摘要
以脉冲飞行时间为基础,根据其测量原理,提出了汽车防撞系统的整体方案。针对近距离低速行驶的车辆,设计了系统的硬件和软件部分。系统的总体结构由激光发射模块、激光接收模块、时刻鉴别单元组成。采用高精度时间数字转换芯片TDC-GP22、高性能STM32单片机作为主控器,SPLLL90_3半导体激光二极管、AD500-9作为接收的光电探测器,单片机通过SPI接口技术读取测量结果,经单片机处理后的数据传给LCD12864显示器。基于汽车的行驶方向,并根据激光测距返回的距离值计算出斥力的值,从而改变行车路径,有效地解决了汽车防撞及报警问题。
Whole design of automotive collision avoidance system is presented by this article based on pulsed flying time according to its measurement mechanism. The hardware and software on vehicles is designed with low speed and close range. The overall structure of the system is composed of laser emission module, laser receiving module and time discrimination unit, by which high precision time digital conversion chip TDC- GP22, high performance STM32 microcontroller as the main controller, SPLLL90_3 semi-conductor laser diode and AD500- 9 as a receiving photoelectric detector are adopted. Measurement results are read by microcontroller though SPI Interface technology then transmitted to the LCD12864 indicator until they are processed by microcontroller. Based on the driving direction of the car, repulsive force is calculated to change plan path according to range value returned by laser range, by which automotive collision avoidance and alarm problems have been solved effectively.
出处
《电子技术应用》
北大核心
2016年第10期80-82,共3页
Application of Electronic Technique
基金
国家自然科学基金资助项目(61304015)
