which receives signals through a GPS receiver and obtains various information such as vehicle position, speed and time in real time. Its positioning and speed measurement accuracy is high, an...

AI Technical Summary

Problems solved by technology

In the prior art, there is a method of correcting the gyroscope by using a distance sensor such as a laser rangefinder LRF or a stereo camera to measure the distance from surrounding objects, and other means such as electronic tags, wireless signals, and satellite navigation can also be used. The disadvantage of such technical measures is that the correction signal is uncertain, and it cannot be guaranteed that all navigation equipment can be successfully corrected

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