基于超声波测距的车辆音量调节系统

Adjustment System of Vehicle Volume Using Ultrasonic Ranging Sensor

采用超声波测距传感器测量侧方及后方障碍物与汽车的距离,通过单片机控制电位器将数字信号转变为电阻值并进行信号放大,最终改变正在工作的汽车音响的电阻值大小,达到减小音量的作用,其目的在于减少倒车的安全隐患,并且能根据车辆倒车时与障碍物的间距进行音量调节,达到提醒驾驶员的效果,有助于保证驾驶员的倒车安全性。

This paper introduced the designing of a basic circuit of the safety volume system of vehicles by using an ultrasonic ranging sensor to measure the distance between the lateral and rear obstacles and the vehicle.The MCU of the controlling potentiometer transformed digital signals into resistance value and amplified the signal.The system consequently changed the resistance value of the working audio and reduced the volume.The design was to reduce the security risks when the car is reversing.Moreover,the design was to adjust the volume according to the spacing between the obstacles and the vehicle to remind the driver and ensure the safety of the driver when reversing.