基于超声测距的智能车辆防追尾安全测控仪

Design of Measure and Controller of Intelligent Vehicle Based on Ultrasonic Wave Distance Measuring

针对机动车辆行驶中的防追尾问题,提出了一种基于超声测距原理的新型智能防追尾安全测控仪研制方案。设计了超声发射和接收传感电路实现车距的快速测量,采用单片机实现测距精度的提高和车距变化率的计算,设计了油门节气门开度的步进电机控制电路实现车速的自动辅助调节。在软件设计中采用了嵌入式C语言和汇编语言代码的混合编程技术,进一步增强了测控仪的鲁棒性。试验结果表明:该方案测控精度高、可靠性强,能够有效降低行驶车辆追尾事故的发生。

In order to solve the problem of vehicle anti-collision,a new measure and control instrument of the vehicle anti-collision was designed.The ultrasonic transmitting and receiving sensor circuit was realized for vehicle distance measurement,using a single chip microcomputer,ranging accuracy and distance calculation of the rate of change of the accelerator.Design of solar term door opening degree of the stepper motor control scheme realized speed automatic auxiliary regulator.In the software design of the embedded C language and assembly language code of mixed programming technology,further enhances the robustness of control instrument.The experimental results show that the scheme has high measurement and control precision,strong reliability,and it can effectively reduce vehicle rear-end accidents.