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Traffic safety risk feedback precaution system and method based on microcosmic driving

A traffic safety and early warning system technology, applied in the field of urban traffic and safe driving, can solve the problems of less analysis of microscopic driving status and difficulty in data acquisition

Active Publication Date: 2017-09-29
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, it is very difficult to obtain the data of the actual micro-driving process of the vehicle. Although the traffic safety risk of the vehicle can be analyzed in depth based on the micro-driving process, the relevant research mostly analyzes the traffic safety problem from the perspective of the macro-traffic state, and the micro-driving Less behavioral analysis of states

Method used

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  • Traffic safety risk feedback precaution system and method based on microcosmic driving
  • Traffic safety risk feedback precaution system and method based on microcosmic driving
  • Traffic safety risk feedback precaution system and method based on microcosmic driving

Examples

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no. 1 example

[0100] This embodiment improves the micro driving model based on the Helly model, and the improved Helly model is composed of a safety risk feedback early warning mechanism and a vehicle feedback early warning system.

[0101] Among them, the model of the vehicle feedback early warning system is described as:

[0102] a i (t)=C 1 Δv i (t-τ)+C 2 d i (t-τ)-C 3 -C 4 v i (t-τ)-C 5 a i (t-τ) (1)

[0103]

[0104] Among them, i is the vehicle serial number, a i (t) is the acceleration of vehicle i at time t, τ is the response delay time of the vehicle, a i (t-τ) is the acceleration of vehicle i at time t-τ, Δv i (t) is the speed difference between vehicle i and its preceding vehicle i-1 at time t, Δv i (t-τ) is the speed difference between vehicle i and its preceding vehicle i-1 at t-τ, d i (t-τ) is the distance between vehicle i and its preceding vehicle i-1 at time t-τ, v i (t-τ) is the speed of vehicle i at t-τ, v i (t) is the speed of vehicle i at time t, C 1 ,C 2 ,C 3 ,C 4 ,C 5 These a...

no. 2 example

[0131] This embodiment provides a traffic safety risk feedback and early warning method based on micro-driving, and the method includes the following steps:

[0132] Step S1, collecting data of the current car and the preceding car as input signals. Taking a vehicle feedback early warning system composed of N vehicles on the road as an example, the safety risk early warning of each car-following vehicle is only related to its preceding vehicle. Therefore, only the current vehicle and the data of the preceding vehicle are collected here. Correspondingly, the vehicle feedback early warning system can be decomposed into N vehicle feedback early warning subsystems, and each early warning subsystem includes only the current vehicle and its preceding vehicle.

[0133] Step S2: Combine preset risk indicators to generate an early warning signal.

[0134] Step S3: Early warning is given to the driver of the current vehicle.

[0135] Wherein, generating an early warning signal in step S2 inclu...

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Abstract

The invention discloses a traffic safety risk feedback precaution system and method based on microcosmic driving. The system includes a current vehicle, a fore vehicle and a feedback precaution device; the feedback precaution device is mounted on the fore vehicle, current vehicle data and fore vehicle data are collected to serve as input signals, in combination with preset risk indexes, a precaution signal is generated, and precaution is conducted on a driver of the current vehicle. According to the traffic safety risk feedback precaution system and method, basic data is easy to obtain, risk problems under multiple conditions can be treated, the application range is wide, the driver can judge risks according to personal driving states and then adjust behaviors, the safety and comfort of driving are improved, hidden traffic safety danger of a road is reduced, the reliability and running efficiency of a road system are improved, meanwhile, the traffic safety risk feedback precaution system and method do not rely on specific parameters of a microcosmic vehicle traffic flow model, hardware implementation is easy, the cost is low, and the application range is wide.

Description

Technical field [0001] The invention belongs to the technical field of urban traffic and safe driving, and specifically relates to a traffic safety risk feedback early warning system and an early warning method based on microscopic driving. Background technique [0002] As a main mode of urban transportation, motor vehicle travel is playing an increasingly important role. As the number of motor vehicles continues to increase, traffic and safety issues have become increasingly prominent. Traffic safety issues not only threaten people's lives, but also cause huge economic losses. Therefore, it is urgent to conduct research on traffic safety issues to improve the reliability and efficiency of the road traffic system, so as to alleviate traffic congestion and ensure the efficiency and safety of driving. The study of traffic safety issues mainly includes two factors, namely, the macroscopic traffic state and the microscopic driving state. [0003] In terms of macro traffic, it mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/16B60W40/105B60W50/14
Inventor 赵小梅李倩陆荣琴谢东繁
Owner BEIJING JIAOTONG UNIV
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