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Traffic safety risk feedback early warning system and early warning method based on micro 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 microscopic driving state analysis and difficult data acquisition, etc.

Active Publication Date: 2019-09-27
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 early warning system and early warning method based on micro driving
  • Traffic safety risk feedback early warning system and early warning method based on micro driving
  • Traffic safety risk feedback early warning system and early warning method based on micro driving

Examples

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no. 1 example

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

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

[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 serial number of the vehicle, a i (t) is the acceleration of vehicle i at time t, τ is the reaction 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 the vehicle i-1 in front at time t, Δv i (t-τ) is the speed difference between vehicle i and the preceding vehicle i-1 at time t-τ, d i (t-τ) is the distance between vehicle i and the preceding vehicle i-1 at time t-τ, v i (t-τ) is the speed of vehicle i at time t-τ, v i (t) is the speed...

no. 2 example

[0131] The present embodiment provides a traffic safety risk feedback early warning method based on microscopic driving, and the method includes the following steps:

[0132] Step S1, collecting data of the current vehicle and the preceding vehicle as input signals. Taking a vehicle feedback warning system composed of N vehicles on the road as an example, the safety risk warning of each car-following vehicle is only related to the vehicle in front. Therefore, only the data of the current vehicle and the vehicle in front 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 only includes the current vehicle and its preceding vehicle.

[0133] In step S2, an early warning signal is generated in combination with preset risk indicators.

[0134] Step S3, giving an early warning to the driver of the current vehicle.

[0135] Wherein, generating the early w...

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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 in particular relates to a traffic safety risk feedback early warning system and early warning method based on microscopic driving. Background technique [0002] As a major 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 are becoming increasingly prominent. Traffic safety problems not only threaten people's lives, but also cause huge economic losses. Therefore, research on traffic safety issues is urgently needed to improve the reliability and efficiency of the road traffic system, thereby alleviating traffic congestion and ensuring driving efficiency and safety. The research on traffic safety mainly includes two factors, namely the macroscopic traffic state and the microcosmic driving state. [0003] In terms of macro-traffic, it mainly anal...

Claims

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Application Information

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Patent Type & Authority Patents(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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