Short-term prediction method for occupancy of effective parking space of parking lot

Abstract

The invention discloses a short-term prediction method for occupancy of an effective parking space of a parking lot. The short-term prediction method comprises the steps as follows: 1) determining a time sequence of the occupancy of the effective parking space of the parking lot; 2) carrying out wavelet decomposition to the time sequence of the occupancy of the effective parking space through a wavelet function, thus obtaining a low-frequency coefficient vector and a high-frequency coefficient vector; implementing the wavelet reconstruction to the low-frequency coefficient vector and high-frequency coefficient vector, so as to obtain the time sequence of N+1 reconstructions; 3) establishing a wavelet neural network model to the time sequence of the N+1 reconstructions for predicting, thus obtaining N+1 prediction results; and 4) accumulating the N+1 prediction results, so as to obtain the prediction results corresponding to the time sequence of the occupancy of the effective parking space. According to the short-term prediction method disclosed by the invention, a wavelet analysis-wavelet neural network combinational prediction model is raised to perform short-term prediction to the occupancy of the effective parking space of the parking lot according to the short-term variation characteristic of the occupancy of the effective parking space of the parking lot, therefore, the prediction accuracy and the stability are improved.

Description

technical field [0001] The invention belongs to the technical field of intelligent information processing in an intelligent transportation system, and relates to a short-term prediction method for an effective berth in a parking lot, which can predict the vacant berth information of the parking lot in real time. Background technique [0002] Whether there are vacant berths in the parking lot for parking is one of the most concerned issues when drivers choose to park. It is a key technology of the parking guidance information system to obtain the information of the vacant parking spaces in the parking lot by using the information collection technology of the parking spaces and to predict them in real time. More accurately predict the vacant berth information of the parking lot, which can be used as a reference for system users when choosing a parking lot. [0003] The parking spaces included in the parking guidance information system mainly refer to the parking spaces availa...

AI Technical Summary

Problems solved by technology

At present, the short-term prediction of parking spaces in China mostly adopts the BP neural network method. Although this method has the advantages of rigorous derivation process and clear physical concept, it also has the disadvantages of low prediction stability and low accuracy.

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