Vehicle gear recognition method and device

Abstract

The invention discloses a vehicle gear recognition method and device. The method includes the steps of building a vehicle body reference coordinate system and a gear reference coordinate system, collecting a vehicle body acceleration signal according to a built vehicle body coordinate system, and collecting a gear acceleration signal according to a built gear coordinate system. According to an Euler rotation transformation theory of a right-angle coordinate system, a rotation transformation relationship between the vehicle body coordinate system and the gear coordinate system is built, an equation relationship between a vehicle body acceleration vector and a gear acceleration vector is built according to the rotation transformation relationship between the vehicle body coordinate system and the gear coordinate system, a rotation factor between the gear reference coordinate system and the vehicle body reference coordinate system is solved according to the built equation relationship, and the rotation factor serves as a feature value for gear recognition. The method has the advantages of being simple in structure, easy to arrange and easy to achieve in a project. The state of a gear can be recognized when a vehicle runs under actual road conditions and a gear shifting motion is finished.

Description

technical field [0001] The invention relates to the field of vehicle gear recognition, in particular to a vehicle gear recognition method and device. Background technique [0002] In the assessment of the driver by the traffic management department, the driver is required to perform the corresponding operation according to the prescribed gear, otherwise it will be regarded as unqualified or deducted points. [0003] In order to accurately identify the driver's gear position operation, in the existing gear position recognition application technology, there are usually the following methods: one is a mechanical touch switch signal detection device, through various contact or non-contact The switch sensor of the switch acquires the switch signal of each gear to judge the state of the gear at the end of the driver's shifting action. The disadvantage of this scheme is that when the gear increases, the number of gear switch sensors will be increased accordingly. It is more diffic...

AI Technical Summary

Problems solved by technology

[0003] In order to accurately identify the driver's gear position operation, in the existing gear position recognition application technology, there are usually the following methods: one is a mechanical touch switch signal detection device, through various contact or non-contact The switch sensor of the switch acquires the switch signal of each gear to judge the state of the gear at the end of the driver's shifting action. The disadvantage of this scheme is that when the gear increases, the number of gear switch sensors will be increased accordingly. It is more difficult to actually arrange the sensor, and the anti-interference performance of this method is poor. Once a malfunction occurs, when the shift cable is disengaged, the gear position acquisition function will be invalid.

In addition, it is also possible to use the inclination sensor to measure the angular displacement components of the gear on the X-axis and Y-axis to determine the current position of the gear. The disadvantage is that the position of each gear is used, and the complexity of the corresponding calibration will increase, and the recognition is prone to errors when the car is on the uphill and downhill corners.

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