The invention relates to a vehicle speed measuring system based on a tire pressure sensor. The tire pressure sensor comprises an acceleration sensor, an MCU controller and an RF wireless transmitting circuit, the acceleration detection direction of the acceleration sensor is perpendicular to the axial direction of the tire, the acceleration sensor is used for measuring the centrifugal acceleration value in real time when the tire rotates, the acceleration sensor is electrically connected with the MCU controller, and the MCU controller is electrically connected with the RF wireless transmitting circuit; the tire pressure receiver comprises an antenna converter and a DSP (digital signal processor), the antenna converter is wirelessly connected with the RF wireless transmitting circuit, and the DSP calculates the rotating speed of the tire according to the centrifugal acceleration value received in real time and the set diameter of the tire and then calculates the running speed of the vehicle according to the rotating speed of the tire and the diameter of the tire. According to the invention, through the existing acceleration detection function of the tire pressure sensor, on the premise of not additionally adding a device, the speed measurement of the vehicle is realized, and the cost of the whole vehicle and the complexity of a vehicle speed measurement system are reduced.
本发明涉及一种基于胎压传感器的车速测量系统,包括轮胎;胎压传感器,包括加速度传感器、MCU控制器及RF无线发射电路,加速度传感器的加速度检测方向垂直于轮胎轴向,用于实时测量轮胎旋转时的离心加速度值,加速度传感器与MCU控制器电连接,MCU控制器与RF无线发射电路电连接;胎压接收器,包括天线转换器和DSP处理器,天线转换器与RF无线发射电路无线连接,DSP处理器通过实时接收到的离心加速度值与设定的轮胎直径计算出轮胎转速,再通过轮胎转速和轮胎直径计算出车辆的行驶速度。本发明通过胎压传感器已有的加速度检测功能,在不额外增加装置的前提下,实现车辆的测速,并降低整车的成本和车速测量系统的复杂度。
Vehicle speed measuring system based on tire pressure sensor
一种基于胎压传感器的车速测量系统
2023-12-26
Patent
Electronic Resource
Chinese
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