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Road water accumulation point identification method and road water accumulation point identification system

A road water accumulation and identification system technology, which is applied in the field of road water accumulation intelligent identification system, can solve the problems of inaccurate identification of water accumulation events, lack of universality of urban road network, difficulty in collecting road geographic information and drainage system information, etc. problem, to achieve good timeliness, simple algorithm, and good robustness

Pending Publication Date: 2019-07-02
SHENZHEN URBAN TRANSPORT PLANNING CENT
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AI Technical Summary

Problems solved by technology

In the prior art, the disadvantage of the former is that it is difficult to collect road geographic information and drainage system information, and it is impossible to accurately identify water accumulation events caused by occasional blockage of the drainage system; the latter mainly focuses on rainfall, accumulation In the study of the impact of water on road traffic, there is no systematic establishment of the process of deriving water accumulation points based on road traffic conditions, or only research on the identification method for severe water accumulation on some roads, and it does not have the ability to be extended to the entire urban road Universality of the network

Method used

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  • Road water accumulation point identification method and road water accumulation point identification system
  • Road water accumulation point identification method and road water accumulation point identification system
  • Road water accumulation point identification method and road water accumulation point identification system

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no. 1 example

[0039] figure 1 It is a schematic diagram of the system for identifying road water accumulation points in the first embodiment. figure 2 It is a schematic diagram of the road water point identification method of the first embodiment.

[0040] The road water accumulation point identification system and the road water accumulation point identification method of this embodiment use real-time access to data such as the speed, flow, and rainfall of the floating car, and use the naive Bayesian model to comprehensively consider the cause of water accumulation (rainfall) and accumulation. Water impact (occasional traffic jams) to ensure the real-time performance of the entire system.

[0041] like figure 1 As shown, the road water accumulation point identification system 100 of the first embodiment includes a vehicle speed evaluation value setting unit 110 , a traffic flow evaluation value setting unit 120 , a rainfall accumulation probability correction coefficient setting unit 13...

no. 2 example

[0081] image 3 is a schematic diagram of the road water spot recognition system of the second embodiment. Figure 4 It is a schematic diagram of the road water point identification method of the second embodiment.

[0082] The results identified by the road water point identification system and the road water point identification method of the first embodiment may have some misjudgments, and the types of misjudgments can be classified into two categories:

[0083] 1) Omission: There is actually accumulated water, but it is not identified. Its main possible reasons:

[0084] A. The threshold is set too high, making the sensitivity to abnormal events poor;

[0085] B. The impact of stagnant water on the road traffic is not obvious;

[0086] C. Road traffic is a frequent congestion period during the flooding period (such as peak hours);

[0087] D. The sample size of road traffic floating car data is low.

[0088] 2) Misjudgment: There is actually no water accumulation, bu...

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Abstract

The invention relates to a road water accumulation point identification system, which comprises a vehicle speed evaluation value setting unit, a vehicle flow evaluation value setting unit, a rainfallwater accumulation probability correction coefficient setting unit and a water accumulation identification unit, wherein the vehicle speed evaluation value setting unit sets the vehicle speed evaluation value of a detected road section according to the current average vehicle speed of floating vehicles on the detected road section and a road section water accumulation vehicle speed threshold; thevehicle flow evaluation value setting unit sets the vehicle flow evaluation value of the detected road section according to the current floating vehicle flow on the detected road section and a road section water accumulation floating vehicle flow threshold; the rainfall water accumulation probability correction coefficient setting unit sets a rainfall water accumulation probability correction coefficient according to the current hourly rainfall on the detected road section and multiple rainfall thresholds; and the water accumulation identification unit enables the vehicle speed evaluation value of the detected road section, the vehicle flow evaluation value and the rainfall water accumulation probability correction coefficient to be multiplied to obtain a water accumulation integrated evaluation value of the detected road section, and according to the water accumulation integrated evaluation value, whether the detected road section is a water accumulation road section is judged. Detection of water accumulation without device can be realized, and the device layout and maintenance cost is greatly reduced.

Description

technical field [0001] The present invention relates to urban waterlogging prevention technology, in particular to road water accumulation based on Naive Bayesian model, which realizes real-time identification of different degrees of water accumulation in the whole road network by combining various relevant data such as rainfall, floating vehicle speed, flow rate, etc. An intelligent identification method and an intelligent identification system for road water accumulation. Background technique [0002] Controlling waterlogging has always been the key work of major cities. However, the current flood control and drainage emergency projects are basically "short, flat, and fast" small projects, mainly to alleviate waterlogging, and it is difficult to cure the problem in a short period of time; It is difficult to cure by engineering construction. Therefore, it is imperative to strengthen the waterlogging monitoring and management of road waterlogging points. [0003] Aiming a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/065
CPCG08G1/0112G08G1/0137G08G1/065G06F16/29
Inventor 戴剑军丘建栋段仲渊陈振武袁敏贤庄立坚
Owner SHENZHEN URBAN TRANSPORT PLANNING CENT
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