Bend velocity automatic control method based on LTE-V

Abstract

The invention discloses a bend velocity automatic control method based on LTE-V. The method comprises the steps that an LTE-V vehicle-mounted unit which is installed on a vehicle is utilized to broadcast road information in real time according to an LTE-V road side unit which is installed in front of a bend and vehicle information transmitted by a vehicle CAN network to calculate safety critical velocity and the safety range for starting early warning before a vehicle enters the bend; when the real-time velocity of the vehicle is lower than the safety critical velocity, the safety critical velocity is simply prompted, and if the velocity is greater than the safety velocity, timely warning is instantly conducted. According to the method, the possibility of overturning and side spinning andinner wheel sliding displacement rate are taken into account when the safety critical velocity is calculated, so that the obtained safety velocity is scientific; the safety range of starting the earlywarning takes road surface situations into account, the method is safe and has no risks, and it is ensured that the velocity is reduced before entering the bend.

Description

technical field [0001] The invention relates to an LTE-V-based automatic speed control method for curves, and belongs to the technical field of automotive electronics and safety. Background technique [0002] Excessive speed on curves is an important cause of accidents such as sideslips and rollovers, especially for large commercial vehicles, which often cause major safety accidents. Since the driver may not be familiar with road curve information or the vehicle speed is too high, it is more likely to cause vehicle sideslip and rollover accidents. Early warning or control of the vehicle before the vehicle enters the curve is of great significance to driving safety. [0003] The current curve speed control assist technology has the following problems: [0004] (1) Some curve speed warning technologies can only provide qualitative information, such as "slow down" and other information, and cannot give accurate speeding information. [0005] (2) Some curve speed warning techn...

AI Technical Summary

Problems solved by technology

[0004] (1) Some curve speed warning technologies can only provide qualitative information, such as "slow down" and other information, and cannot give accurate speeding information

[0005] (2) Some curve speed warning technologies are based on RFID (radio frequency identification technology). The curve information cannot be updated in real time through the cellular network, and the information on the deceleration and braking of the own vehicle cannot be sent to the vehicle behind, which is not conducive to traffic safety.

[0006] (3) When the curve has multiple curves or changing curves, the current speed warning technology for curves does not give a speed alarm for the curve with the smallest curvature radius, which will cause the vehicle to brake in the curve, which may easily cause rollover and sideslip Waiting for an accident

[0007] (4) Only warning and no speed control

If the driver ignores the warning and does not take any measures, the effect of improving driving safety will not be achieved

Images