基于超声波测距的汽车电磁防撞装置

摘要

An automobile collision avoid system is proposed in this paper. On the one hand, the sound alarm unit in this system can give a warn signal to the driver to make the car slow down if distance of adjacent car is too near; on the other hand, the electromagnet is used to reduce the speed of the car. Thus, the automobile collision may be avoided effectively by the useage of the proposed system. When the power of the system is on, it firstly calculate the distance of adjacent cars via ultrasonic distance measurer. Then sound alarm unit will be triggered by the MCU to warn the driver slow down his car if the measured distance is smaller than the predetermined value. At the same time, the electromagnet unit is activated.%汽车防撞装置能够利用语音报警提示司机人为减速，还可利用电磁铁同性磁极排斥的原理主动减速，达到防撞的效果。在该装置通电工作后，首先通过超声波测距，得出相邻汽车之间的距离，当低于预先设定的安全距离时，单片机启动语音报警器，提醒司机人为减速，同时启动电磁铁单元，最大限度地避免汽车相撞。