摘要
本文利用超声波在空气中的可传播性及确定的传播速度,通过实时测量超声波在空气中的传播时间,根据时间和速度相乘为距离原理,设计了一种基于MSP430单片机的超声波测距系统。系统通过实时检测汽车尾部与障碍物的距离,并根据设定的距离值由蜂鸣器发出不同频率的警报信息反馈给司机,对正常驾驶行车或倒车安全将起到至关重要的作用。该测距系统最大测量距离6.5米,精确度可达15cm,它具有成本低、非接触、速度快、精度高、可靠性强、适应性好,操作方便等特点,有着广泛的应用前景。
Ultra ultrasound can be spread through the air.Its propagation velocity is determined.The system can measured real-time of ultrasound in air travel time,and Time and speed multiplied the distance.So that the article designed a ultrasonic ranging system based on MSP430 SCM.The system detected the real-time distance between the rear of the car and the obstacle.According to set the distance value,the alarm buzzer sounded different frequency feedback to the driver. Therefore,the system has a crucial role in the safety of drivers or reverse.The maximum measuring distance of the system can reach 6.5 meters with an accuracy of up to 15cm.It has advantages of the low cost,non-contact,high speed and accuracy,reliability,adaptability,and easy to operate,etc.It can be widely applied in the future.
出处
《现代科学仪器》
2009年第5期48-50,共3页
Modern Scientific Instruments
