Steering wheel angle sensor

Abstract

The invention discloses a steering wheel angle sensor and relates to the field of vehicle information acquisition. The steering wheel angle sensor mainly comprises a gyroscope signal acquisition module, a single-chip microcomputer data processing module, a Hall angle correction module and a CAN bus sending module. According to a system, a single-chip microcomputer is adopted for data acquisition and processing, the angular velocity and the angle value of a steering wheel are calculated, and then real-time output is carried out through a CAN communication interface. The hall angle correction module triggered by a permanent magnet in the system can effectively remove accumulated drift errors of a gyroscope. Comparison experiments indicate that the designed sensor has the advantages of beinggood in measuring precision, wide in measuring range, simple in structure, stable in performance and the like.

Description

technical field [0001] The invention belongs to the field of vehicle information collection and relates to a steering wheel angle sensor. Background technique [0002] The function of the steering wheel angle sensor is to measure the angle of rotation of the steering wheel. It is an important part of the automotive electronic control system. It can be widely used in steering, chassis height, ESP (Electronic Stability System) and other systems. By calculating the position and rate of change of the steering wheel angle To identify the driver's operation intention. [0003] Traditional angle sensors include potentiometer type, photoelectric type, magnetoelectric type, Hall type, etc. These sensors have complex structure, high cost, or poor anti-interference performance, and the range is generally limited, and can only detect the angle of one circle, while The travel of the steering wheel of the car exceeds two weeks (-780° ~ + 780°). Contents of the invention [0004] The o...

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Problems solved by technology

[0003] Traditional angle sensors include potentiometer type, photoelectric type, magnetoelectric type, Hall type, etc. These sensors have complex structure, high cost, or poor anti-interference performance, and the range is generally limited, and can only detect the angle of one circle, while The travel of the steering wheel of the car exceeds two weeks (- 780° ~ + 780°)

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