A road safety risk early warning method
A risk early warning and driving safety technology, applied in the direction of instruments, measuring devices, and mechanical devices, can solve the problems that drivers are difficult to perceive accurately or in time, cannot take driving speed and safety measures, and increase driving safety risks.
Active Publication Date: 2021-05-11
SHANDONG HI SPEED GRP CO LTD
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Problems solved by technology
However, when environmental factors such as roughness of the road surface, temperature and humidity, and soil cover change, the adhesion coefficient also changes, and it is difficult for the driver to perceive the deterioration of the road adhesion condition accurately or in time, and cannot take appropriate driving speed and safety measures, resulting in The sharp increase in traffic safety risks
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[0013] A risk early warning device as shown in Figure 1 and Figure 2 includes a dynamic adhesion coefficient test end, a road surface adhesion coefficient analysis early warning end, and an early warning device power supply end. The dynamic adhesion coefficient test end includes a spring pressure mechanism, a triaxial force sensor 3 and a rubber The friction block 4, the elastic pressing mechanism includes a spring bar 2 and an elastic pressing bar 1, the upper end of the spring bar 2 is connected with the lower end of the elastic pressing bar 1, the triaxial force sensor 3 is fixed on the lower end of the spring bar 2, and the detection of the triaxial force sensor 3 The end is facing down, the rubber friction block 4 is fixed on the detection end of the triaxial force sensor 3, the spring rod 1 is arranged obliquely relative to the road surface, the spring rod 2 is arranged perpendicular to the road surface, and the upper end of the spring rod 1 moves up and down through the l...
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The invention discloses a road safety risk early warning method. The invention comprises the following steps: (1) simulating the movement of tires on the road during driving, and detecting the axial force N and the longitudinal component force F between the simulated tire and the road. 1 and lateral force F 2 , by integrating the axial force N （t） =∫Ndt, and for the longitudinal component F 1 and lateral force F 2 Calculate the integral F separately 1(t) =∫F 1 dt, F 2(t) =∫F 2 dt, t is the set time interval, calculate the dynamic friction coefficient μ of the road surface 1 =F 1(t) / N （t） , μ 2 =F 2(t) / N （t） ; (2) Set the standard value of road surface friction coefficient to μ 0 , Δμ 1 =μ 1 / μ 0 , Δμ 2 =μ 2 / μ 0 , according to Δμ 1 and Δμ 2 The smaller value evaluates the driving risk. The invention can analyze the risk of skidding and sideslip of the vehicle in the moving direction, can display the risk level dynamically in real time, can remind the driver to pay attention to safety, and control the driving speed in time.
Description
technical field [0001] The invention relates to a road safety risk early warning method. Background technique [0002] The safety risk of road traffic operation is not only mainly affected by the overall quality of drivers such as driving skills and experience, awareness of compliance and safety awareness, but also by factors such as road conditions, vehicle conditions and road environment. During the driving process, the road adhesion coefficient is the friction coefficient between the tire and the road surface, which determines the braking performance of the vehicle and has an important impact on driving safety. However, when environmental factors such as roughness of the road surface, temperature and humidity, and soil cover change, the adhesion coefficient also changes, and it is difficult for the driver to perceive the deterioration of the road adhesion condition accurately or in time, and cannot take appropriate driving speed and safety measures, resulting in A sharp ...
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IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 王博毕玉峰周衍平张强民荆强强刘念涛徐润宋杰
Owner SHANDONG HI SPEED GRP CO LTD