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高速行驶车辆位置信息快速检测系统设计
资料介绍
设计了基于地感线圈的高速公路车辆位置信息检测器,采用具有输入捕捉和定时器功能的单片机,捕捉振荡信号频率的变化判断车辆位置。系统通过单片机定时模块获取多个脉冲的持续时间,通过增加脉冲数的方式增加计时时间,提高位置信息检测的精度。为了提高检测方法的鲁棒性,系统在计数持续脉冲总时间的过程中,也在实时测试每个脉冲的时间,去除脉冲时间过短的高频干扰信号。设计了自动复位功能,如若在设定时间内检测不到车辆到来,则通过外部电路使单片机复位,防止系统工作异常。系统经模拟试验测试表明,设计的振荡电路能够产生稳定的振荡信号,当模拟车辆通过时,系统能较快响应车辆位置变化。
A vehicle position information detector for freeway based on ground sensing coil is designed.A microcontroller with input capture and timer functions is used to capture the change of the frequency of the oscillating signal to judge the position of the vehicle.The system obtains the duration of multiple pulses through the timing module of the microcontroller,and increases the timing time by increasing the number of pulses,and improves the accuracy of location information detection.In order to improve the robustness of the detection method,the system also tests the time of each pulse in real time during the process of counting the total duration of the continuous pulse and removes high frequency interference signals with short pulse times.An automatic reset function is designed.If the vehicle is not detected within the set time,the microcontroller can be reset by external circuit to prevent the system from working exceptionally.The simulation test shows that the designed oscillating circuit can generate a stable oscillation signal.When the vehicle passes,the system can respond to the change of the vehicle position quickly.
部分文件列表
| 文件名 | 大小 |
| 高速行驶车辆位置信息快速检测系统设计.pdf | 2M |
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