一种新型公路收费站行驶车辆检测器

A new type of vehicle detector used for toll station

本文介绍一种简单、实用的公路收费站行驶车辆检测器的软硬件设计方法。基于感应式环形线圈 ,采用计频方式检测车辆的速度、长度、流量、到达与离开 ,并将有关资料通过RS2 32串口送至收费站监控室的监控主机。通过模拟信号滤波、变压器隔离、多频率设置、软件容错、自适应频率、超时自动复位来保证系统适应应用现场的各种不同环境 。

This article introduces a simple but practical method in designing the hardware & software of a vehicle detector used for toll station. Based on inductive loop circuit, this new device can detect the velocity, length, runoff, arrival and departure of the vehicles by calculating the frequency way,and transmit the corresponding data to the upper computer in toll station control center through RS-232 serial port of the toll computer. It can adapt to different situations on the spot and make the system maintain the best operation status by analog signals filter wave, transformer isolation ,multi_mode & multi_setup, software fault_tolerant, adaptive frequency, and auto reset in overtime.