本文给出了一种针对公路自动收费系统的车辆分离检测而设计的,利用红外线发射和接收所形成的光幕,完全消除跟车现象,并能将半挂车、全挂车、单车可靠分离的红外车辆分离器。高可靠性红外车辆分离器的设计很好克服了传统红外车辆分离器环境适应性差、故障率高等缺点。本文还介绍了光幕形成的基本原理,并阐述了硬件关键点及实现方法,给出了系统硬件原理图、软件基本设计思想。 This paper presents a vehicle separation test for the automatic toll collection system. The light curtain formed by infrared emission and reception completely eliminates the following-car phenomenon and can reliably separate the semi-trailer, trailer and bicycle Vehicle separator. High Reliability The design of the IR vehicle splitter overcomes the disadvantages of poor adaptability and high failure rate of the traditional IR vehicle splitter. This article also introduced the basic principle of the light curtain formation, and explained the key points of the hardware and the realization method, gave out the system hardware schematic diagram, the software basic design thought.