基于STM32的汽车方向盘转角检测系统设计
Design of Automobile Steering Wheel Angle Detection System Based on Stm32

汽车方向盘是汽车驾驶中的重要一环，因此汽车方向盘转角检测系统显得尤为重要。本文采用STM32作为主要控制模块完成基于STM32的汽车方向盘转角检测系统设计。STM32内置的CAN接口和AD转换器，角度传感器和CAN通讯可以直接和单片机传输信息，无需外接复杂的电路。在角度传感器的选择上，选用MLX90316，它可以通过磁场变化来检测角度，并且它可以克服汽车上的多重干扰，使检测更加准确。使用CAN通讯的好处是可以同时使得汽车上的多个节点只需要挂到总线上即可实现节点之间的通讯，省掉了节点之间的连线，对汽车方向盘的设计和安装都有很大好处。这在一定程度上克服了由于机械磨损导致的方向盘转角检测精度降低、采集的数据量少等问题，具有一定的实际应用价值。
Automobile steering wheel is an important part of automobile driving, so the automobile steering wheel angle detection system is particularly important. In this paper, STM32 is used as the main control module to complete the design of automobile steering wheel angle detection system based on STM32. STM32 built-in can interface and AD converter, angle sensor and can communication can directly transmit information with MCU without external complex circuit. In the selection of angle sensor, MLX90316 is selected, which can detect the angle through the change of magnetic field, and it can overcome the multiple interferences on the car and make the detection more accurate. The advantage of using can communication is that multiple nodes on the vehicle only need to be connected to the bus to realize the communication between nodes at the same time, eliminating the connection between nodes, which is of great benefit to the design and installation of automobile steering wheel. To a certain extent, this overcomes the problems of reduced steering wheel angle detection accuracy and less collected data caused by mechanical wear, and has a certain practical application value.