Evaluation Method of Urban Roads and Intersections Based on Kalman Filter

A technology of Kalman filter and Kalman filter, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as inconsistencies and errors in actual conditions

Active Publication Date: 2017-08-15
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, this method assumes that the vehicles arrive evenly, which is inconsistent with the actual situation, and it is easy to cause relatively large errors

Method used

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  • Evaluation Method of Urban Roads and Intersections Based on Kalman Filter
  • Evaluation Method of Urban Roads and Intersections Based on Kalman Filter
  • Evaluation Method of Urban Roads and Intersections Based on Kalman Filter

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0039] The present invention first determines whether the floating car stops by calculating the critical value of the travel distance, such as figure 1 As shown, the average parking times of the floating car is obtained, and then the Kalman wave optimization process is started. Set the initial average parking times of all cars, and obtain the optimal estimate value of this state from the average parking times of floating cars, the Kalman gain of this state (current state), the covariance of the state equation and the measurement equation, and then use this The optimal estimated value...

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Abstract

The invention relates to an urban road and intersection evaluating method based on Kalman filtering. The method includes the steps of 1, acquiring real-time state information fed back by a floating car, and calculating an average number of stopping times of the floating car; 2, establishing a state equation and a measurement equation of a Kalman filter according to road information and the average number of stopping times of the floating car; 3, performing iterative computing with the Kalman filter used in the step 2 so as to acquire a stable optimal value, namely an estimated value of the average number of stopping times of each car; 4, evaluating urban roads and an intersections according to the estimated values of the average numbers of stopping times of the cars. Compared with the prior art, the method has the advantages such as high accuracy, high efficiency and timeliness.

Description

technical field [0001] The invention relates to the technical field of evaluation of urban roads and intersections based on data collection and processing of floating vehicles, in particular to an evaluation method of urban roads and intersections based on a Kalman filtering method. Background technique [0002] At present, the calculation of parking times at intersections mostly relies on coil data, and traditional methods are used to estimate the number of parking times based on flow, cycle, and green ratio. However, this method assumes that the vehicles arrive evenly, which is not consistent with the actual situation, and it is easy to cause relatively large errors. [0003] Nowadays, more and more urban motor vehicles are equipped with global positioning systems and become floating vehicles, which can feed back various driving information such as the location, time, and speed of the vehicle in real time. When there are enough floating cars, these real-time information c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 马万经吴明敏
Owner TONGJI UNIV
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