Navigation parameter acquisition method and vehicle sharp turn judgment method, system and device

Abstract

The invention discloses a navigation parameter acquisition method, system and device. The method comprises the following steps: initializing navigation parameters of a target vehicle by combining an inertial sensor and GPS; performing strapdown resolving on first operation data of the inertial sensor and updating current navigation parameters. The invention further discloses a vehicle sharp turn judgment method, system and device. The method comprises the following steps: acquiring real-time lateral acceleration of the target vehicle; acquiring navigation parameters of the target vehicle withthe navigation parameter acquisition method when the real-time lateral acceleration exceeds the lateral acceleration threshold value, and calculating an azimuth change angle and an attitude change angle; acquiring real-time vehicle speed when the azimuth change angle exceeds the azimuth change angle threshold and the attitude change angle does not exceed the attitude change angle threshold; judging whether the real-time vehicle speed exceeds a vehicle speed threshold; if yes, determining that the target vehicle turns sharply. Speed judgment and judgment accuracy are both taken into consideration, and finally, a judgment result about whether the target vehicle turns sharply can be obtained quickly and accurately.

Description

technical field [0001] The present application relates to the field of vehicle navigation, in particular to a method for obtaining navigation parameters, a method for judging a sharp turn of a vehicle, a system, and a device. Background technique [0002] With the improvement and improvement of the socio-economic level and people's quality of life, cars have gradually become an indispensable means of transportation for people. The absolute number of motor vehicles and the number of new cars in my country have grown rapidly. On the one hand, automobiles have brought a lot of quickness and convenience to the daily life of the public; on the other hand, traffic accidents caused by improper operation of motor vehicle drivers are increasing day by day. According to incomplete statistics, human factors account for as high as 78.32% of traffic safety accidents, which urgently requires the improvement of people's safety awareness and the high attention of government agencies. At the...

AI Technical Summary

Problems solved by technology

[0004] Among them, the method based on lateral acceleration may cause misjudgment of events due to vehicle lane changes, lane departures, "S" curves, and slope turning events similar to sharp turns.

The method based on the direct integration of the gyroscope, although it can roughly judge the attitude of the vehicle, it cannot accurately grasp the information such as the turning angle of the vehicle and the change of the attitude angle, and it is even more difficult to know the aggressiveness of the turning of the vehicle.

Especially in the process of turning on a slope, the movement process of the vehicle is not only manifested as a change in azimuth angle, but also a change in the horizontal attitude angle (pitch angle, roll angle). The method of direct integration using the gyroscope is prone to misjudgment

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