中文摘要：

为避免车辆因超速造成交通事故,提出了一种主动式车辆限速方法.方法构建的系统包括ZigBee通信部分和车载响应部分.在限速路段两端各设置3杆信号发射器,采用ZigBee无线通信技术传输限速信号,车辆在确认限速信号后就会启动车载限速装置.车载响应部分采用飞思卡尔S12系列单片机构建,主要由一个节门组件,一个车载数码管显示器和语音警报器构成.节气门组件安装在进气管后、原节气门之前,受系统CPU控制,可旋转角度调节进气量,ECU检测到实时进气量而控制油量实现限速.系统对节气门控制策略采用模糊控制理论,通过不断比较车速和限速值计算出偏差信号以及信号变化率,利用一定模糊规则得到出节气门位置模糊量,通过一定的规则转换成精确值输出.为了验证该方法的有效性,采用Matlab进行了仿真,结果表明,限速效果达到了预期的设想.

英文摘要：

This paper proposes a method of active speed limit in order to avoid traffic accident caused by speeding, which includes two parts： communication （ZigBee） and response device. Three signal poles are set in the speed limit section to transmit speed limit signal by ZigBee. The speed limit device would start to work after accepting the signal. Response device in the vehicle is controlled by Frees- cale S12 series microcontroller, which contains throttle components, digital tube display and an a- larm. The added throttle components are installed in the intake pipe before the throttle, which is con- trolled by CPU and can regulate air input through rotating. ECU can detect the amount of air to con- trol the fuel to limit speed. The added throttle components are controlled by fuzzy control theory. By comparing the limiting speed with actual speed, CPU would calculate the deviation and the accelera- tion and then use fuzzy rules to get fuzzy output volume of throttle position, which is converted into precise value to through certain rules. A simulation is used to verify the validity of this method and the results show that the effect of sDeed limit meet,~ o~~nootnt;c~n~